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As per Jeff's suggestion in this comment:

You can use this question as a formatting sandbox. You can

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  • post comments to this question or its answers

Beware that since the changes to syntax highlighting in December 2010, and the inline hints added March 2011, no syntax highlighting is applied unless the question's tags or an inline hint enable it. So, to test highlighting here in the sandbox:

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        While not hinted otherwise: <html></html> source <b>goes</b> "here".
    
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        var a = 3;
        while (not (a > 0)) {
            alert("JavaScript code <b>goes</b> here.");
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1  
What have you tried?‮What have you tried? –  nicael Jul 4 at 16:18
1  
@nicael You're at it again... –  DatEpicCoderGuyWhoPrograms Jul 14 at 0:01

293 Answers 293

Roll the ball! Works using Markdown...

...and plain HTML

^---- Animated SVG!


Chrome's throbbers:


Formatting you possibly didn't know about:

[meta-tag:status-declined] =
[meta-tag:status-completed] =


Sorry!

Maybe hats? Maybe Stallman smells?

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25  
Dude, this is freaking epic –  Mehrdad Jul 24 '11 at 17:28
67  
Now how to find a way to fit that soccer ball into an example while helping someone with a coding problem... –  Paulpro Sep 1 '11 at 23:09
1  
Broken in Firefox 3.6. –  Mechanical snail Oct 10 '11 at 21:33
2  
@PaulPRO: Maybe on the math site? –  Mechanical snail Oct 10 '11 at 21:33
1  
@ascii-lime I'm having a hard time rotating my model of a truncated icosahedron. If only someone could provide a visual, I think I could work the code out from my existing model. Just kidding. :) –  Edwin Buck Feb 6 '13 at 21:27
4  
I'm shutting down Stack Exchange because this user told me ‮doowtA ffeJ‭ –  Doorknob Apr 30 '13 at 0:48

Starting to rebuild the castle for modern times. Looks decent on FF so far.

full block: |        |
<kbd>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</kbd>

half block: | |
<kbd>&nbsp;</kbd>

extra block: |               |
<kbd>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</kbd>

full space: |          |
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

half space: |     |
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

extra space: |               |
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

|        |
|          |
| |
|     |

|         |
|               |
|               |


open door 1

                                                                                                              


open door 2

                                                                                                  


door top 1

                                                                                                      


door top 2

                                                                                                           


full wall 1

                                                                                                        


full wall 2

                                                                                                  


wall top

                                                                                                                               


top window 1

                                                                          


top window 2

                                                                          


full top wall 1

                                                                         


full top wall 2

                                                                         


top wall top

                                                                                             


fin

                                                                                                               
                                                                                           
                                                                                           
                                                                                            
                                                                                            
                                                                                            
                                                                                                                               
                                                                                                  
                                                                                                        
                                                                                                  
                                                                                                          
                                                                                                      
                                                                                                              
                                                                                                  
                                                                                                              
                                                                                                  
                                                                                                              

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1  
<kbd>&nbsp;</kbd> How can I get it? :D –  Gediminas Jeremiah Gudelis Jun 21 '13 at 20:50

FATAL ERROR: <kbd> overflow

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24  
As all my other attempts to get <kbd> banned failed: maybe this will finally make it happen ;-) –  Arjan Dec 4 '11 at 15:54
10  
There's no reason to ban it... just simply flag answers which abuse it. (This not being one, as it's on the formatting sandbox) :) –  Alex Coplan Dec 4 '11 at 16:01
3  
Any non-castle use of <kbd> is abuse of my poor eyes! ;-) –  Arjan Dec 4 '11 at 16:20
3  
It is too tall! –  minitech Aug 21 '12 at 1:33

‮NIA‭P‮P ‭RE‮RO‭PARE‮F ‭

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45  
+1 for flashing red eyes –  The Unhandled Exception Jan 25 '11 at 21:19
2  
Test Test Test Test –  Michael Mrozek Feb 4 '11 at 8:37
1  
Who messed with the flashy red eyes?!?!?! –  John Apr 8 '11 at 16:24
3  
@John Apparently the freehand circle script flattens GIFs. I feel violated –  Michael Mrozek Apr 8 '11 at 16:47
1  
@Michael: Yes. This is wrong. What happened to rollback link? –  John Apr 8 '11 at 16:50

OMG...

from the sp​here I can see it can you see ̲͚̖͔̙î̩́t̲͎̩̱͔́̋̀ it is beautiful t​he final snuffing of the lie​s of Man ALL IS LOŚ͖̩͇̗̪̏̈́T ALL I​S LOST the pon̷y he comes he c̶̮omes he comes the ich​or permeates all MY FACE MY FACE ᵒh god no NO NOO̼O​O NΘ stop the an​*̶͑̾̾​̅ͫ͏̙̤g͇̫͛͆̾ͫ̑͆l͖͉̗̩̳̟̍ͫͥͨe̠̅s ͎a̧͈͖r̽̾̈́͒͑e n​ot rè̑ͧ̌aͨl̘̝̙̃ͤ͂̾̆ ZA̡͊͠͝LGΌ ISͮ̂҉̯͈͕̹̘̱ TO͇̹̺ͅƝ̴ȳ̳ TH̘Ë͖́̉ ͠P̯͍̭O̚​N̐Y̡ H̸̡̪̯ͨ͊̽̅̾̎Ȩ̬̩̾͛ͪ̈́̀́͘ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜Ȇ̴̟̟͙̞ͩ͌͝S̨̥̫͎̭ͯ

