Social Media Character Limits
Paste a post once and see, side by side, whether it fits X, Instagram and LinkedIn — before you publish and find out it does not.
Each platform counts differently, and the difference is what trips people up. A post that fits LinkedIn easily may be far too long for X, and a link that looks short in your draft can eat far more of an X post than you expect, because X counts every link the same way. Checking each platform separately is slow and error-prone, which is why this page checks all four fields at once: X posts, Instagram captions, Instagram bios and LinkedIn posts.
The counts are shown as characters used, characters remaining, and a plain fits or does-not-fit verdict for each field. If a post is over on one platform, you can trim it for that platform without rewriting it for all of them. Limits checked October 2026; platforms change their rules, verify in the platform before publishing.
Two warnings belong at the top. First, X Premium long posts are not the standard limit checked here: this page checks the standard 280-character limit. Second, hashtag counts are not shown as a hard limit here, because sources disagree on Instagram hashtags.
Text is processed only in the browser and is never uploaded to a server. Nothing you paste leaves this device.
All four fields are checked below either way; this choice only highlights one row.
Paste a post to see its limits.
Results
Limits checked October 2026; platforms change their rules, verify in the platform before publishing. X Premium long posts (25,000 characters) are not the standard limit checked here.
How to use
- Paste your post into the box, links included, exactly as you plan to publish it.
- Read the four rows: characters used, characters remaining or over, and fits or does-not-fit for each field.
- If a field is over, trim the post for that field; the other fields update as you type.
- Check the URL count: on X, each link counts as 23 characters no matter how long it really is.
- Before publishing, verify the current limit in the platform itself, since limits change.
Frequently asked questions
Why does a link count as 23 characters on X?
X wraps every link in its own short link, and that wrapped link counts as 23 characters no matter how long the original address is. This page applies that rule: each URL in your post counts as 23 characters. A URL here means an address starting with http:// or https:// and running to the next space; trailing punctuation attached to the address is counted as part of it, so check a link that ends a sentence carefully.
Why are Instagram captions and bios different limits?
They are different fields with different rules: a caption can be much longer than a bio. This page checks captions against 2,200 characters and bios against 150 characters, so choose the field you are writing for. A bio that fits as a caption may still be far too long as a bio, and that is the most common surprise in this checker.
What about X Premium long posts?
X Premium long posts allow far longer posts than the standard limit. They are not the standard limit checked here: this page checks the standard 280-character limit that applies without a Premium subscription, because that is the limit most readers and most accounts still face.
Do limits change, and what about hashtags?
Yes. Limits checked October 2026; platforms change their rules, verify in the platform before publishing. Treat this page as a pre-publish check, not as the platform rule itself. Hashtag counts are not shown as a hard limit here, because sources disagree on Instagram hashtags, and a number presented as a hard rule would mislead more than it helps.