Image Resizer
Resize images to any dimension
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Avatar selected — upload an image to apply it.
Drag & drop files here
or browse to upload
Supports PNG, JPG, WebP up to 20MB
Processed in your browser - your file never leaves this device.
About this tool
A 512 by 512 avatar is a safe size for app profiles, forums, Discord, Slack, Gravatar and game accounts. It is large enough to stay crisp on high-density screens and when an app shows a bigger profile view, and small enough to upload anywhere. The preset makes that square, sized to stay sharp on high-density screens while loading instantly in a list.
How to use this tool
- Pick a photo or logoChoose a clear image that will be recognisable in a member list.
- Centre itDrag so the face or logo sits in the middle - most apps crop avatars to a circle.
- Upload everywhereDownload once and use the same avatar on Discord, Slack, forums and Gravatar.
One avatar for many platforms
Most platforms accept a square image and display it as a circle or rounded square, scaled down. Starting from 512 x 512 gives every platform enough pixels. Keep the subject centred with some padding so circular and rounded masks both look right.
One avatar across apps and communities
Discord, Slack, forums, Gravatar and game accounts all crop avatars into circles or rounded squares, and show them at small sizes in member lists and chats. A centred face or a bold logo on a plain background works on all of them.
Using the same 512 x 512 image everywhere makes you easy to recognise across communities, and the size is large enough for profile views on high-density screens.
Key features
- One avatar size that works across most apps and communities.
- Crisp on high-density screens, yet small enough to upload anywhere.
Common uses
- Discord and Slack profiles.
- Forum and community avatars.
- Gravatar for comments and Git commits.
Tips for better results
- Centre the subject with padding.
- Use one avatar everywhere for recognition.
- Keep backgrounds simple.
Mistakes to avoid
- Non-square images that get cropped oddly.
- Detail at the corners.
Frequently asked questions
512 x 512 pixels is a safe square size for most platforms.
Often - keep the subject centred.
Yes - both accept square images of this size.
Sized to stay sharp on a high-density screen while remaining small enough to load instantly in a list.
Drop it onto this page. The Avatar preset is already selected, so it resizes straight to 512 x 512 pixels and shows the crop before you download.