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
Runs entirely in your browser. Your input and files are not uploaded to any server. See the privacy policy for what is stored in your browser (favorites and history only). Privacy policy
Check it yourself: open your browser’s developer tools, select the Network tab and use the tool. Your file never appears in an upload request. Once this page is saved for offline use, you can also disconnect from the internet and keep working. Ads and anonymous visit statistics, when enabled, make their own requests, but they never receive your files or text.
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
All Social Media ToolsCaption FormatterTidy social media captions: keep blank lines that some apps collapse, trim extra spaces, move hashtags to the end and check the length.
Social Post PreviewPreview a post in a neutral feed layout, with an optional image and the “…more” cut-off point typical for Instagram, LinkedIn, Facebook and others.
Character CounterCount characters with and without spaces, letters, digits, emoji-aware graphemes and UTF-8 bytes.
Open Graph PreviewPreview a link card from your og:title, og:description and og:image, check image size and text length, and copy the Open Graph tags.
Twitter / X Card PreviewPreview a summary or large-image card for X (Twitter), check text and image guidance, and generate the twitter: meta tags.