Turn your JPG images into WebP images in seconds. Conversion happens in your browser, so your files are never uploaded to a server.
or drop them here. You can also paste an image (Ctrl+V).
Free · No sign-up · No upload
Files
These sample files are generated on the page. Convert them to try it out, or add your own.
Click “Choose JPG files” or drop them on the page. You can add several at once.
WebP is already selected. Adjust the quality and width if needed.
Click “Convert”, then download your WebP file. With several files, grab everything at once as a ZIP.
WebP is mainly for websites: WordPress has accepted it since version 5.8, and speed tools such as PageSpeed Insights recommend modern image formats. The biggest saving often comes from the pixel dimensions: a 4,000 px wide phone photo rarely needs more than 1,600 to 2,000 px on a web page. Enter that width in the settings before converting.
The conversion compresses an already compressed image a second time. With a very light JPG, WebP at the default setting may save little or even weigh more, so try a lower quality and compare. EXIF metadata, GPS location included, is not carried over, which is rather welcome on a public site. Keep your original JPGs: they are what you should convert again if you change the settings.
The most widely used photo format, introduced in 1992. Its lossy compression keeps files small, and it opens everywhere: phones, computers and social networks. It does not support transparency.
A format created by Google in 2010 to make the web lighter. It compresses with or without loss, supports transparency and animation, and files are often 25–35% smaller than a JPG of the same quality.
The default, 90%, suits most uses. For illustrative photos, a quality of 75 to 85% often makes the file lighter still with no visible difference on screen. Compare two or three settings on a typical image, then use the best one for the rest.
On iPhone and iPad, browsers generally run on Safari’s engine, which can display WebP but not create it. Formatomat therefore does not offer the format and says so on the page. Do the conversion on a computer, with Chrome, Edge or Firefox.
No. The file is read and converted by your browser, on your device. Nothing is sent to a server, and nothing is kept after you close the page.
WebP uses lossy compression, but at the default setting (90% quality) the difference is invisible to the naked eye. You can go up to 100% in the settings.
As many as you like, for free and without signing up. Add them all, then download the results one by one or in a single ZIP. The maximum size depends on your device and browser, with a few caps that protect its memory (for example 20,000 files per archive or 5 million filled cells per workbook: see the home page FAQ); a file over one of them is not converted, and a message says so.
Chrome, Edge and Firefox on a computer, and Chrome on Android, can create WebP files; a browser that cannot refuses the conversion with a message. Safari cannot create them yet, and on iPhone and iPad every browser runs on its engine, so use a computer for this conversion.
Drop to add your files