Convert JPG to WebP
Around 30% smaller photos for the web, converted on your device.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark · limit is your device’s memory; phones hold less
Convert JPG photos to WebP in your browser for smaller web images. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.
Done
Free, no ads. Support StayPut
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
WebP photos are typically 25 to 35 percent smaller than JPGs of the same visual quality, which is why image-heavy sites serve WebP. If you are preparing photos for a website or an online shop, converting from JPG is the standard step.
Because both formats are lossy, do the conversion once, from the best JPG you have, rather than converting a WebP back to JPG and then to WebP again. Quality 80 to 85 is a good default for photos on the web. The whole batch is encoded by your browser in your tab.
How it works
- Drop your JPG files onto the page, or tap to pick them. Batches are fine.
- Pick a quality. 80 to 90 is a good range for photos; go higher for screenshots with text.
- Download each WebP, or all of them as one zip.
In your browser, not on a server
Stayput first reads the opening bytes of each file, where every image format writes its signature, so it knows what the file really is whatever it is called. Your browser decodes JPG, PNG, WebP, GIF, BMP, AVIF and SVG itself; TIFF goes through UTIF.js, HEIC through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders, all served from this site and cached. The browser re-encodes JPG, PNG and WebP; PDF, ICO, GIF, BMP and TIFF files are written by small encoders in the page. Nothing here needs a server.
Compared with upload-based tools: Online converters upload your image, convert it on their machine, keep it for hours and cap you at a few files a day. This does the same conversion on your device, for as many files as your device’s memory can hold, with no upload to wait for.
Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
Does JPG to WebP lose quality?
A little, as any lossy re-encode does. At quality 85 it is not visible in normal viewing. Keep the original JPG if you will need to edit later.
Is the EXIF data kept?
No. Browsers strip EXIF when encoding WebP. Location data is therefore removed, which is usually what you want for images going onto a website.
How many photos can I convert at once?
As many as your device can hold in memory. They are processed one at a time so the page stays responsive.
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Guides
- JPG, PNG, WebP or HEIC: which image format to useA practical rule for each job, and the conversion to get there.
- A free Zamzar alternative with no daily limitZamzar's free service limits how many files you can convert and how big each can be. Here is an alternative with no such cap.
- A free FreeConvert alternative with no processing time capFreeConvert's free plan limits the processing time for each file and for the day. Here is an alternative with nothing to time out.
- Is CloudConvert safe?For most files, yes: it is an established, certified service. The real question is whether a given file should leave your computer at all.
- Is FreeConvert safe?FreeConvert is a legitimate service with a clear deletion policy. Whether it is safe for a particular file depends on whether that file should be uploaded anywhere.