Image Resizer
Resize, compress and convert images entirely in your browser. No uploads, no tracking — your images stay on your device.
Click here or drag an image
JPG, PNG, WebP, GIF, BMP, HEIC
Private by design
All resizing, format conversion and compression run locally in your browser. Your images are never sent to a server.
Instant results
See the resized preview immediately as you adjust dimensions, format and quality. No waiting, no queues.
Format & quality control
Switch between PNG, JPEG and WebP, and fine-tune quality to balance sharpness against file size.
Related image tools
More free browser-based tools for your images.
Frequently asked questions
Is this image resizer really free? ▾
Yes. The Convertr.org image resizer is 100% free with no signup, no watermark and no usage limits.
Is my image uploaded to a server? ▾
No. This is a browser-native image resizer. Your image never leaves your device — all resizing, format conversion and quality adjustment run locally in your browser using the Canvas API.
What image formats are supported? ▾
You can open JPG, PNG, WebP, GIF, BMP and HEIC images. Output formats include PNG, JPEG and WebP, depending on what your browser supports.
Will resizing reduce image quality? ▾
Downsizing an image always involves some resampling, but you can control quality with the quality slider for JPEG and WebP outputs. For maximum fidelity, choose PNG output.
Can I maintain the original aspect ratio? ▾
Yes. The aspect ratio lock is enabled by default. Changing width automatically updates height (and vice versa) to preserve the original proportions.