​ot rè̑ͧ̌aͨl̘̝̙̃ͤ͂̾̆ ZA̡͊͠͝LGΌ ISͮ̂҉̯͈͕̹̘̱ TO͇̹̺ͅƝ̴ȳ̳ TH̘Ë͖́̉ ͠P̯͍̭O̚​N̐Y̡ H̸̡̪̯ͨ͊̽̅̾̎Ȩ̬̩̾͛ͪ̈́̀́͘ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜Ȇ̴̟̟͙̞ͩ͌͝S̨̥̫͎̭ͯ̿̔̀ͅ

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33  
Does t̴͓̭̗̒́̓̉̆h̞͍̙̖͖̪̙͉ͭ̅ͪ̒̕͘ȩ̝̰̲̰͎͙͂̉͊͌ ̶̢̞͙̔͌̓ͤͤ͑̿ä̵̯̩̳̟̒͠b̨̤̖̱͎̬͈ͭͧ̽͛͛̇̇̕͝ͅö͍̙̲̞̫̳̙͕̎ͪ͐͗ͣ͜v̶͉͚̗͙̹̮̠̏ͮͬͮͬͪë̩̮̠̜͡ look like this to you? –  Arjan May 10 '11 at 6:32
1  
FoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFo‌​obarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFooba‌​rFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFo‌​obarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFooba‌​rFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFoobarFo‌​obarFoobarFoobarFoobarFoobarFoobarbaz –  Manishearth Mar 30 '12 at 7:02
25  
ส้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้ヾ( ´ ▽ `)ノส้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้ –  Walfie Jan 28 '13 at 2:18
3  
I really...just don't understand how this is possible. –  ChristopherW May 26 '13 at 14:28
7  
@ChristopherW found it! :) It's called "Zalgo text" –  Shadow Wizard May 28 '13 at 8:06

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21  
Double bonus: you can get sick staring at that for 2 minutes. –  uɐɯsO uɐɥʇɐN Dec 8 '11 at 5:54
18  
ahhhhhhhhhhhhhh. ahhhhhhhhhhhhhhhhhhh. AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH. has a seizure –  tombull89 Dec 19 '11 at 11:02
9  
Pity this is community wiki. It's definitely worth some points. –  sarnold Dec 31 '11 at 23:19
8  
‮‮So.. reversing character? –  Lix Mar 29 '12 at 10:58
1  
What, no dancing bananas? –  Edwin Buck Feb 6 '13 at 21:30

