Social media limits by network
Video length, file size, image dimensions and character limits, each with the network's own page as the source and the date it was checked. Where PostDaily's limit differs, it says so.
- Instagram limitsA caption holds 2,200 characters and, since December 2025, five hashtags. Here is every Instagram limit that decides whether a post goes out, with the page each number comes from, including two places where Meta's own documents disagree.
- YouTube Shorts limitsA Short is a square or vertical video of three minutes or less. Here is every limit that decides whether an upload lands as a Short, with the YouTube page each number comes from.
- TikTok limitsWhat TikTok accepts from a scheduling app is not quite what the TikTok app lets you do. These are the limits of TikTok's Content Posting API, the route every scheduler uses, with the TikTok page each comes from.
- Pinterest limitsThe right Pin size is 1000×1500 pixels, a 2:3 ratio. Here is that and every other Pinterest limit, from Pinterest's own product specs.
Character limits for every network are in the character limits guide, and the video format checker tests a file against these rules in your browser.