Free Threads tool
Threads Post Splitter
Threads caps every post at 500 characters, so anything longer becomes a chain. Paste your text and get the chain back, broken on sentences rather than at exactly 500.
Last updated: 2026-08-03
Threads holds 500 characters per post and does not negotiate. That is three or four sentences, room for one clear idea, and the reason longer thoughts on Threads are published as a chain of replies rather than as a single block.
A chain only reads well if the breaks land somewhere deliberate. Cut at exactly 500 characters and the first post ends mid-clause, which reads like a truncation bug rather than like pacing. This splitter works in sentences and paragraphs instead, so each post ends where a thought ends.
Links are worth watching here. Threads counts a URL as every character it contains, unlike X which charges a flat 23, so a long tracking link can spend a fifth of a post before you write anything. Shorten it first. Nothing you paste is uploaded or stored.
0 characters0 posts500 per post on Threads
Links are counted in full on Threads, every character of the URL.
The prefix spends characters like any other text, so it is reserved before the split. A single post is never numbered.
Your thread for Threads
Paste your draft above and it appears here as numbered posts, each one packed with whole sentences and measured against the 500 characters Threads allows. Nothing is uploaded and nothing is stored.
Breaks land on sentence boundaries, and paragraph breaks in your draft are preferred over sentence ones.
Limits on X and Threads
Both networks cap a single post and expect anything longer to become a chain. The difference is what a character costs: X rewrites links and charges a flat rate for them, Threads charges every character of the URL as written.
| Network | Tier | Limit per post | What that means in a chain |
|---|---|---|---|
| X (Twitter) | Standard account | 280 chars | Every link counts as 23 characters no matter its length |
| X (Twitter) | Premium account | 25,000 chars | A standard post never folds. Premium posts longer than 280 characters collapse behind a "Show more" toggle in the timeline. |
| Threads | Every account | 500 chars | Each post in a chain gets its own 500 characters, so longer thoughts are split across replies rather than stretched. |
Limits verified 2026-07-31. Threads has no classic hashtag block: a post carries a single topic tag, and its text is charged against the same 500 characters.
Thread numbering conventions
Numbering is a reading cue, not a formality: it tells someone how much is left before they decide whether to start. It is also plain text, so whichever style you pick is charged against the same limit as your sentences.
1/5 style
The default. Readers can see how much is left before they commit, and anyone landing on post 4 knows there are three above it.
1/ style
For threads you might extend later. Nothing promises a length, so adding a post the next morning does not make every earlier number wrong.
No numbering
When each post has to stand alone, for example if you expect individual posts to be reshared out of context. You lose the reading cue.
The cost is small but it is paid on every post. On X a "12/14 " prefix takes 6 characters off all 14 posts, which is 84 characters of thread gone. The splitter works that reserve out before it packs, and it drops numbering entirely when your text fits in one post.
Threads thread tips
- Make the first post work alone. The feed shows the opener and folds the rest of the chain behind it, so a post that only makes sense after post two will not get a reader to post two.
- Shorten links before you paste them. Threads charges the full length of a URL, so a 90 character tracking link is nearly a fifth of a post.
- One topic tag per post, and it spends characters like any other text. There is no Instagram style tag block on Threads to fall back on.
- Space the chain with paragraph breaks in your draft. The splitter starts a new post at a paragraph boundary whenever the next sentence will not fit, which usually matches where you would have broken it yourself.
- Do not paste a 2,200 character Instagram caption and hope. Write for 500 and expand for Instagram, rather than letting something truncate the same text in two different places.
- Publish the chain as replies to your own post so Threads groups it. Posting the parts separately scatters them through the feed.
Frequently asked questions
Does the numbering count against the 500 character limit?
Yes. Threads treats "2/6 " as ordinary text, so it comes out of the same 500 characters. The splitter reserves room for the widest prefix in the chain before packing, then repacks if the numbering changed how many posts you need.
How many characters can a Threads post have?
Five hundred, including spaces, emoji, links and the topic tag. The limit applies to every post in a chain individually rather than to the chain as a whole, so a six post chain gives you 3,000 characters in total.
How do links count on Threads compared to X?
Threads counts a URL as every character it actually contains. X is the exception: it rewrites links through t.co and charges a flat 23 characters however long they are. Switch this tool to X and it applies that 23 character weighting instead.
Is my text uploaded or stored anywhere?
No. The chain is built in your browser, nothing is sent to a server, and nothing is saved. No account, no email step.
How long should a Threads chain be?
Five to ten posts covers most subjects. Threads readers move faster than blog readers, and a chain that runs past fifteen posts usually wants to be a short chain pointing at something longer.
Can I split the same text for Instagram instead?
Instagram does not chain, it just gives you 2,200 characters in one caption, so splitting is the wrong tool there. Use the character counter to check the caption fits and to see where the "... more" fold lands.
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