Why posts fail to publish
Most failed posts break one simple rule: the caption is a few characters too long for X, an Instagram caption carries a sixth hashtag, or a post has more images than the network takes. Networks count differently too. X counts every link as 23 characters and an emoji as 2, Bluesky counts an emoji as 1, and Mastodon ignores the server part of a mention. The checker counts the way each network does, so a post that fits on LinkedIn but not on X shows up at once.
Errors and warnings
Red items block publishing: too long, too many hashtags, no media on a network that needs it (Instagram, TikTok, Pinterest and YouTube), too many files, a media type the network does not take, or a video that is too short or too long. Amber items publish but cost you reach or clicks: Instagram and LinkedIn hide the rest of the text behind see more, and Instagram captions do not make links clickable.
Check once, post everywhere
When every card says Ready, click Schedule this above to open the post as a draft in PostBoost and schedule it to all your networks at once. PostBoost runs the same checks again on the real accounts, including limits that depend on the account, before anything goes out.