How to compress images
Drop your JPG, PNG or WebP pictures on the box above. Each one is made smaller straight away, usually by half to four fifths, and keeps its name and format. Drag the line on the picture to compare, then download one or all of them as a ZIP.
Drop the pictures
As many as you like, from a computer or a phone. Pasting a screenshot works too.
Check them
Pick a row to see that picture before and after, with the line between the two. Balanced suits most pictures; change it and every picture is made again.
Download
Use the button on a row for one picture, or Download all as ZIP with every name kept. The arrow beside it picks the file type.
What happens to each format
| Format | How it is made smaller |
|---|---|
| PNG | The colours are reduced to a palette of up to 256, see-through edges included, with fine dithering so gradients stay smooth. Pictures with few colours keep every one of them exactly. |
| JPG | Saved again with MozJPEG: progressive, with optimised tables and trellis quantisation, which makes files smaller than a camera or editor does at the same look. |
| WebP | Saved again with your browser’s WebP encoder, keeping transparency. |
| HEIC, AVIF, TIFF, PSD | Become JPG, or PNG when they have see-through parts, unless you pick a format. |
| Every format | Location, camera and date details are left out. A picture that would not get smaller is kept as it was. |
Which compression to pick
Balanced is the one to start with: on a normal screen you can’t tell it from the original. Smallest uses half the colours for PNG and lower quality for JPG and WebP: good for thumbnails and email. Best look is for photos you will print or zoom into; a PNG that 256 colours can’t hold closely stays lossless.
For a website, saving as WebP and setting the size to 1920 or 2560 px often saves more than any compression level.
Where do the pictures go?
Nowhere. Online compressors upload each picture to their server; here your browser does the work itself, so pictures never leave your device and there is no limit on how many or how large.
Specs and browser support
| Input | JPG, PNG, WebP, AVIF, HEIC, TIFF, BMP, PSD and camera RAW (its built-in JPEG), up to 50 megapixels each |
|---|---|
| Output | JPG, PNG or WebP, one by one or in a ZIP |
| Not yet | Animated GIFs and animated WebP keep only their first frame |
| Browsers | Current Chrome, Edge, Firefox and Safari, on computers and phones. Safari can’t write WebP: pictures become JPG or PNG there. |
| Price | Free, no account, no limits, no watermark |
Questions
No. They are compressed by your browser, on your device. Nothing is sent to webdave or anyone else.
Not at Balanced on a normal screen. Drag the line over the picture to compare it with the original; if you see a difference, pick Best look.
No limit on the number or the file size. Each picture can be up to 50 megapixels; larger ones can be shrunk with Largest side.
It was compressed well already. Then you get the original back, unchanged. Saving it as WebP or a smaller size can still help.