Convert JPG to WebP
This is a straightforward downgrade in file size with essentially no visible cost. Both formats discard some detail to stay small, but WebP's encoder does it more efficiently, so re-encoding a JPG as WebP at a matched quality setting produces a smaller file that looks the same.
Add a JPG here and it converts straight to WebP — the output is already set. Both are lossy, so this isn't a lossless upgrade, but WebP reaches the same visual quality as JPG in noticeably fewer bytes — typically 25–35% smaller. Nothing is uploaded.
- Nothing uploadedRuns on your device
- No limitsNo account, no watermark
- No upload waitStarts immediately
What you're actually trading
There is a real cost here, just not a visible one at normal settings: the JPG has already discarded some detail once, and converting to WebP re-encodes what remains rather than recovering anything. Doing this repeatedly, back and forth between lossy formats, does compound loss — doing it once, from a JPG you're keeping as WebP going forward, does not meaningfully matter.
Where this conversion is unambiguously worth doing is anywhere the image is served on the web, since smaller files mean faster pages and page speed is a ranking input.
- Best used once, converting a JPG you'll keep as WebP from here on
- Not worth repeating back and forth between JPG and WebP for the same image
- The main reason not to: a destination that specifically requires JPG
Nothing is uploaded to convert it
The conversion runs on your own device. Your image is decoded and re-encoded in the browser tab and the result is written back — no copy of it, at any stage, is ever sent anywhere.
You can confirm it: open the Network tab before you start, or disconnect from the internet once the page has loaded and convert anyway. The only thing that needs a connection is the first load of the page itself.
Questions
- Is this a lossless conversion?
- No, both JPG and WebP are lossy formats. The point of this conversion isn't removing loss, it's reaching the same visual quality in a smaller file — WebP's encoder is simply more efficient than JPG's.
- How much smaller will it be?
- Typically 25–35% smaller than the original JPG at matched visual quality, though the exact number depends on what's in the image — photographs with fine detail save less than simpler images.
- Will converting damage the image further?
- There's a small technical loss from re-encoding, since the JPG has already discarded some detail and the WebP encode works from what remains. At normal quality settings this isn't visible. Repeatedly converting back and forth would compound it; converting once does not.
- Will every browser display the WebP?
- Every current browser, including Safari since 2020. Some older desktop software and a handful of email clients still don't, which is the main reason to keep a JPG version for those specific uses.
- Is my photo uploaded to convert it?
- No. The conversion runs entirely in your browser — confirm it in the Network tab, or disconnect after the page loads and it still works.
Converting a different way
Or use Convert Image directly if you'd rather choose the output format yourself.