Free Threads tool
Threads Image Resizer
Threads scales your image to fit instead of cropping it, so 1080 x 1350 at 4:5 is about taking up the most room in the feed rather than about avoiding a bad crop.
Last updated: 2026-08-03
Threads is the most forgiving network here for image shape. It accepts anything from a thin banner to a very tall screenshot and scales it to fit the post rather than cutting into it, so nothing you upload gets silently cropped the way it would on Instagram or X.
That changes what resizing is for. On Threads it is not damage control, it is claiming space: a 4:5 image at 1080 x 1350 occupies far more of a scrolling screen than the same picture landscape, and the feed rewards whatever stops the thumb. The 8 MB cap and the 20 item carousel are the other two numbers worth knowing.
The other reason to resize here is legibility. Screenshots of text are the format that travels furthest on Threads, and a full resolution screenshot squeezed into a post is unreadable while a deliberately cropped 1080 x 1350 version of the same thing is not. Everything runs in your browser and nothing is uploaded.
Your image never leaves your browser. The crop and the export both run on your device, and nothing is uploaded to us. HEIC photos straight from an iPhone only decode in Safari, so export a JPEG copy first if yours will not open.
Threads sizes to export
Each one is cropped to fill the frame, centered on the focus point you pick.
Focus point
What every crop stays centered on when the shapes do not match.
Focus: Center
Export format
0.85 is the safe default. Push to 0.95 for images with text, drop toward 0.7 only when you are fighting a tight file size cap.
Re-encoding through canvas also drops the EXIF block, so the file you download carries no GPS coordinates, camera model or timestamp.
Threads image sizes
Every Threads surface that takes a still image, with the size to export at and the ceiling the file has to stay under.
| Surface | Export at | Aspect ratio | Max file size | File types |
|---|---|---|---|---|
| Post image | 1080 x 1350 | 4:5 | 8 MB | JPG, PNG |
| Carousel | 1080 x 1350 | 4:5 | 1 GB | JPG, PNG, MP4, MOV |
Sizes verified 2026-07-31. The file size ceilings are the ones the networks publish, and a scheduling tool sitting in front of them can be tighter still.
JPEG or PNG, and what the quality slider does
The resolution decides whether your image fits the frame. The format and the quality setting decide whether it fits the file size cap, and those are two different problems.
JPEG
Photographs, screenshots of video, anything with gradients
Lossy, and that is the point: a 1080 pixel wide photo lands between 100 KB and 500 KB at quality 0.85, which clears every file size cap on this page with room to spare. The artifacts it introduces hide well in detail and texture.
PNG
Logos, charts, diagrams, screenshots of text, flat color
Lossless, so text stays crisp and flat areas stay flat. The cost is size: the same image can be five to ten times larger than the JPEG, which is what pushes a thumbnail past 2 MB or a Facebook image past 4 MB.
The quality slider only applies to JPEG, and it runs from 0.6 to 1.0. At 0.85, the default here, the difference from the original is invisible at normal viewing size on almost any photograph. Above 0.95 the file grows quickly for very little gain. Below about 0.75 you start to see blocking in skies and other large flat areas, which is the first thing that gives away an over-compressed image.
One thing worth knowing either way: every network re-compresses what you upload. Exporting at maximum quality does not protect the detail, it just means the image is compressed twice. A clean file at the recommended size and a sensible quality survives that better than an enormous one.
Threads image tips
- Export at 1080 x 1350. Threads will not crop you, but 4:5 is the shape that takes the most vertical space in the feed, which is the whole advantage.
- Crop screenshots down to the part that matters instead of posting the full screen. A readable quote beats an accurate but tiny reproduction of your entire display.
- Use PNG for screenshots and JPEG for photographs. Text on a flat background picks up visible JPEG artifacts around every letter, and the 8 MB cap gives a 1080 pixel PNG plenty of room.
- Each carousel item keeps its own aspect ratio on Threads, unlike Instagram. You can mix a portrait photo and a square graphic in one post without either being cut.
- A carousel holds up to 20 items, double what Instagram allows. That is enough for a genuine sequence, but the drop-off after the first few is steep, so lead with the strongest frame.
- Anything wider than 3840 pixels gets downscaled during processing, so exporting above 4K is upload time you do not get back.
Frequently asked questions
What size should a Threads image be?
Threads recommends 1080 x 1350 at 4:5 and caps a post image at 8 MB. It accepts almost any ratio though, from about 1:10 to 10:1, and scales the image to fit the post rather than cropping it, so the recommendation is about how much feed space you occupy rather than about what is allowed.
Is my image uploaded anywhere by this tool?
No. The photo is decoded and redrawn with canvas inside your browser and the result is saved locally. Nothing is sent to us, and nothing reaches Threads until you post it yourself.
Why can this tool not open my iPhone photo?
It is saved as HEIC, which most browsers outside Safari cannot decode. Share a JPEG copy from the Photos app, or switch Settings, Camera, Formats to Most Compatible so your camera saves JPEG in the first place.
Does resizing strip location data from the file?
Yes. Re-encoding from a canvas produces a file with no EXIF metadata at all, so GPS coordinates, camera details and timestamps do not survive the resize. Screenshots rarely carry that data to begin with, but camera photos do.
Will the image lose quality when I resize it?
Scaling down is gentle. The JPEG encode is where quality is spent, so keep the slider at 0.85 or higher, and pick PNG for screenshots and graphics where the encode is lossless and text stays crisp.
Can I use the same image on Threads and Instagram?
Usually yes, because both recommend 1080 x 1350. The difference is in a carousel: Instagram forces every slide into the ratio of the first one, while Threads lets each item keep its own shape. Export a consistent set if the same carousel is going to both.
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