Social Media Character Limits
Every platform caps the length of a single post differently. Here's the quick reference, with detailed pages on what happens when you go over, how each platform handles threading, and how to cross-post between platforms with different limits.
| Platform | Character limit | Native threading |
|---|---|---|
| X | 280 | Yes |
| Bluesky | 300 | Yes |
| Threads | 500 | Yes |
| Mastodon | 500 | Yes |
| 800 | No | |
| Discord | 2,000 | No |
| 3,000 | No | |
| Slack | 4,000 | No |
| Telegram | 4,096 | No |
| Tumblr | 4,096 (Ferryman limit) | No |
| Substack | 10,000 | No |
| 63,206 | No |
Detailed character limit pages
- X character limit280 characters per post (with notes)
- Bluesky character limit300 characters per post
- Threads character limit500 characters per post
- Mastodon character limit500 characters per post (with notes)
- Pinterest character limit800 characters per post (with notes)
- Discord character limit2,000 characters per post (with notes)
- LinkedIn character limit3,000 characters per post
- Slack character limit4,000 characters per post (with notes)
- Telegram character limit4,096 characters per post (with notes)
- Tumblr via Ferryman character limit4,096 characters per post via Ferryman (with notes)
- Substack character limit10,000 characters per post (with notes)
- Facebook character limit63,206 characters per post
Cross-post without worrying about limits
Ferryman automatically splits long posts into native threads where supported. Tumblr requires a single post within Ferryman's 4,096-character integration limit and does not support threads, quote posts, or reposts. Free to try.
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