Free tool No sign-up
Free Bluesky Image Size Guide
Bluesky banners, avatars and post images.
Bluesky’s banner is 3:1 like X’s, and post images show in their own shape. Pick the size, drop in your image, place it and download it.
Profile
Cover and banner
Posts
Bluesky square post
1,080 × 1,080 px · 1:1
Cropped in your browser: your image isn’t uploaded anywhere.
How it works
How to use the Bluesky Image Size Guide
- 1
Pick the size
Every place an image shows on Bluesky, with the size to upload.
- 2
Add your image
Drag it to place it and zoom to fill the frame. Circles and safe areas show where the network crops.
- 3
Download
Get a JPG or PNG at the exact size, ready to upload.
Bluesky sizes
What to know about Bluesky sizes
Recommended uploads: networks scale images down, never up, so start at least this big.
- 1
Banner: 1500 × 500
Phones crop the edges: keep the subject in the middle.
- 2
Avatar: 400 × 400
Shown as a circle.
- 3
Posts
Square, landscape or portrait; up to four images per post.
- 4
Under 1 MB
Bluesky compresses images to stay under 1 MB.
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Bluesky Image Size Guide FAQ
Questions, answered.
What size is a Bluesky banner?
1500 × 500 pixels, 3:1.
Is the Bluesky image resizer free?
Yes, and it works without signing up. Images are cropped in your browser and never uploaded.
What size should Bluesky post images be?
1080 × 1080 square, 1200 × 627 landscape or 1080 × 1350 portrait.
What size is a Bluesky avatar?
400 × 400 pixels, shown as a circle.
How many images can a Bluesky post have?
Up to four.
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