Threads image sizes
The image rules Meta publishes for Threads, what happens to a photo that's too wide or too narrow, and a resizer that makes one that fits.
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Where it goes
- Up to 8 MB
- JPEG, PNG
- We make 1,440 px wide at most
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JPEG, PNG, WebP or GIF. It stays on your device. Nothing's uploaded.
Your image
Your resized image shows up here.
Shape
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Describe the image for people who can't see it. Copy it into the post with the image. Threads doesn't say how it counts, so we count the strictest way.
Threads image sizes at a glance
Meta documents two placements for Threads: a post's image and a carousel. It doesn't publish a profile photo or link preview size, so we don't guess one.
| Placement | We make | Shape | File size | Formats |
|---|---|---|---|---|
| Post image | 1,440 px wide at most | Not documented | 8 MB | JPEG, PNG |
| Carousel | 1,440 px wide at most | Not documented | 8 MB | JPEG, PNG |
1,440 px is as wide as it gets
Threads scales any image wider than 1,440 px down to 1,440, and stretches anything narrower than 320 px up to 320. So a 4,000 px photo only costs you upload time: Threads throws the extra pixels away. Under 320 px, it'll look soft.
The tallest or widest shape it takes is 10:1. Inside that, Meta doesn't say how the feed crops a photo, so the resizer keeps your image's own shape unless you pick another one.
File size and format
Each image can be up to 8 MB, as a JPEG or PNG, the two formats Meta calls officially supported. We read 8 MB as 8,000,000 bytes, the stricter way to count it, and aim a little under that.
Carousels
A carousel holds 2 to 20 items: images, videos or a mix. Every image in it follows the single-image rules, so 8 MB, JPEG or PNG, and 1,440 px wide at most.
Meta doesn't document how a carousel handles images of different shapes. If you want a tidy row, give them all the same one: pick Square, Portrait or Landscape in the resizer and run each image through it.
Alt text on Threads
Each image takes alt text of up to 1,000 characters through Meta's API. Meta doesn't say how it counts them, so the resizer counts the strictest way: most emoji count as two.
Say what's in the picture and why it's in the post. Write it in the box beside the resizer, copy it, and paste it in when you add the image to your post.
Why we make these sizes
- Post image and Carousel. Threads scales anything wider than 1,440 px down to 1,440, so a wider file only adds bytes. Keep your own shape: Meta doesn't document a feed crop.
Does Shaflex check my images for Threads?
Yes. Shaflex checks every image you attach against Threads' media rules as you add it, along with the rules of the other networks the draft goes to. If a network can't take an image, the post still goes to the networks that can, with a note saying why. The image editor works inside your draft: crop to a network's size, put a screenshot in a device or on a backdrop, and blur what's private.
See how Shaflex schedules for Threads, how one draft goes to every network, and what the free plan includes.
Where these rules come from
Each one is from the network's own documentation, help pages or source code. We last checked them on .
More free tools
Each one runs in your browser too.
- Threads
Threads character counter
Threads' 500, counted the way the app counts, with the stricter count Meta's API docs use for emoji alongside.
Open it - Image tool
Image resizer
Crop, pad and compress an image for any network and placement, right in your browser.
Open it - Image tool
Carousel maker
Turn a long post, a thread or a list into a carousel: a cover, a slide per point and a closing slide, for Instagram, TikTok, LinkedIn or Facebook.
Open it
Questions
What size should a Threads image be?
Up to 1,440 px wide. Threads scales anything wider down to 1,440 px and enlarges anything narrower than 320 px, so a JPEG or PNG 1,440 px wide and under 8 MB is as good as it gets.
What's the file size limit for Threads images?
8 MB per image, in Meta's Threads API docs. Keep each one under 8,000,000 bytes to be safe.
How many images can one Threads post have?
Up to 20 in a carousel, and you can mix images and videos in it.
Does Threads crop images in the feed?
Meta doesn't document a feed crop for Threads. It takes shapes up to 10:1. If you post something very tall or wide, keep the subject away from the edges.
What size is a Threads profile picture?
Meta doesn't publish one for Threads, so we don't list one, and the resizer doesn't offer a Threads profile photo either.
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