𝕿𝖊𝖘𝖙𝖎𝖓𝖌 𝕾𝖙𝖆𝖈𝖐 𝕰𝖝𝖈𝖍𝖆𝖓𝖌𝖊 𝕱𝖔𝖓𝖙𝖆𝖑𝖎𝖈𝖎𝖔𝖚𝖘𝖓𝖊𝖘𝖘

⁠            Double-Struck: 𝕋𝕖𝕤𝕥𝕚𝕟𝕘 𝕊𝕥𝕒𝕔𝕜 𝔼𝕩𝕔𝕙𝕒𝕟𝕘𝕖 𝔽𝕠𝕟𝕥𝕒𝕝𝕚𝕔𝕚𝕠𝕦𝕤𝕟𝕖𝕤𝕤
⁠                Monospace: 𝚃𝚎𝚜𝚝𝚒𝚗𝚐 𝚂𝚝𝚊𝚌𝚔 𝙴𝚡𝚌𝚑𝚊𝚗𝚐𝚎 𝙵𝚘𝚗𝚝𝚊𝚕𝚒𝚌𝚒𝚘𝚞𝚜𝚗𝚎𝚜𝚜
⁠               Sans-Serif: 𝖳𝖾𝗌𝗍𝗂𝗇𝗀 𝖲𝗍𝖺𝖼𝗄 𝖤𝗑𝖼𝗁𝖺𝗇𝗀𝖾 𝖥𝗈𝗇𝗍𝖺𝗅𝗂𝖼𝗂𝗈𝗎𝗌𝗇𝖾𝗌𝗌
⁠        Sans-Serif Italic: 𝘛𝘦𝘴𝘵𝘪𝘯𝘨 𝘚𝘵𝘢𝘤𝘬 𝘌𝘹𝘤𝘩𝘢𝘯𝘨𝘦 𝘍𝘰𝘯𝘵𝘢𝘭𝘪𝘤𝘪𝘰𝘶𝘴𝘯𝘦𝘴𝘴
⁠          Sans-Serif Bold: 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗦𝘁𝗮𝗰𝗸 𝗘𝘅𝗰𝗵𝗮𝗻𝗴𝗲 𝗙𝗼𝗻𝘁𝗮𝗹𝗶𝗰𝗶𝗼𝘂𝘀𝗻𝗲𝘀𝘀
⁠   Sans-Serif Bold Italic: 𝙏𝙚𝙨𝙩𝙞𝙣𝙜 𝙎𝙩𝙖𝙘𝙠 𝙀𝙭𝙘𝙝𝙖𝙣𝙜𝙚 𝙁𝙤𝙣𝙩𝙖𝙡𝙞𝙘𝙞𝙤𝙪𝙨𝙣𝙚𝙨𝙨
⁠                   Script: 𝒯𝑒𝓈𝓉𝒾𝓃ℊ 𝒮𝓉𝒶𝒸𝓀 ℰ𝓍𝒸𝒽𝒶𝓃ℊ𝑒 ℱℴ𝓃𝓉𝒶𝓁𝒾𝒸𝒾ℴ𝓊𝓈𝓃𝑒𝓈𝓈
⁠                   Italic: 𝑇𝑒𝑠𝑡𝑖𝑛𝑔 𝑆𝑡𝑎𝑐𝑘 𝐸𝑥𝑐h𝑎𝑛𝑔𝑒 𝐹𝑜𝑛𝑡𝑎𝑙𝑖𝑐𝑖𝑜𝑢𝑠𝑛𝑒𝑠𝑠
⁠                     Bold: 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐒𝐭𝐚𝐜𝐤 𝐄𝐱𝐜𝐡𝐚𝐧𝐠𝐞 𝐅𝐨𝐧𝐭𝐚𝐥𝐢𝐜𝐢𝐨𝐮𝐬𝐧𝐞𝐬𝐬
⁠              Bold Italic: 𝑻𝒆𝒔𝒕𝒊𝒏𝒈 𝑺𝒕𝒂𝒄𝒌 𝑬𝒙𝒄𝒉𝒂𝒏𝒈𝒆 𝑭𝒐𝒏𝒕𝒂𝒍𝒊𝒄𝒊𝒐𝒖𝒔𝒏𝒆𝒔𝒔
⁠                  Fraktur: 𝔗𝔢𝔰𝔱𝔦𝔫𝔤 𝔖𝔱𝔞𝔠𝔨 𝔈𝔵𝔠𝔥𝔞𝔫𝔤𝔢 𝔉𝔬𝔫𝔱𝔞𝔩𝔦𝔠𝔦𝔬𝔲𝔰𝔫𝔢𝔰𝔰
⁠             Bold Fraktur: 𝕿𝖊𝖘𝖙𝖎𝖓𝖌 𝕾𝖙𝖆𝖈𝖐 𝕰𝖝𝖈𝖍𝖆𝖓𝖌𝖊 𝕱𝖔𝖓𝖙𝖆𝖑𝖎𝖈𝖎𝖔𝖚𝖘𝖓𝖊𝖘𝖘


𝒯𝑒𝓈𝓉𝒾𝓃ℊ 𝒮𝓉𝒶𝒸𝓀 ℰ𝓍𝒸𝒽𝒶𝓃ℊ𝑒 ℱℴ𝓃𝓉𝒶𝓁𝒾𝒸𝒾ℴ𝓊𝓈𝓃𝑒𝓈𝓈

⁠            Double-Struck: 𝕋𝕖𝕤𝕥𝕚𝕟𝕘 𝕊𝕥𝕒𝕔𝕜 𝔼𝕩𝕔𝕙𝕒𝕟𝕘𝕖 𝔽𝕠𝕟𝕥𝕒𝕝𝕚𝕔𝕚𝕠𝕦𝕤𝕟𝕖𝕤𝕤
⁠                Monospace: 𝚃𝚎𝚜𝚝𝚒𝚗𝚐 𝚂𝚝𝚊𝚌𝚔 𝙴𝚡𝚌𝚑𝚊𝚗𝚐𝚎 𝙵𝚘𝚗𝚝𝚊𝚕𝚒𝚌𝚒𝚘𝚞𝚜𝚗𝚎𝚜𝚜
⁠               Sans-Serif: 𝖳𝖾𝗌𝗍𝗂𝗇𝗀 𝖲𝗍𝖺𝖼𝗄 𝖤𝗑𝖼𝗁𝖺𝗇𝗀𝖾 𝖥𝗈𝗇𝗍𝖺𝗅𝗂𝖼𝗂𝗈𝗎𝗌𝗇𝖾𝗌𝗌
⁠        Sans-Serif Italic: 𝘛𝘦𝘴𝘵𝘪𝘯𝘨 𝘚𝘵𝘢𝘤𝘬 𝘌𝘹𝘤𝘩𝘢𝘯𝘨𝘦 𝘍𝘰𝘯𝘵𝘢𝘭𝘪𝘤𝘪𝘰𝘶𝘴𝘯𝘦𝘴𝘴
⁠          Sans-Serif Bold: 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗦𝘁𝗮𝗰𝗸 𝗘𝘅𝗰𝗵𝗮𝗻𝗴𝗲 𝗙𝗼𝗻𝘁𝗮𝗹𝗶𝗰𝗶𝗼𝘂𝘀𝗻𝗲𝘀𝘀
⁠   Sans-Serif Bold Italic: 𝙏𝙚𝙨𝙩𝙞𝙣𝙜 𝙎𝙩𝙖𝙘𝙠 𝙀𝙭𝙘𝙝𝙖𝙣𝙜𝙚 𝙁𝙤𝙣𝙩𝙖𝙡𝙞𝙘𝙞𝙤𝙪𝙨𝙣𝙚𝙨𝙨
⁠                   Script: 𝒯𝑒𝓈𝓉𝒾𝓃ℊ 𝒮𝓉𝒶𝒸𝓀 ℰ𝓍𝒸𝒽𝒶𝓃ℊ𝑒 ℱℴ𝓃𝓉𝒶𝓁𝒾𝒸𝒾ℴ𝓊𝓈𝓃𝑒𝓈𝓈
⁠                   Italic: 𝑇𝑒𝑠𝑡𝑖𝑛𝑔 𝑆𝑡𝑎𝑐𝑘 𝐸𝑥𝑐h𝑎𝑛𝑔𝑒 𝐹𝑜𝑛𝑡𝑎𝑙𝑖𝑐𝑖𝑜𝑢𝑠𝑛𝑒𝑠𝑠
⁠                     Bold: 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐒𝐭𝐚𝐜𝐤 𝐄𝐱𝐜𝐡𝐚𝐧𝐠𝐞 𝐅𝐨𝐧𝐭𝐚𝐥𝐢𝐜𝐢𝐨𝐮𝐬𝐧𝐞𝐬𝐬
⁠              Bold Italic: 𝑻𝒆𝒔𝒕𝒊𝒏𝒈 𝑺𝒕𝒂𝒄𝒌 𝑬𝒙𝒄𝒉𝒂𝒏𝒈𝒆 𝑭𝒐𝒏𝒕𝒂𝒍𝒊𝒄𝒊𝒐𝒖𝒔𝒏𝒆𝒔𝒔
⁠                  Fraktur: 𝔗𝔢𝔰𝔱𝔦𝔫𝔤 𝔖𝔱𝔞𝔠𝔨 𝔈𝔵𝔠𝔥𝔞𝔫𝔤𝔢 𝔉𝔬𝔫𝔱𝔞𝔩𝔦𝔠𝔦𝔬𝔲𝔰𝔫𝔢𝔰𝔰
⁠             Bold Fraktur: 𝕿𝖊𝖘𝖙𝖎𝖓𝖌 𝕾𝖙𝖆𝖈𝖐 𝕰𝖝𝖈𝖍𝖆𝖓𝖌𝖊 𝕱𝖔𝖓𝖙𝖆𝖑𝖎𝖈𝖎𝖔𝖚𝖘𝖓𝖊𝖘𝖘

