Runs in your browser
Will your caption fit everywhere?
Paste one caption and see right away if it fits all 10 platforms, counted the way each platform counts. Free, no sign-up, and nothing you type leaves your browser.
Coming soon
Soon: post it everywhere at once.
tenfeeds isn't open yet. When it opens, you'll be able to:
- Upload once, pick your platforms, and post now or schedule it.
- See which platforms your caption is too long for before anything goes out.
- Post from the dashboard, or have your AI agent draft posts for you to check.
Join and we'll email you when tenfeeds opens, only about tenfeeds. Watch the 1-min demo
How it works
How to use it
Paste your caption
Type or paste the caption you plan to post. It stays in your browser.
Check every platform
Each row shows how much of that platform's limit you've used, counted its own way.
Fix what doesn't fit
Shorten the ones marked too long, and put your hook before the point where captions get cut off.
Tips
- X counts every link as 23 characters and most emoji as 2, so a caption can fit everywhere except X.
- Bluesky counts characters the way you see them, so a flag emoji counts as one.
- Threads counts most emoji as 4 characters.
- Instagram shows about the first 125 characters before "more". Put the reason to keep reading there.
- Instagram allows 5 hashtags per post now, down from 30.
Character limits by platform
| Platform | Limit | Counted as | Also |
|---|---|---|---|
| TikTok | 2,200 Caption | Characters | Photo post title: 90 source |
| 2,200 Caption | Characters | 5 hashtags max, about 125 show before "more" source | |
| YouTube | 5,000 Description | Bytes | 60 hashtags max, Title: 100 source |
| X | 280 Post | Weighted (links 23, emoji 2) | source |
| 3,000 Post | Characters | about 150 show before "more" source | |
| 63,206 Post | Characters | source | |
| Threads | 500 Post | Characters (emoji count as 4) | 1 hashtags max source |
| Bluesky | 300 Post | Characters as you see them | source |
| 800 Description | Characters | about 40 show before "more", Title: 100 source | |
| Google Business Profile | 1,500 Update post | Characters | source |
Checked October 12, 2026 against each platform's help pages and developer docs. Limits change, so we recheck them regularly.
FAQ
Common questions
Why does X say my caption is longer than it looks?
X weighs characters. Links count as 23 no matter how long they are, and emoji and many non-Latin characters count as 2. Standard accounts get 280.
Do spaces and line breaks count?
Yes, on every platform. A line break counts as one character.
How many hashtags can I use?
Instagram allows 5 per post. Threads allows one topic tag. YouTube ignores every hashtag on a video that has more than 60. The others have no hard cap, but a few relevant tags work better than many.
Why is TikTok's limit 2,200 when I've seen 4,000?
The TikTok app allows up to 4,000. Apps that post through TikTok's official tools, like schedulers, can send 2,200 for a video caption (photo posts allow 4,000). We use 2,200.
Is my text saved anywhere?
No. The checker runs in your browser. Nothing you type is sent to us.
Where do these limits come from?
Each platform's own help center or developer docs, checked October 12, 2026. The table below links the source for each one.
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