Bio Character CounterWrite a profile bio and see characters used and remaining for typical platform limits.
Post Length Checker
Write once, check everywhere. The checker counts your post the way each platform is known to: X weights links as 23 characters and some symbols double, Bluesky counts visible characters, and Mastodon counts links as 23. Limits are editable because they change.
Limits are typical values checked in October 2026. Platforms change them without notice, so every limit here is editable.
Runs entirely in your browser. Your input and files are not uploaded to any server.
How to use
- Paste or type your post.
- Review the table: green fits, red is too long.
- Edit a limit if your account has a different one (for example a paid tier).
Examples
Cross-posting
A 420-character announcement fits Threads and Mastodon but is 140 over on X.
Links
A long tracking URL counts as 23 on X and Mastodon, but in full on LinkedIn.
Privacy
Your files and text stay in your browser while you use this tool, and ads or anonymous visit statistics do not receive them. Only your favorites and recent tools are saved on your device. Privacy policy
Want proof? Check it with your browser’s Network tab: How to check that a tool does not upload your files
Frequently asked questions
How exactly does X count?
This uses the published twitter-text weighting rules: most Latin, Arabic and other common scripts count 1, other characters (such as CJK and emoji) count 2, and every URL counts 23. Edge cases may differ slightly.
Why can my limit be higher?
Some platforms give longer limits to paid or verified accounts. Change the limit in the table.
Related tools
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