About this tool
Resize to Max Dimension is the fastest way to downscale a large photo. Set a maximum pixel size — say 1920 or 2048 — and the tool proportionally scales the image so neither side exceeds that value.
How it works
- 1Upload your image and enter your maximum dimension in pixels.
- 2If the image already fits, a banner confirms no resize is needed.
- 3Otherwise the tool scales it so the longest edge exactly equals your limit.
- 4Choose PNG, JPEG or WebP output and download.
Common use cases
- ✓Preparing images for website upload limits
- ✓Reducing file size before email
- ✓Standardising asset libraries
- ✓Fitting images into CMS restrictions
Privacy first. Resize to Max Dimension runs entirely inside your browser using the HTML5 Canvas API. Your images are never uploaded to any server, stored anywhere or shared with third parties. Everything happens locally on your device.
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