𝚃𝚎𝚜𝚝𝚒𝚗𝚐 𝚂𝚝𝚊𝚌𝚔 𝙴𝚡𝚌𝚑𝚊𝚗𝚐𝚎 𝙵𝚘𝚗𝚝𝚊𝚕𝚒𝚌𝚒𝚘𝚞𝚜𝚗𝚎𝚜𝚜

Hey there buddy, whadya think of my swell 𝚖𝚘𝚗𝚘𝚜𝚙𝚊𝚌𝚎 here? I think it is not just 𝓃𝒾𝒻𝓉𝓎 — it is truly 𝕰𝖝𝖈𝖊𝖑𝖑𝖊𝖓𝖙 all over!


𝕋𝕖𝕤𝕥𝕚𝕟𝕘 𝕊𝕥𝕒𝕔𝕜 𝔼𝕩𝕔𝕙𝕒𝕟𝕘𝕖 𝔽𝕠𝕟𝕥𝕒𝕝𝕚𝕔𝕚𝕠𝕦𝕤𝕟𝕖𝕤𝕤

  • 𝚷 1D6B7 MATHEMATICAL BOLD CAPITAL PI
  • 𝛑 1D6D1 MATHEMATICAL BOLD SMALL PI
  • 𝛡 1D6E1 MATHEMATICAL BOLD PI SYMBOL
  • 𝛱 1D6F1 MATHEMATICAL ITALIC CAPITAL PI
  • 𝜋 1D70B MATHEMATICAL ITALIC SMALL PI
  • 𝜛 1D71B MATHEMATICAL ITALIC PI SYMBOL
  • 𝜫 1D72B MATHEMATICAL BOLD ITALIC CAPITAL PI
  • 𝝅 1D745 MATHEMATICAL BOLD ITALIC SMALL PI
  • 𝝕 1D755 MATHEMATICAL BOLD ITALIC PI SYMBOL
  • 𝝥 1D765 MATHEMATICAL SANS-SERIF BOLD CAPITAL PI
  • 𝝿 1D77F MATHEMATICAL SANS-SERIF BOLD SMALL PI
  • 𝞏 1D78F MATHEMATICAL SANS-SERIF BOLD PI SYMBOL
  • 𝞟 1D79F MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL PI
  • 𝞹 1D7B9 MATHEMATICAL SANS-SERIF BOLD ITALIC SMALL PI
  • 𝟉 1D7C9 MATHEMATICAL SANS-SERIF BOLD ITALIC PI SYMBOL

¿əɹəɥʇ ʇno ʎpoqʎuɐ əɹəɥʇ sI

Iꜱ ᴛʜᴇʀᴇ ᴀɴʏʙᴏᴅʏ ᴏᴜᴛ ᴛʜᴇʀᴇ? (Just nod if you can hear me.)

