Bluesky Image Resizer

Resize images for Bluesky posts and profile banners at practical recommended dimensions. Adjust the crop, preview, and download without saving your images.

Target formats

Select at least one format. You can choose multiple formats.

One image, four Bluesky-ready formats.

Upload your image, choose the formats you need, then adjust, preview, and download.

  1. 01

    Upload an image

    Choose a JPEG, PNG, or WebP image up to 10 MB.

  2. 02

    Choose your formats

    Select 1:1, 16:9, or 9:16 Post Images, a 3:1 Profile Banner, or any combination.

  3. 03

    Preview and download

    Review each crop and download the Bluesky-ready images.

Prepare your images for Bluesky

  • Bluesky does not require one fixed Post image ratio; this tool offers square, landscape, and portrait options for different post layouts.
  • Keep important subjects and text away from the edges because Bluesky may crop tall images in some feeds.
  • Profile Banners are horizontal. Keep important content inside the center of the 3:1 crop.
  • Use Adjust before downloading to keep faces, products, and important text inside the crop area.
  • Start with a clear, high-resolution original. Enlarging a small image cannot recover missing detail.

Frequently asked questions

What image sizes does this tool produce?

The tool produces 1200 × 1200 (1:1), 1200 × 675 (16:9), and 1080 × 1920 (9:16) Post Images, plus a 1500 × 500 (3:1) Profile Banner. Bluesky does not require one fixed ratio for Post images, so these are practical starting points rather than platform-mandated dimensions.

Will my image be cropped or stretched?

Your image is resized proportionally and cropped to fit the selected format without stretching. The crop starts centered, so review each preview before downloading.

Can I adjust the crop?

Yes. Choose Adjust beneath a preview, then drag the crop area or use the arrow keys to reposition it. Choose Apply crop to update that format; your other preview stays unchanged.

Which file format will I download?

Images without transparency download as JPEG. Images with an alpha channel download as PNG to preserve transparency, including when the uploaded file is WebP.

Are my images saved?

No. Images are processed in request memory and returned directly to your browser. They are not stored in your account.

What file size limits do the outputs meet?

Post Images are no larger than 2 MB. Profile Banners are no larger than 1 MB.

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