How to use the Facebook Post Checker
- Paste the post text. Include any link. The tool shows the part before "See more" and the part hidden behind it.
- Check the link card. Facebook builds the preview from the first URL. The tool pulls that URL out and shows a card placeholder so you can see which link leads.
- Switch to Reel if needed. For a Reel, enter the video length in seconds and the tool checks the 3 to 90 second range on Meta's API page.
- Add a planned time. Pick a date and time to see whether it falls inside the 10 minute to 30 day window used for API scheduling, then fix the flagged phrases.
How the Facebook post checker works
What it checks
Length against the widely documented limit. The "See more" fold with a shown and hidden view. The first URL and a placeholder card with the domain. Hashtag count. Typed @ mentions that are malformed. A list of engagement-bait phrases such as "like if", "share if", "tag someone" and "comment yes". For Reels, the video length. For scheduled posts, the lead time.
All checks run in your browser and nothing you paste is uploaded.
Rules and sources
Per Meta's developer documentation, checked October 2026: a Facebook Reel runs 3 to 90 seconds (Reels Publishing API page, which may lag the app), and a scheduled Page post must publish between 10 minutes and 30 days after the request (Pages API, posts).
Meta's newsroom post "Fighting Engagement Bait on Facebook" says Facebook demotes posts from people and Pages that use engagement bait. The phrase list here is our own reading of the examples it gives.
Widely documented but not verified on an official page, and labeled so: the 63,206 character limit. Observed and approximate: the fold near 477 characters on desktop.
Limitations
The card is a placeholder. The real card depends on the page's own preview tags and cannot be fetched here. The bait check is a phrase match, so it misses new wording and may flag an honest sentence. A typed @ name stays plain text until it is tagged inside Facebook, so the tool can only warn about the syntax.
Frequently asked questions
What is the character limit for a Facebook Page post?
63,206 characters is the figure widely documented for Page post text. We could not confirm it on an official Meta page in October 2026, so treat it as widely documented, not verified. In practice almost no post gets near it, and the fold matters far more.
Where does "See more" cut a Facebook post?
On desktop it has been observed at roughly 477 characters, and earlier on a phone or when the text has many line breaks. Meta does not publish the number, so the preview here is approximate. Lead with the point and keep the link above the fold.
Which link does Facebook use for the preview card?
The first URL in the post is the one Facebook reads to build the card. If you paste two links, the second one will not get its own card. The tool lists every link and marks which one leads.
Are hashtags clickable on Facebook?
Yes. A hashtag opens a results page for that tag. Use a few that fit the topic. Long strings of hashtags read as clutter on a Facebook post.
What counts as engagement bait on Facebook?
Posts that push people to react, comment, share or tag to boost reach, such as "Like if you love summer" or "Tag someone who needs this". Meta wrote in its newsroom post "Fighting Engagement Bait on Facebook" that it demotes such posts. The tool matches common phrases. It is not Meta's detector and has no numbers on the effect.
How far ahead can I schedule a Facebook post?
Through the Pages API, the publish time must be between 10 minutes and 30 days from the request, per Meta's Pages API posts documentation (checked October 2026). The scheduler inside Facebook has its own limits that this tool does not test.