𝛑𝛑𝛑𝛑𝛑 𝜋𝜋𝜋𝜋𝜋 𝝅𝝅𝝅𝝅𝝅

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2  
Works great in Firefox, doesn't work in Chromium. –  uınbɐɥs Aug 21 '12 at 3:50

Up up and awayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

Bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

Down down and beloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooow

Pew pew: ้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้้

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4  
This is definitely the most intrusive entry. Love it :-) –  Jonathon Reinhart Oct 16 '13 at 5:25
1  
I sincerely hope you wrote a script for that, and didn't write it by hand. Side note - <sup>y</sup><sup><sup>y</sup></sup> can be just <sup>y<sup>y</sup></sup> (which is possibly (slightly) easier to write a script for). –  Dukeling Nov 23 '13 at 13:35
2  
@Dukeling: Yup: sup = lambda text, depth=1: ('<sup>' + text) * depth + '</sup>' * depth. Although it seems like the visible ys max out at a height of 102. –  Blender Nov 23 '13 at 20:28

BLOCKQUOTE OVERFLOW

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35  
What....on....earth....is....that? :P –  Lix May 9 '12 at 7:08

Testing a possible bug with flags. Good thing I can flag my own answers.

Mods, ignore flags on this answer if they end up going through.

While I'm here:

                                    -:://                                                                                                                                                                                                         
                                    :++++.                                                                                                                                                                                                        
                         `-`        .++++:                                                                                                                                                                                                        
                       -////-        +++++                                                                                                                                                                                                        
                       `/////:`      :++++.                                                                                                                                                                                                       
                         ://///.     .++++:                                                                                                                                                                                                       
                          ./////-     /++++                                                                                                                                                                                                       
               --`         `://///`   :++++.                                                                                                                                                                                                      
              :+++/:.        -/////.  .++++:                                                                                                                                                                                                      
             ./+++++++:.`     ./////:  /++++                                                                                                                                                                                                      
                .:+++++++/-`   `://///`-+++/.                                                                                                                                                                                                     
                   .-/+++++++:.` -////- `                                                                                                                                                                                                         
          `.`         `-/+++++++/-.-`                                                                                                                                                                                                             
          :+++/:--.`      .:/++++/`                                                                                                                                                                                                               
         .+++++++++++//:-..` `-/:                                                                                                                                                                                                                 
          ``.-://++++++++++++/:-                                                                                                                                                                                                                  
 /+++.            `.--:/+++++++. /+++.                                                       oo:                                                                      .+oyyy  :ooo:                                                               
 /ooo.  `--.....```      ``.-::  /ooo.                   -++                                 MMo                                                                     oMMMMMM  oMMMo                                                               
 /ooo.  -+++++++++++++++///:::`  /ooo.                   oMM                                 MMo                                                                     MMMM+--  oMMMo                                                               
 /ooo.  :+++++++++++++++++++++.  /ooo.        `-::.`   `.sMM...    `.::-.          `-::.     MMo     `...    -+syyys/`  :ssso     -ssso`  -+syyys/`    .sss+:oyyys//+MMMM+++  oMMMo      -+syyys/`  :ssso     oss/    .ssss`                      
 /ooo.        ```...---::::://   /ooo.     `sNMmmmmMNy`-mNMMmmm  oNMNmmmMNh-    .yNMNmmMNh-  MMo    /mMd-  -dMMMMMMMMMy``mMMMo   `mMMMo -dMMMMMMMMMy`  :MMMMMMMMMMymMMMMMMMM  oMMMo    -mMMMMMMMMMy``NMMM+   +MMMM-   yMMMh                       
 /ooo.  //////////////////////   /ooo.     yMd.    `:`   oMM     :s.    `yMM.  -NMs.   `/o`  MMo  -hMm/   `NMMMy:-/dMMMh -MMMN.  oMMMd .NMMN/.`-yMMMh  :MMMMh:-/s. .-MMMM---  oMMMo   .NMMMy:-/dMMMh +MMMm  .NMMMMd  .MMMN.                       
 /ooo.  oooooooooooooooooooooo   /ooo.     yMm:``        oMM             :MM:  mMy           MMo`yMMo     /MMMm    .MMMM  +MMMh -MMMN. sMMMh+++++MMMM- :MMMM         MMMM     oMMMo   /MMMm    .MMMM  hMMM+ hMMNMMMo hMMMo                        
 /ooo.  ++++++++++++++++++++++   /ooo.     `odNMMNNmdo`  oMM     /hmNmmmmNMM:  MMo           MMdNNmMm.    oMMMh     MMMM-  hMMM+dMMM:  hMMMMMMMMMMMMM: :MMMM         MMMM     oMMMo   oMMMh     MMMM` -MMMNoMMM-sMMM+MMMm                         
 /ooo.                           /ooo.         ```.:dMd  oMM    sMN:`    :MM:  mMs           MMMy.`yMN/   /MMMN`   :MMMM   `NMMMMMMs   oMMMy`````````  :MMMM         MMMM     oMMMo   /MMMN`   :MMMM   oMMMMMMs `mMMMMMM-                         
 /ooo:---------------------------+ooo.     :/`      yMN  oMM`   hMh      oMM:  /MM+     :/   MMs    +MMs   mMMMmo+sNMMMs    -MMMMMd    `NMMMd+//odNo`  :MMMM         MMMM     oMMMm++-`mMMMmo+sNMMMs   `mMMMMm`  -MMMMMy                          
 /ooooooooooooooooooooooooooooooooooo.    -dMMdhsyhNMh-  `dMNhh .mMNhsshNNMM:   :dMNhhhNMm/  MMo     :NMh. `sNMMMMMMMd/      oMMMN.     `sNMMMMMMMMd:  :MMMM         MMMM     `yMMMMMo `sNMMMMMMMd/     :MMMM-    sMMMN`                          
 .-----------------------------------`      `-/++++:`      .:++   ./+++/-.++`     `:+++/.    ++-      .++:    -/+++:.         /++-         -/++++:`    `++++         ++++       `::++-    -/+++:.        /++:     `+++-                           
share|improve this answer
1  
o_____________O –  It'sNotALie. May 5 '13 at 8:27
6  
Wow. Just... wow. –  michaelb958 Jul 1 '13 at 15:23

