Threads Image Size and Specs 2026
Every upload spec at a glance, with sources.
Threads Image 2026: files up to 8 MB, caption up to 500 characters, up to 1 hashtags.
All specs
| Minimum resolution | 320 px width |
|---|---|
| Maximum file size | 8 MB |
| File types | JPEG, PNG |
| Caption limit | 500 characters |
| Hashtag limit | 1 |
Notes (from the sources, in English): Threads API: JPEG and PNG, 8 MB max, width 320 to 1440 px, aspect ratio limit 10:1, sRGB. Carousels: 2 to 20 items (images and videos). 500-character post plus optional 10,000-character text attachment (since September 2025). One topic tag per post.
Work out bitrate and file size with the file size calculator. Check caption length with the character counter.
Changes in 2025 and 2026
- 2025-09-04: text attachments of up to 10,000 characters can be added to a post (base post limit stays 500).
Sources
- Threads API overview, media specifications (Meta for Developers) (official)
- Tag a topic in your post on Threads (Instagram Help Centre) (official)
- Attach Text to Your Threads Posts (Meta Newsroom, 2025-09-04) (official)
Checked: 2026-10-13. Confidence: official. All platforms in one table: social media video specs 2026
Other Threads formats
FAQ
What is the maximum file size for a Threads Image?
Up to 8 MB.
How long can the caption of a Threads Image be?
Up to 500 characters.
How many hashtags can a Threads Image have?
Up to 1.
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