Convert JPG to WebP
Free, unlimited JPG to WebP conversion that runs entirely inside your browser. No upload, no sign-up, no watermark.
Drop your JPG files here
or click to browse · paste with Ctrl+V · files never leave your device
Nothing queued yet. Add as many files as you like — everything runs on your own device.
Nothing is uploaded
Conversion runs in your browser. Your files never touch a server, so there is no copy of them to leak.
No sign-up, no watermark
No account, no email, no daily limit, and nothing stamped across your image.
Batch and folders
Drop a hundred files at once and download the results as a single ZIP.
Works offline
Once this page has loaded you can disconnect entirely and it still works.
This converter turns JPG images into WebP files without uploading anything. The conversion runs inside this page using your own device's processor, so your photos never leave your computer — there is no server copy to worry about, no queue to wait in, and no limit on how many files you convert.
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992. Universal. If a program can open an image at all, it can open a JPG. WebP, by contrast, excellent in browsers, poor outside them. This mismatch is why "save image" so often lands you a file nothing else will open.
Converting to WebP is a page-speed exercise: it typically cuts image weight by a third or more with no visible difference, which shows up directly in Core Web Vitals. Keep the original JPG as your master copy and serve the WebP version.
How to convert JPG to WebP
- Add your JPG files. Drag them onto the box above, click to browse, or paste an image straight from your clipboard. You can add as many at once as you like.
- Adjust the settings if you need to. The defaults suit most images. Raise the quality slider if the image contains text or flat colour.
- Download the WebP file. Each file gets its own download button as soon as it finishes, and you can pull the whole batch down as a single ZIP.
What changes when you convert JPG to WebP
Every format conversion involves trade-offs, and vague tools hide them. Here is exactly what happens to your image in this particular conversion.
- Both formats are lossy, so the file is being re-compressed. We decode JPG at full fidelity and re-encode once at your chosen quality, which keeps generational loss to a minimum, but converting back and forth repeatedly will visibly degrade an image.
What happens to the file size
Measured, not estimated: two 1200 x 800 pixels references — a photograph and a flat-colour graphic — put through this converter.
| Reference image | As JPG | As WebP | Change |
|---|---|---|---|
| Photograph | 211 KB | 153 KB | -27% |
| Graphic with text | 21 KB | 9 KB | -58% |
Yours will differ: size depends more on what is in the picture than on the formats involved.
About JPEG (Joint Photographic Experts Group)
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992.
Where you probably got it: Photos from cameras, phones, and almost any website.
Strengths
- Opens in literally every image viewer, editor, printer and web form ever made
- Very small files for photographs, with a quality dial you control
- Hardware-accelerated decoding on every phone and camera
Limitations
- No transparency — transparent areas have to be flattened onto a solid colour
- Lossy: each re-save discards a little more detail permanently
- Blocky artefacts around sharp edges, text and flat colour
About WebP
WebP is Google’s web image format, offering roughly 25–35% smaller files than JPG at comparable quality.
Support: Excellent in browsers, poor outside them. This mismatch is why "save image" so often lands you a file nothing else will open.
Strengths
- Noticeably smaller than JPG and PNG at matching quality
- Does both lossy and lossless, and supports transparency in either mode
- Supported by every current browser
Limitations
- Older desktop software, printers and photo kiosks often reject it
- Many websites, job portals and government forms still refuse .webp uploads
- Windows Photo Viewer and older Office versions cannot open it
Is it safe to convert JPG online?
Here, yes — and you can check rather than trust. Open your browser’s developer tools, switch to the Network tab and convert a JPG file: no request carrying your image is made. Disconnect from the internet after this page has loaded and the converter still works, which would be impossible if a server were doing the conversion.
That is worth verifying wherever you convert, because most online converters do upload, and JPG files are so often scans of passports, driving licences and signed forms, which is most of what gets converted to send somewhere. Once a file is on somebody else’s server you are relying on a privacy policy rather than on anything you can observe. We wrote up how to tell a safe converter from a risky one in more detail.
Frequently asked questions
How do I convert JPG to WebP?
Drag your JPG file onto the box above, or click it to browse. The conversion starts immediately in your browser and the WebP download appears within a second or two for most images. You can drop in a whole folder of files at once and download them together as a ZIP.
Are my JPG files uploaded to a server?
No. The conversion happens locally in your browser, so your files are never transmitted anywhere — the tool even works with the network disconnected once the page has loaded. That is also why there is no file size or file count limit: nothing costs us anything per conversion. The practical ceiling is your own device's memory, which on a phone means very large images may fail.
Will converting JPG to WebP reduce the quality?
A little. Both formats are lossy, so the image is decompressed and re-compressed once. We decode at full fidelity and encode a single time at your chosen quality, so a one-off conversion is close to invisible — but avoid converting the same image back and forth repeatedly.
What is the difference between JPG and WebP?
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992. WebP is Google’s web image format, offering roughly 25–35% smaller files than JPG at comparable quality. In practice the choice comes down to compatibility: universal. If a program can open an image at all, it can open a JPG. Meanwhile excellent in browsers, poor outside them. This mismatch is why "save image" so often lands you a file nothing else will open.