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There's one question in SO I'm planning to answer with a really long answer. While I'm still baking my post, these questions dawned to me:
What is the maximum character length of a post?
How many links can I include, at most?
How about the number of images?
What is the character limit on the question title?
Do the limits on questions apply to answers as well, or do they have different ceilings?
The maximum length of a post, question or answer, on Stack Overflow is 30,000 characters. This includes markdown and any other formatting. The limit on the question title is 150 characters.
I don't believe there are any upper limits on the number of links and images. I challenge you to make a post so heavy on links and images that we're tempted to add some. ;)
nvarchar(max), 2GB worth of character data. Not sure if such posts can be edited without shortening them first.
As was already answered, the limit on titles is 150 characters. We just released a new feature network-wide (including Stack Overflow for Teams) where users will be shown a character count starting when the Title hits 100 characters (this was originally requested by the Mathematics meta community in 2012…err…6-8 weeks ago).
The count will appear above the right end of the Title input box and will function in the same way as the character counter used elsewhere on the site (most prominently with comments):
When you go over the limit, an error state will show on the box. The character count will update as changes are made to the title. The counter will count actual text in the box (so if you are including something like LaTeX in the title, it will count the number of character before rendering it).
maxlength="150" on the title textbox?
Mar 18, 2021 at 15:45
len(Title) > 150 then the edit will have to bring it under 150. We do not have code in their to allow the "too-long-title" status to be grandfathered in.
Mar 18, 2021 at 16:39
maxlength, in addition to what @zcoop98 said about this being our convention elsewhere - we find it to be more friendly. Let the user type out all that they need, and if over, they can reduce the length. This is especially pertinent on sites like Math.SE (the originator of this request) where LaTeX in titles (where pre-render length can be much longer than post-render length) where users faced specific challenges in this area.
Mar 18, 2021 at 16:41