Resize images — bigger or smaller

Set an exact width and height or scale by percent, for one picture or many. Aspect ratio is kept unless you say otherwise.

Free forever · Runs on your device · 0 bytes uploaded

Choose images or drop them here · never leaves this device

Width (px) Height (px) Or scale (%) Keep aspect ratio Save asQuality 92%

Slow or not working? Report it on GitHub

How to resize Image

Add one or more images.
Enter a new size or a percentage.
Click “Resize images” and download the result.

Also good for

resize image to exact pixels
change photo dimensions
resize photo for passport or visa
bulk resize images
enlarge or shrink an image

Private by design — and you can check

Your files are never uploaded, because there is nowhere to upload them to.

No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.

Frequently asked questions

Are my files uploaded anywhere?

No. Fizzdoc does the work inside your browser tab, using open-source engines compiled to WebAssembly and JavaScript. Your file is read from your device, processed locally, and the result is saved straight back to your device. You can check this yourself: open your browser’s developer tools, go to the Network tab, and run a job — no request carries your file.

Does enlarging an image add detail?

Enlarging makes the picture bigger with smooth, high-quality scaling, but it cannot invent detail that was not captured. It is ideal for meeting minimum-size requirements.

Is Fizzdoc free?

Yes, and it stays free: no sign-up, no watermark, no daily limit and no premium tier. Fizzdoc is open source under the Apache-2.0 license, so anyone can run their own copy.