This helper extracts every hashtag from your caption, counts them against Facebook’s recommended limit, and flags any malformed tag before you post. Facebook does not hard-block hashtags, but stuffing a post reduces reach — so the tool nudges you toward the proven 1–3 tag sweet spot.
How it works
The tool scans your text with a hashtag pattern (# followed by word characters) to find every tag. It then checks each one against Facebook’s rules: a valid hashtag must contain only letters, numbers and underscores, and a tag made entirely of digits will not link. Any tag failing these checks is flagged as invalid.
It also sums the character cost of all hashtags, including each #, because hashtags count toward your overall post character limit. A status banner turns green for 1–3 tags, amber for 4–6, and red above 6 where reach typically suffers.
Tips
- Keep the most important 1–3 hashtags in the caption; move any longer list to the first comment.
- Avoid duplicate tags — the tool highlights repeats, which waste characters and look spammy.
- Mix one broad tag with one niche tag for the best balance of reach and relevance.