ShapelessAI← All toolsfreeno login500 Unicode code pointsVerified by Tal Weiss
Threads character counter
Counts the way Threads counts, and shows you the exact text that gets cropped. Nothing you type or attach leaves your browser.
Counted in Unicode code points: one plain character is one, and a link costs its full length.
Nothing you type or attach leaves this tab - no upload, no account, no server.
What actually costs characters on Threads
500 characters, counted as code points, and one hashtag. The hashtag rule is the one that catches people: Threads enforces a single tag per post, so the block of tags that works on Instagram is a rejected post here even though the two run on the same account. A link costs its full length, and at 500 characters a long URL is a tenth of the post.
Three posts Threads cuts
- A tag block copied from InstagramA caption ending in five hashtags.Rejected. Threads takes one hashtag per post, and the other four have to become words.
- A thought that wanted to be a LinkedIn post900 characters of argument.400 over. Either it is cut to 500 or it becomes two posts, and the second post is read by a fraction of the first.
- Two imagesA post with a before and an after.One of them publishes. Threads supports carousels, but our adapter publishes a single image today, so the pair has to be one composed frame.
Only on Threads
- At most one hashtag per post - Threads enforces it.
- 500 characters, the same ceiling as a Mastodon default and a fifth of an Instagram caption, on an account shared with Instagram.
- Our adapter publishes one image per post today, though Threads itself takes carousels.
Questions
- Is this Threads character counter free?
- Yes. There is no login and no upload: it runs entirely in your browser, and nothing you type or attach leaves your device.
- How long can a Threads post be?
- 500 characters. Counted in Unicode code points: one plain character is one, and a link costs its full length.
- How many hashtags can a Threads post have?
- One. Threads enforces a single hashtag per post, which is the rule that catches people moving a caption over from Instagram, where 30 are allowed. The other tags have to become words in the 500 characters you have.
- What happens if a Threads post goes over the limit?
- Threads crops or refuses it. The counter marks the exact tail that would be lost, so you can cut the right words instead of guessing.
Where these numbers come from: our sourced Threads spec page, every figure carrying its citation and the date we last checked it.
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We built these because our own agents count against exactly these limits before they publish. Let them write the post too.