AI tool
One caption, every platform
Paste the caption you wrote for one app. Get a version written and sized for each platform you post to, from X's 280 characters to a full LinkedIn post. Free, no sign-up.
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
Use the one you already wrote, for any platform.
Pick your platforms
All 10 are on to start. Turn off the ones you don't use.
Copy each version
Each one shows its length counted that platform's way. Anything too long shows in red.
Tips
- Links, @mentions and product names are kept the way you wrote them.
- The X version is short on purpose: X counts each link as 23 characters.
- Read each version before you post. AI can get details wrong.
Character limits it writes to
| 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 rewrite instead of posting the same caption everywhere?
Each platform has its own limit and style. What fits on LinkedIn is too long for X, and Google Business Profile posts work better without hashtags.
Is it really free?
Yes. You can use the AI tools 10 times an hour and 25 times a day in total, without signing up. The limit keeps them free for everyone.
Which AI writes this, and do you keep what I type?
It runs on a DeepSeek model through OpenRouter, sent only to providers that keep no copy and don't train on it. We don't store or log what you type. To enforce the free limit we keep a counter tied to a scrambled version of your IP address, and it's deleted within 2 days. Details are in our Privacy Policy.
Can I post these with tenfeeds?
Not yet. tenfeeds is opening platforms one at a time. Join the waitlist and we'll email you when yours open.