Image Resizer
Resize JPG, PNG & WebP images by pixels or percentage — right in your browser. Keep the aspect ratio or set exact dimensions. Your images never leave your device.
Drop a JPG, PNG or WebP image or click
Processed on your device — never uploaded
How it works
Toolasy redraws your image at the size you choose using your browser's built-in canvas, entirely on your device. Resize by percentage to scale, set a target width or height to keep the aspect ratio, or use exact width × height for specific dimensions. Because nothing is uploaded, your photos stay private and there's no upload wait. Need a smaller file instead of smaller dimensions? Try the Image Compressor, or convert iPhone photos with the HEIC to JPG converter.
Frequently asked questions
- How do I resize an image?
- Drop your image, choose how to resize — by percentage, a target width, a target height, or exact width × height — then click Download. The resized image is created on your device and downloads instantly; nothing is uploaded.
- Does resizing keep the aspect ratio?
- Yes, unless you choose Exact W×H. Resizing by percentage, width, or height preserves the original aspect ratio automatically. Exact mode lets you force specific dimensions even if that stretches the image.
- Can I resize PNG and WebP too?
- Yes. This tool accepts JPG, PNG and WebP, and you can keep the original format or convert to JPG, PNG or WebP on the way out.
- Are my images uploaded to a server?
- No. Everything runs locally in your browser. Your image is never uploaded, stored, or sent anywhere — open your Network tab to confirm zero traffic.
- Can I make an image larger (upscale)?
- Yes. Enter a width, height, or percentage larger than the original. Note that upscaling can't add detail, so enlarged images may look softer.
Your privacy
Every image is resized locally in your browser. No file is uploaded, logged, or stored. Open your browser's Network tab while resizing — you'll see zero image traffic.