Bluesky Banner Maker
Type your name or a short line, add your photo, and download a banner shaped for your Bluesky profile. It runs in your browser, adds no watermark, and needs no account.
Preview at 1500 × 500.
Auto picks the biggest size that fits. Choose a number for exact control, from 12 to 600 px.
Your photo stays on this device. It is never uploaded.
A short video ad plays first, and your download starts as soon as it ends. That is how this tool stays free.
Bluesky banner size
| Aspect ratio | 3:1 (wide and short) |
|---|---|
| Common upload size | 1500 × 500 px. Some guides suggest 3000 × 1000 px for sharper screens. |
| File type | JPG or PNG |
| File size | Keep it under about 1 MB. Bluesky compresses larger images. |
| Crop behavior | Your profile picture covers the bottom-left corner, and phones trim the sides. |
Bluesky does not publish one official pixel size, which is why guides disagree. The shape is what matters: keep it 3:1 and your banner will fit.
How to make a Bluesky banner with your photo
- Type your name, handle, or a short line about what you post.
- Pick a background. Then choose a photo and set it to Round photo on the right. That keeps the bottom-left corner, where Bluesky puts your avatar, clear.
- Leave the file format on JPG. The tool lowers the quality automatically if it needs to, so the file fits under the 1 MB limit.
- Click Download Bluesky banner. A short video ad plays first, then your file downloads.
- On Bluesky, open your profile, choose Edit profile, tap the banner area, and pick the file. Menus change now and then, but the banner is always inside Edit profile.
Design tips for a Bluesky banner
- Put the text in the middle. Keep the central 60 percent of the width for anything important, because phones crop the edges.
- Keep faces and words out of the bottom-left. Your avatar sits on top of that corner.
- Use high contrast. Bluesky profiles often appear small in feeds and hover cards, so pale text on a pale background disappears.
- Say what you post about in a few words. A banner that reads "Astronomy photos, weekly" gives a visitor a reason to follow.
Frequently asked questions
What size is a Bluesky banner?
It is a 3:1 image. The most common upload size is 1500 × 500 pixels. This page exports exactly that, and you can open the safe zone guide to see where text stays visible.
Why does my Bluesky banner look blurry or fail to upload?
Bluesky limits image files to roughly 1 MB and compresses anything bigger. A PNG with a photo in it can easily pass that. The JPG option on this page shrinks the file automatically to stay under the limit.
Can I use the same banner on X or Mastodon?
Yes. Both use the same 3:1 shape. Make it here once and reuse it, or open the X header maker or the Mastodon header maker for their exact settings.
Do I need to sign up or pay?
No. There is no account and no watermark. A short video ad plays before the download, and that is what keeps the tool free.