Compress images

Smaller pictures, same look

Phone photos weigh 3 to 8 MB each, far more than most websites, forms and messages need. This tool shrinks them in two ways:

• Quality: pictures are saved again as JPEG or WebP. Medium is the sweet spot, usually 70 to 90 % smaller with no difference you'd notice on a screen; High keeps more detail, Low is for tight limits.
• Max size: most phone photos are 4000 pixels wide or more. Scaling the longest side to 2560 px (or 1920 for messages) cuts the file a lot and still looks sharp on any screen.

Format Auto picks JPEG for photos and WebP for pictures with a transparent background, since JPEG can't keep transparency. You can also force JPEG, WebP or PNG.

If a picture can't be made smaller, you get the original back, so you never end up with a bigger file. Up to five pictures at once.

Private

Compression runs in your browser. Your photos aren't uploaded, so there is no sign-up and no daily limit.

Each picture is decoded by your browser in a Web Worker, with phone orientation applied (iPhone HEIC photos through libheif), optionally scaled down so its longest side fits the maximum, and encoded again with the browser's own JPEG or WebP encoder at the chosen quality (85, 72 or 55 out of 100). Transparency is detected by sampling the picture. The new file replaces the original only if it is smaller.