Lynx FTW!!!

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59  
Fixed obvious typo. –  badp Mar 4 '11 at 17:34
4  
@badp Do not vandalize posts. I will flag you. :P –  muntoo Nov 24 '11 at 4:53
Robert'); DROP TABLE Students;--

enter image description here

(image by http://xkcd.com/327/)

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8  
aah, Exploits of the mom :) –  genesis Jul 24 '11 at 13:11

!!‮ This post is seriously messed up now!

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35  
I do not believe this. –  muntoo Nov 24 '11 at 5:00
2  
󠀠󠀠󠀠󠀠󠀠󠀠󠀠󠀠 –  Vi. Aug 18 '12 at 1:27
13  
<$‮ This post is seriously messed up now ! –  Mechanical snail Sep 20 '12 at 22:06
2  
<$‮ This post is seriously messed up now ! –  hims056 Oct 29 '12 at 13:17
7  
This is a comment‮dilav sa deggalf neeb sah tnemmoc sihT‭ –  Johannes Kuhn May 14 '13 at 12:01

Thanks for your edit!
This edit will be visible only to you until it is peer reviewed. Just kidding, your edit was horrible, and nobody cared enough to accept it.

Answer, testing comments, creating a new answer so nobody gets bugged by the inbox

Just testing a link that I have never visited.
Just testing a link that I have visited.

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15  
YOU'RE BUGGING MY INBOX :D:D:D –  Ólafur Waage Feb 25 '11 at 20:54
12  
@OLAFUR, YOU TOO :) –  Benjol Feb 28 '11 at 7:50

Testing Recursion.

See this answer for more details.

Which came first, this answer or the link to it? :P

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1  
This is awesome! You know what can I do with this?? –  Gediminas Jeremiah Gudelis Jun 21 '13 at 21:01
3  
Wow... How did you know the URL before you made the post? –  tbodt Oct 25 '13 at 23:51
3  
Recursion at its finest –  Wold Nov 8 '13 at 1:58

Normal text, Small text, Tiny text, YesThisIsNotASimpleLineButByTypingContinuouslyICanSaveTheWorld

In-page anchor

Testing tags: and

Broken Link

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14  
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​ –  kapep Dec 4 '11 at 21:30

Runnable Code Blocks Using a User Script

var canvas = document.createElement( "canvas" ),
    ctx = canvas.getContext( "2d" );
canvas.width = 640;
canvas.height = 320;
canvas.style.margin = "0 auto";
canvas.style.background = "rgb( 0, 0, 32 )";
ctx.lineWidth = 5;
out.appendChild( canvas );

for ( var i = 0; i < 1024; ++i ) {
  ctx.strokeStyle = "rgba( 200, " + ((128 + Math.random() * 127)|0) + ", 0, " + 0.1 * Math.random() + " )";
  ctx.beginPath();
  ctx.arc( 320 - 40 * Math.random(), 160 - 20 * Math.random(), Math.random() * 256,
           Math.random() * Math.PI * 1.5, Math.random() * Math.PI * 0.5, true );
  ctx.stroke();
}

  [ run with user script ]  

$( out ).append( $( "<p>Hello World</p>" ) );

  [ run with user script ]  

var message = "Hello World",
    messageEl = document.createElement( "p" );

messageEl.textContent = message;
out.appendChild( messageEl );

  [ run with user script ]  

Want to be able to run your code like that? Just add this line following a code block:

 <img src="http://i.stack.imgur.com/V6KuG.gif" width="480" height="1" /><sup><sup><sup><sup><sup>**[`  [ run with user script ]  `](http://scripts.jeremybanks.ca/run-stackexchange-code-0.0.user.js)**</sup></sup></sup></sup></sup>

Your code's wrapped in a function under the global context, only given the out element as an argument.

