Resize Image — free, private, in your browser

How to resize an image

Changing your image dimensions takes just a few seconds, and everything happens right here in your browser:

1. Add your images. Drag JPG, PNG or WebP files onto the drop zone above, or click Choose images to pick them. You can add as many as you like at once.
2. Choose how to resize. Switch between Pixels (set an exact width or height) and Percent (scale every image by a number like 50 or 200). Keep Lock aspect ratio ticked and the other dimension is calculated for you, so nothing is stretched.
3. Fine-tune the output. Optionally pick an output format (keep original, JPEG, WebP or PNG) and a quality for JPG and WebP. Each image shows its original dimensions and size next to the new ones, with a live preview.
4. Download. Use each image's Download button, or click Download all (ZIP) to grab the whole batch at once — all created on your own device.

Why resize images

• Fit exact requirements. Profile pictures, ID uploads, marketplace listings and forms often demand a specific width and height in pixels — set it precisely here.
• Smaller, faster files. Scaling a huge camera photo down to the size you actually display makes it load quicker on websites and attach without bouncing past mailbox limits.
• Consistent batches. Resize a whole folder of photos to the same width in one go, so a gallery or catalog looks uniform.
• Privacy by design. Because this resizer is fully client-side, sensitive photos and documents never touch a server.

Private and offline by design

Most online "resize image" sites upload your photos to their servers to do the work. This one doesn't. It draws each image to an HTML canvas at the new dimensions and re-encodes it with canvas.toBlob directly in your browser, so your files never leave your device — you can even disconnect from the internet after the page loads and it still works. For heavier, repeatable jobs on Windows — OCR on scans, editing, merging and splitting PDFs, or processing folders of files in bulk — try Kaizen OCR & PDF.

Frequently asked questions

No. The resizing happens entirely inside your browser using the HTML canvas and the canvas.toBlob method. Your images never leave your device and are never sent to any server, so private photos and documents stay completely private.

Leave the Lock aspect ratio box ticked, which is the default. Type a new width and the height is calculated automatically (or vice versa), so the image never looks stretched or squashed. Untick it only when you deliberately want to force exact width and height values.

Yes. Switch the mode to Percent and enter a number like 50 to make every image half its original size, or 200 to double it. Pixel mode lets you set an exact target width or height instead, which is handy for fitting a specific upload requirement.

Yes — completely free and unlimited, with no signup and no watermarks. It runs locally in your browser, so you can resize as many images as you like.