Image tools · batch
A folder of mixed photos, one format out. Pick JPG, PNG or WebP, set the quality, and every photo is converted in a single run, with an optional maximum width for shops and listings that cap dimensions. If instead you need one exact file size, the batch compress page is next door. Converting just one photo, with the direction picked for you: PNG to JPG · JPG to PNG · WebP to JPG · JPG to WebP · PNG to WebP · WebP to PNG.
For a folder in the wrong format: a shoot to JPG, screenshots to PNG, a set to WebP for a website.
Pick your images
Pick the output format
Run and download the results
Drop images on the tray, or click to pick them
JPEG · PNG · WebP · tested with 100 files in one run · they stay on this device
JPG, PNG, WebP and iPhone HEIC photos work here.
The starting settings come from our own tests: WebP at quality 80 is where our test photo beat the biggest converter's result on the same file.
Pick images to begin.
Each photo is decoded by the open-source jSquash codecs, optionally scaled to your maximum width, and encoded in the format you picked, one file at a time. In our tests, 25 images converted in 22.1 seconds total. The sizes are printed per file, before and after, so a conversion that grows a file is visible, never silent.
Converting cannot add detail: a small or soft photo stays small and soft in its new format, and a JPEG converted to PNG gets bigger, not better; the result line shows the bytes either way. AVIF is not offered: our tests measured its encoding at about 50 seconds a photo. Hidden camera and location data (EXIF) does not survive re-encoding, which most people want, but if you need it kept, keep the original. The batch was tested with 100 files in one run; past that, the limit is your device's memory, not a rule of ours.
Any mix of JPEG, PNG and WebP goes in; everything comes out in the one format you pick: JPG, PNG or WebP. PNG output is lossless and ignores the quality setting; JPG and WebP use it. An optional maximum width shrinks big photos as they convert.
Measured in our tests: the test photo as WebP at quality 80 came out at 251,730 bytes, against 435,388 bytes from the biggest converter on the same photo. That is the setting this page starts on.
No. The metered converters ration this job by minutes and operations; this page has no counter to hit, because the work runs on your device and costs this site nothing per photo.
Nowhere. They are read into this page and converted in your browser. Watch the network panel while it works if you want to check.