Prevent Scroll Bars From Being Hidden on Code Blocks on Mac OS X 10.7 "Lion"

Here's a code block that's probably scrollable in both directions. If you're using a trackpad with Mac OS X 10.7 "Lion", you can install this user script that uses this code to prevent scroll bars from being hidden on code blocks.

atest( "TO FAIL | return false", function () { return false; } );
atest( "TO FAIL | do nothing", function () { } );
atest( "TO FAIL | error", function () { throw new Error; } );

atest( "TO FAIL | don't let more than 2 seconds pass", function ( assert, pass, toCleanUp ) {
  var start = new Date;

  return function poll () {
    assert( ((new Date) - start) < 2000, "two seconds must not pass" );
    return poll;
  }
} );

atest( "return true", function () { return true; } );

atest( "Count to 10 Over 1 Second", function ( assert, pass, toCleanUp ) {
  var val = 0,
      incInterval = setInterval( incVal, 100 );

  function incVal () {
    val += 1;
  }

  toCleanUp(function () {
    clearInterval( incInterval );
  })

  return function poll () {
    return ( val > 10 ) ? true : poll;
  };
});

atest( "Load /", function ( assert, pass, toCleanUp ) {
  jQuery.ajax( "/" ).done(function ( data ) {
    pass( "Loaded " + data.length + " chars." );
  });
});

atest( "Adding even integers doesn't produce an odd one", function ( assert, pass, toCleanUp ) {
  for (var n = -10000; n < 10000; n += 2) {
    assert( n % 2 === 0, "" + n + " is not a multiple of two." )
  }
  pass();
});

/*\
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  
  atest( name, body( assert, pass, toCleanUp ) );                    *
    Declares an test with the specifed name and body. It will be     *
    run synconously with other tests defined syncronously with it.   *
                                                                     *
  runaTest( body( assert, pass, toCleanUp ) );                   *
    Executes a test body and returns a promise of the result.        *
                                                                     *
  A test body can return true to pass, false to fail or a function   *
  to continue to it asyncronously. This happens with a delay, so it  *
  can be used to poll some state.                                    *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
\*/

runaTest.timeout = 5000;
runaTest.tickDelay = 100;
atest.cooldown = 250;

function atest ( name, body ) {
  if ( !atest.buffer ) {
    atest.buffer = [];
    setTimeout( triggerTests, 0 );
  }

  atest.buffer.push( [ name, body ] );

  function triggerTests () {
    var buffer = atest.buffer,
        i = 0;

    delete atest.buffer;
    triggerNext();

    function triggerNext () {
      if ( i < buffer.length ) {
        var name = buffer[ i ][ 0 ],
            body = buffer[ i ][ 1 ],
            testRun = runaTest( body );

        testRun.then(function passed () {
          $("<p/>").text( [ "pass [" + name + "]" ].concat( [].slice.call( arguments ) ).join(" - ") ).appendTo(out);
        }, function failed () {
          $("<p/>").text( [ "FAIL [" + name + "]" ].concat( [].slice.call( arguments ) ).join(" - ") ).css("color", "red").appendTo(out);
        });

        testRun.always(function () {
          setTimeout( triggerNext, atest.cooldown );
        });

        ++i;
      }
    }
  }
}

function runaTest ( body ) {
  var result = new jQuery.Deferred,
      tickInterval = setInterval( tick, runaTest.tickDelay ),
      timeoutTimeout = setTimeout( result.reject, runaTest.timeout, "Timeout" ),
      active = body;

  return result.promise();

  function assert ( condition, msg ) {
    if ( !condition ) {
      var failArgs = [ "Assertion failed" ].concat( [].slice.call( arguments, 1 ) );
      result.reject.apply( result, failArgs ) ;
    }
  }

  function tick () {
    if ( result.state() === "pending" ) {
      if ( typeof active === "function" ) {
        try {
          active = active.call( result, assert, result.resolve, result.always );
        } catch ( ex ) {
          result.reject( "Uncaught exception", ex );
          $("<p/>").text(ex.stack).appendTo(out);
        }
      } else if ( active === true ) {
        result.resolve();
      } else if ( active === false ) {
        result.reject();
      }
    } else {
      clearInterval( tickInterval );
    }
  }
}

  [ run with user script ]  

Tag Markup Castle

                                                                             
                                                                             
                                                                             
                                                                             
                                                                             
                                                                                               
                                                                                                                                           
                                                                                                                                                                                              
                                                      
                                         
                                                        
                                                       
                                                        
                                                       

share|improve this answer
1  
Freaking awesome! –  Mistu4u Jan 4 '13 at 8:42
1  
This is terribly borked now. –  The Guy with The Hat Apr 17 at 14:01

kbd is back!


Castle building will resume in 3... 2... 1...

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1  
Hola! –  Yi Jiang Feb 13 '11 at 7:10
3  
_________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ –  uɐɯsO uɐɥʇɐN Feb 21 '11 at 1:24
6  
^------ Stack of Pancakes! (Er... I mean waffles...) –  uɐɯsO uɐɥʇɐN Feb 21 '11 at 1:24

Do formulas work? $\sum_{i=1}^n \frac{i}{3} = a \cdot b$

Hmm, no sandbox for math.stackexchange.com.

share|improve this answer
2  
No MathJax here on Meta. –  Shadow Wizard Nov 7 '13 at 20:00
test

going 1 #going 1

going 2 ##going 2

going 3 ###going 3

gone 4 ####gone 4

gone 5 gone 5


superscript, subscript

More testing

And More testing

Even More testing

I saw somewhere I think on this site, the ability to format text so that it looks kind of like keys, for showing key combinations. The notation was something like this:

<key>ctrl</key> + <key>C</key>

Then the Ctrl and the C had borders that made them look like little keys. Does this site have that kind of thing? Anyone? Bueller?

