JPG to WebP Converter
Same photo, same quality, noticeably smaller file.
Free · No watermark · Private — your image never leaves your browser
WebP's block prediction comes from video coding and is a real generational improvement over JPEG's approach — smaller files at genuinely equal quality.
Where JPEG turns blocky, WebP degrades more gracefully, which matters for thumbnails and anything compressed hard for mobile.
Photos are usually the largest assets on a page. Trimming a third from each one moves Largest Contentful Paint, which Google measures directly.
How it works
WebP compresses photographs more efficiently than JPEG at matching visual quality — typically 25 to 35 percent smaller, sometimes more on images with large smooth areas. That's a meaningful saving on a page carrying a dozen photos, and it costs nothing visually. The compression is genuinely better rather than just more aggressive: WebP uses prediction techniques borrowed from video encoding that JPEG, designed in 1992, simply doesn't have. Drop your JPG in and download the WebP.
- 1Drop your JPG in, click to browse, or paste from the clipboard.
- 2Keep quality around 80 percent — the practical sweet spot for photographs.
- 3Compare the output size against the original.
- 4Download your WebP.
Why WebP beats JPEG on the same image
JPEG processes the image in fixed 8×8 blocks and encodes each largely on its own. WebP predicts each block from the pixels already decoded around it and stores only the error — a technique taken from video compression, where predicting the next frame from the last is the entire game. It also uses arithmetic-style entropy coding that packs the result more tightly than JPEG's Huffman tables. Both improvements are structural, which is why the saving holds across most photographic content rather than depending on a lucky image.
You're re-encoding, so start from the best original
Converting JPG to WebP decodes a lossy image and re-encodes it lossily. At sensible quality settings that's invisible, but the artefacts already in the JPEG are now being compressed again, which compounds them slightly. If you still have the original camera file or the export from your editor, convert from that instead. If the JPEG is all you have, use a high quality setting and convert once rather than experimenting repeatedly on the output.
Where JPG is still the right answer
Upload forms that reject WebP, print services, older desktop applications, and email attachments going to unknown recipients. JPEG's universality is its remaining advantage and it's a real one. For anything you publish and control — your own site, your own CDN — WebP is the better default and has been for years.
Frequently asked questions
Is WebP better than JPG?
For the web, yes — typically 25 to 35 percent smaller at equal visual quality, with better behaviour at low bitrates. JPG retains one advantage: it's accepted absolutely everywhere, including software that predates WebP entirely.
Will I lose quality converting JPG to WebP?
At 80 percent quality or above the difference is invisible on photographs. You are re-encoding a lossy image, so start from the highest-quality JPG you have rather than one that's already been compressed several times.
How much smaller will the WebP be?
Usually 25 to 35 percent for photographs. Images with large smooth areas — skies, studio backgrounds — often do better; images already compressed very hard have less left to give.
Should I convert my whole website to WebP?
For photographic content, it's one of the cheapest performance wins available. The standard approach is a picture element with a WebP source and a JPG fallback, though in practice browser support is now universal enough that many sites serve WebP directly.
Does WebP work in email?
Support is patchy — many email clients render it, but enough don't that JPG remains the safer choice for anything embedded in a newsletter.
Is my photo uploaded?
No. Conversion runs entirely on your device inside the browser.