Compress Image

Phone photos usually shrink by 50–80% with no visible difference. Images that were already compressed hard may shrink only a little, and if compressing would make a file bigger, the original is kept.

75 is the sweet spot for most photos: much smaller files that look the same at normal viewing size. Use 85 or more for printing or photos with fine detail, and 60 when size matters most.

The saving comes from simplifying the image first: millions of colours become a palette of up to 256, chosen to suit that image, with fine dithering to blend them. Transparency is kept, soft edges included, and the result is still an ordinary PNG. Photos are better as JPG or WebP.

It tries quality levels until the image fits under the size you give, keeping as much quality as possible, and only reduces the image's dimensions if even a low quality is too big. The result lands a little under the limit, never over it, and a JPG that's already small enough is kept as it is.

At the size forms show them, yes. 20 KB holds a clear head-and-shoulders photo or signature of about 300 × 400 pixels, 50 KB about 600 × 600 or a readable scanned page, and 100 KB about 1000 × 1000.

Resize the image first with Resize Image to the width and height the form asks for, then compress the result here.

The result is a JPG, the format almost every form accepts, so transparent areas, such as around a signature, are filled with white. Choose WebP under Format to keep them, if the site accepts WebP.

Yes, by default. Removing the date, camera details and location makes files slightly smaller and more private. Tick “Keep photo details” to keep the date and camera; the location is only kept if you ask.

No. Every tool runs in your web browser, so your images are read, changed and saved on your own device and never sent to LabAnvil or anyone else. Once the page has loaded, the tools even work offline.

Free, with no watermark, no daily limit, no account and no cap on file size beyond what your device's memory can handle.