It's

<kbd>ctrl</kbd> + <kbd>C</kbd>

ctrl + C


share|improve this answer
3  
The tag is <kbd>, but apparently it has no styling in Meta –  RichN Sep 8 '10 at 16:02
2  
Because of Pesto's castle, meta.stackexchange.com/q/1974 –  hyperslug Sep 18 '10 at 22:28
1  
lol, that was pretty funny/interesting. Thanks for that. –  funkymushroom Sep 19 '10 at 14:13

having trouble getting rid of the sliver between the images (wrapping them in a <h1></h1> helps.)

share|improve this answer
31  
‮Please do not speak of being messed up until you read this! –  uɐɯsO uɐɥʇɐN Jan 11 '11 at 22:40
4  
@Nyu: O the wonders of Unicode! –  uɐɯsO uɐɥʇɐN Jan 30 '11 at 20:10
11  
No seriously - how do you flip even the time block? –  RichardTheKiwi Mar 3 '11 at 1:46
2  
(^_^) [ ](meta.stackoverflow.com) –  Awesome Poodles Mar 9 '11 at 13:56
3  
@JefMercado: Please? –  Ullallulloo May 4 '11 at 19:50
1  
‮...yletanutrofnu ,gnitaehc yb ylno tub ,ti tog I –  minitech May 25 '11 at 2:21
4  
I can turn the world inside out! I'll start with the comment stamp...‮ –  Daniel δ Sep 29 '11 at 17:17
1  
‮At last! At long last! The secret is mine! –  John Oct 11 '11 at 1:15
7  
Ha! I am over here :-P ‮this is a test –  amanaP lanaC A nalP A naM A Dec 7 '11 at 16:48
1  
I Roamed Under It As A Tired Nude Maori ‮‮ i roaMed uNder iT As A tIred nUde maoRI –  Manishearth Mar 27 '12 at 12:42
1  
Yay, I figured it out!! Copy the character inside the codeblock to get it it's a mirroring character. Note that the codeblock may have placed itself after my username. "‮‮ " –  Manishearth Mar 27 '12 at 12:43
18  
Hello, I am Jon Skeet. ‮‮ teekS noJ - –  Manishearth Mar 30 '12 at 11:18

Testing:

Hmmm. The tags do not properly show in the edit preview. Still OK in the posted version?

share|improve this answer
8  
) ouch my eyesss.. –  systempuntoout Jul 1 '11 at 21:41
1  
They are fine on the edit preview now. –  hexafraction Aug 17 '12 at 14:16

As you can C, variables in C that start with an uppercase letter are displayed in a different colour.

int main()
{
   int a = 1;
   int A = 1;
   int aa = 1;
   int Aa = 1;
   int AA = 1;
}
  1. Also this is a link

  2. Also this is a link

  3. Also this is a link

  4. Also this is a link

  5. Also this is a link

  6. Also this is a link

  7. Also this is a link

  8. Also this is a link

  9. Also Rotterdam, NL is a link

share|improve this answer

Comment tests.

share|improve this answer
6  
test test test __test _test_ test__ –  badp Jul 18 '10 at 12:56
8  
̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̣̤̤̤̤̤̤̤̤̤̤f̤̤̤̥̥̥̥̥̥̥̥̥̥̥f –  The Unhandled Exception Feb 17 '11 at 18:37
2  
Click here to go nowhere –  user2428118 Mar 9 '13 at 21:01

Towers of Hanoi

Reset

share|improve this answer
3  
How on earth did you do that? –  tbodt Oct 10 '13 at 2:17

Testing transparent images...

Nope, resized images still can't be transparent.

Original is transparent:

Trying to trigger Captcha again... oh no luck

http://www.google.com

share|improve this answer
3  
YEZ, I AGREE WIF U. INDED THAR IZ NO FILTR –  Lix Mar 27 '12 at 12:35

Tag Presentation

Testing Unicode: ▛▙▟▜▐▀▄▌▘▛▙▟▜ ▄█▀

  _____ _             _     ____                  __ _               
 / ____| |           | |   / __ \                / _| |              
| (___ | |_ __ _  ___| | _| |  | |_   _____ _ __| |_| | _____      __
 \___ \| __/ _` |/ __| |/ / |  | \ \ / / _ \ '__|  _| |/ _ \ \ /\ / /
 ____) | || (_| | (__|   <| |__| |\ V /  __/ |  | | | | (_) \ V  V / 
|_____/ \__\__,_|\___|_|\_\\____/  \_/ \___|_|  |_| |_|\___/ \_/\_/  

share|improve this answer
4  
▛▙▟▜▐▀▄▌▘▛▙▟▜ ▄█▀ radp taught me how to do this :-) –  athspk Jan 12 '11 at 12:08

share|improve this answer
5  
Haha, no way! meta.stackexchange.com/questions/40925/… –  Arjan Nov 13 '10 at 17:05
5  
–  HoLyVieR Feb 17 '11 at 18:40
2  
. –  fredley Mar 9 '11 at 10:26

Hi

Hi

Look! ↗Hi this is tiny text and I don't know if you can see this if you can you must have zoomed in or edited my post and saw the markdown or something like that. Pie is good, by the way.

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Your text was too large. This has been fixed. –  Mechanical snail Feb 7 '13 at 1:21

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