Social media character limits in 2026: every platform
September 24, 2026 · 3 min read · By Wavnil
Every social network caps the length of what you publish, and the caps keep moving: TikTok captions grew from 2,200 to 4,000 characters, and since December 2025 Instagram allows no more than five hashtags per post. Here are the limits that apply as of September 2026, and the counting quirks that trip people up.
Character limits by platform
| Platform | Posts and captions | Profile | Worth knowing |
|---|---|---|---|
| X (Twitter) | 280 (up to 25,000 with Premium) | Bio: 160 | Every link counts as 23 characters |
| Caption: 2,200 | Bio: 150 | 5 hashtags max per post or Reel | |
| TikTok | Caption: 4,000 | Bio: 80 | Tools that post through TikTok's API get less room |
| Post: 3,000 | Headline: 220 | Long posts are cut after a few lines | |
| Post: 63,206 | — | — | |
| Threads | 500 | — | — |
| Bluesky | 300 | — | Each emoji counts as one character |
| YouTube | Title: 100 · Description: 5,000 | — | — |
| Title: 100 · Description: 500 | — | — | |
| Mastodon | 500 by default | — | Some servers allow more |
| Title: 300 | — | — | |
| Discord | Message: 2,000 (4,000 with Nitro) | — | — |
| Telegram | Message: 4,096 · Media caption: 1,024 | — | — |
Limits change regularly, so check the platform's own help pages before publishing anything critical.
How platforms count characters
The same text can fit on one network and overflow on another, because not every platform counts the same way.
- Emojis. X counts most emojis as two characters, while Bluesky counts every emoji as one, however it's built.
- Links. X shortens every link and counts it as 23 characters, however long the original URL is.
- Styled letters. The bold, italic or cursive letters made by font generators are special Unicode characters. X counts most of them double, so a styled post fills the 280-character limit faster. Screen readers may also read them letter by letter, so keep them for short highlights.
- Line breaks and spaces. They count too. On Instagram, empty lines can even disappear when you post; the line break generator keeps your spacing.
What people actually see
The hard limit is rarely the one that matters. Most feeds show only the first line or two of a caption before a "more" link — roughly the first 100 to 150 characters, depending on the screen. That's where your hook belongs: lead with the benefit or the question, and keep hashtags and links for the end.
On Instagram, five hashtags is the maximum
Since December 2025, Instagram allows up to five hashtags per post or Reel, down from 30. Extra tags can stop the post from going out or simply be dropped, so choose three to five specific tags that describe the post rather than a long list; our hashtag generator gives you ideas to pick from, and our guide to the Instagram hashtag limit explains how to choose them. On TikTok and X there is no separate cap beyond the caption length, but a few relevant tags still read better than a wall of them.
Write once, adapt per platform
A caption that works on LinkedIn will be cut on X and look thin on Instagram. A simple routine:
- Write the full version first, for the platform with the most room.
- Cut a short version (under 280 characters) for X and Bluesky.
- Check each version with a character counter, which shows every platform's limit side by side.
In Wavnil you write a post once, then adjust the text for each channel before it's scheduled, so each network gets a version that fits.
Try it
Paste your next caption into the free character counter or word counter to see where you stand — and when you're ready to publish everywhere at once, start a 7-day free trial of Wavnil.