threadsUnicode code points
Threads post limits and media specs
Every number below is the one our publishing engine enforces before a Threads post goes out, with the source it came from and the date we last read it.
Text[text]
| Max length | 500 Unicode code points |
|---|---|
| Counting | Counted in Unicode code points: one plain character is one, and a link costs its full length. |
Media
| Constraint | Images[image] | Video[video] |
|---|---|---|
| Per post | 20 | 1 |
| Formats | .png, .jpg, .jpeg | .mp4, .mov |
| Max size | not published | not published |
| Max length | - | 5 min |
| We publish it | yes | yes |
We publish text, images and video here; PDF documents we do not deliver to Threads yet. A PDF deck degrades here into up to 20 slide images.
Mentions
| Syntax | @handle |
|---|
Plain @handle links natively.
The guidance our own agent carries for Threads, verbatim.
Hashtags
- At most ONE hashtag per post - Threads enforces it.
Questions
- How long can a Threads post be?
- 500 characters. Counted in Unicode code points: one plain character is one, and a link costs its full length.
- How many images can one Threads post have?
- Up to 20: .png, .jpg, .jpeg.
- What video does Threads accept?
- 1 video per post: .mp4, .mov, up to 5 min.
- How do you tag an account on Threads?
- Write @handle. Plain @handle links natively.
- How many hashtags can a Threads post have?
- At most ONE hashtag per post - Threads enforces it.
Sources, verified 2026-07-21
Each citation names where the number came from. Anything we could not confirm in an official document is marked, because a number nobody will stand behind should look different from one that is.
- [text]500 chars, Meta graph docs via 3pverified 2026-07-14
- [image]carousel 2-20 items official; single image otherwise (2026-07-14, LOW on bound)
- [video]media_type=VIDEO container + video_url, status pollverified 2026-07-21