Image Resizer
Resize any image to exact pixel dimensions with width and height fields, lock the aspect ratio or override it, and download the result. All scaling happens on canvas inside your browser.
How to use the Image Resizer
- Select or drop the image you want resized.
- Enter the target width, and let the height auto-adjust to keep proportions.
- Unlink the fields if you need a specific width and height pair.
- Press resize, preview the result, and download it.
When the Image Resizer is useful
- Fitting photos to platform requirements for avatars and banners.
- Scaling screenshots for documentation without emailing multi-megabyte files.
- Preparing web-optimized sizes for responsive images.
- Creating thumbnails from full-resolution originals.
How the Image Resizer works
Resizing draws your image onto a canvas at the requested dimensions and re-encodes it, which is also why it stays fast for large files. When the ratio is locked, the height recalculates from the original proportions, preventing squashed or stretched output. The browser applies its own smoothing during scaling, giving good quality on both downscales and modest upscales. Everything stays local.
Limits to keep in mind
Upscaling beyond the original resolution cannot invent detail; enlarged images soften, so prefer downsizing where possible.
Frequently asked questions
How do I keep my image from looking stretched?
Keep the aspect ratio locked so height follows width proportionally.
Does resizing reduce file quality?
Re-encoding applies mild quality cost; combine with the Image Compressor for best size results.
Is my image uploaded during resizing?
No. The resize runs on canvas in your browser, and the file never leaves your device.
Last reviewed: October 2026.