Resize images to any size, in bulk
Need a batch of photos at 1080×1080 for Instagram, or a set of product shots under 2000 pixels wide? Drop them in, pick a mode, and every file comes out at the size you asked for, nothing uploaded.
Four ways to size
Exact dimensions: the image is stretched to the width and height you enter. Use when the output must be a specific pixel count, regardless of aspect ratio.
Fit to box: the image is scaled so it fits inside the width and height you enter, preserving aspect ratio. No cropping, no distortion, the largest dimension wins.
Percentage: scale the original dimensions by a percentage. Halve a 4000-pixel photo to 2000 pixels with one number.
Height only: lock the height and let the width follow the aspect ratio. Useful when a platform demands a specific vertical size but doesn't care about width.
Why resize before uploading
Most platforms compress what you give them. A 20-megapixel photo shrunk to a 1080-pixel square by the platform's own resampler looks worse than one you resized yourself with a high-quality algorithm, because the platform optimises for speed, not quality.
Resizing also shrinks file size. A 10 MB photo at 4000 pixels wide is often 500 KB at 1500 pixels wide, with no visible difference on screen. Smaller files upload faster and cost less to serve.
Nothing is uploaded
Every pixel is processed in your browser tab. The file is decoded, resized, re-encoded and handed back as a download. There is no server, no account, no upload.
Disconnect from the internet after the page loads and it still works, the service worker precaches the entire tool.
Quick questions
Does resizing reduce image quality?
Only if you enlarge. Shrinking an image discards pixels, but the browser's high-quality resampler keeps edges sharp. Enlarging adds pixels the camera never captured, use the upscaler tool for that.
Can I resize several images at once?
Yes. Drop as many as you like and they are all resized in one pass. Each output keeps the original filename with the new dimensions appended.
What output formats are supported?
JPG, PNG and WebP. Pick one explicitly or leave it on Auto to keep the original format where possible.
Are my images uploaded?
No. Everything runs in your browser. Disconnect from the internet and the tool still works.
Converters
Start here if your files still need converting before you use this tool.