- A single Threads post: 500 characters. That's nearly 2x Twitter/X's free limit (280).
- You can chain posts into multi-post threads — no overall limit, just 500 chars per post.
- Bio: 150 chars. Display name: 30 chars. Username: 30 chars.
Complete Threads Character Limit Reference (2026)
| Field | Max characters | Notes |
|---|---|---|
| Single post | 500 | Nearly 2x Twitter/X's free limit |
| Reply | 500 | Same as post |
| Multi-post thread | 500 per post, unlimited posts | Chain freely |
| Bio (About) | 150 | Below display name on profile |
| Display name | 30 | What appears at top of profile |
| Username (handle) | 30 | @handle, must be unique |
| Link title (optional) | 30 | Custom CTA for your bio link |
| Direct message | 1,000 | DMs are limited (must follow each other) |
| Quoted post | 500 (your text) | The quoted post adds extra reach |
| Image alt text | 1,000 | For accessibility |
| Video length | 5 minutes | Per upload |
Why 500 Chars (vs Twitter's 280)?
Meta intentionally chose 500 characters for Threads to differentiate from Twitter/X:
- More breathing room for nuanced takes.
- Better-formed thoughts — less truncation.
- Less reliance on emojis/abbreviations to fit.
- Closer to natural language — most thoughts fit comfortably.
X requires Premium ($8-$16/mo) to post longer than 280 chars. Threads gives 500 to all users for free.
How to Make a Multi-Post Thread on Threads
- Write your first post (up to 500 chars).
- Tap + below the post.
- Type the next post — also up to 500 chars.
- Repeat. No upper limit on number of posts.
- Tap Post when done — all posts publish at once as a connected thread.
Multi-post threads on Threads behave similarly to X "thread tweets" — each post can stand alone or be read in sequence.
Optimal Post Length for Threads
| Goal | Optimal length |
|---|---|
| Hook + viral reach | 50-150 chars (punchy) |
| Story / behind-the-scenes | 300-500 chars (full) |
| List post | 200-400 chars (4-7 list items) |
| Hot take | 80-200 chars |
| Reply to viral post | 100-300 chars (sharp value-add) |
Algorithm rewards posts that get read fully. Don't pad — every word should earn its place.
Bio Character Limit (150)
150 characters is tight. Best structures:
- Mission + Context: "Helping SaaS founders 3x MRR through paid ads. Author of @sortingsaas. NYC."
- Title + Stack + Niche: "Senior Backend Eng @ Stripe. Distributed systems, Go, Kubernetes. Open to consulting."
- Personality + What: "Recovering banker, now building fintech. 2 startups, 1 acquired. Newsletter ↓"
Image Alt Text (1,000 Chars)
Threads supports up to 1,000 chars of alt text per image. Use this for:
- Accessibility (screen readers).
- Indirect SEO (Threads doesn't fully index, but Meta's training data may).
- Adding context that doesn't fit in the 500-char post body.
To add: tap "+" → image → "Add description" → up to 1,000 chars.
Video Length on Threads
5-minute max per video upload. Tips:
- Vertical (9:16) videos perform 2x better than landscape.
- Subtitles boost engagement (40% of users mute videos by default).
- Short clips (15-60 sec) get more replays and saves than long ones.
Frequently Asked Questions
How long can a Threads post be?
500 characters per post. Multi-post threads have no overall limit — chain as many 500-char posts as you want.
Why does Threads have a longer limit than Twitter?
Meta intentionally differentiated from X by giving free users more space (500 vs 280). X requires Premium for longer posts.
Can I post longer than 500 chars on Threads?
Not in a single post. Use the multi-post thread feature — chain multiple 500-char posts together.
How long is a Threads bio?
150 characters max. Plus 30-char display name and 30-char optional link title.
Does Threads count emojis as multiple characters?
Most emojis count as 1 character on Threads (different from LinkedIn, where they count as 2-7).
Key Takeaways
- Single post: 500 chars. Reply: 500. Bio: 150.
- Multi-post threads have no overall limit — chain as many 500-char posts as you want.
- Display name: 30. Username: 30. Image alt text: 1,000.
- Video uploads max at 5 minutes; vertical 9:16 performs best.
- Threads' 500-char limit is free for all users (X requires Premium).
Maximize each Threads post with a smart link
Add a UniLink URL to your Threads bio — covers your newsletter, podcast, courses. Track which posts drive the most clicks.