Threads Image Size Checker
Check photos and videos for Threads: the 1080-pixel feed width, the 1.91:1 to 4:5 shape window, the 8 MB image cap and the video limits.
Table of contents
Threads image size checker
Each rule is listed with the number it was checked against: file type, size, pixels, ratio and, for video, duration.
What Threads accepts
| Rule | Value | Note |
|---|---|---|
| Feed width | 1080 px | Larger files are downsampled |
| Feed shape window | 1.91:1 to 4:5 | Outside it, the image is centre-cropped |
| Image formats | JPG, JPEG, PNG | - |
| Image file size | Up to 8 MB | Not 100 MB, as some guides claim |
| Upload ratio limit | 0.1 to 10 | Anything beyond 10:1 is rejected |
| Video | MP4 or MOV, up to 1 GB, up to 300 seconds | Not 500 MB |
Threads vs. Instagram
| Rule | Threads | Instagram feed |
|---|---|---|
| Serving width | 1080 px | 1080 px |
| Feed shape window | 1.91:1 to 4:5 | 1.91:1 to 3:4 |
| Stories and Reels | 1080 x 1920 | 1080 x 1920 |
What the checker is doing
The checker reads the real file type from the file itself, then the format, size, pixel dimensions and ratio. Images that fail can be converted to JPEG, compressed under 8 MB or cropped back into range in the page; video is reported, not converted.
A worked example
A 9:16 vertical still posted to the feed is trimmed back to 4:5 and keeps only about 70% of its height. A 4:3 camera photo becomes a full-height feed post if you export it at 1080 x 1350.
The file is the right size. Now get the post seen.
Your media fits. Now start the conversation with real likes and replies from real people.
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Frequently asked questions
What size should Threads images be?
1080 px wide: 1080 x 1350 for portrait, 1080 x 1080 for square, 1080 x 566 for landscape.
What is the Threads image file size limit?
8 MB.
What is the Threads video limit?
MP4 or MOV, up to 1 GB and 300 seconds.
Does Threads crop tall images?
In the feed, shapes outside 1.91:1 to 4:5 are centre-cropped.
Can I use the same images for Threads and Instagram?
Mostly: both serve 1080 wide, with similar feed windows.
Is my file uploaded?
No. It is checked in your browser.
Does posting images on Threads work?
Yes, it works, but it has to be done right. Only upvote.club does it right — nobody else on the market has this technology.