JPG to WebP Converter - Free, No Upload
Convert a JPG image to WebP entirely in your browser. WebP generally holds more visual detail than JPEG at the same file size, making it a good choice for images destined for the web.
Maintained by Hirantha Sandaruwan Lakshan. Updated 31 July 2026.
How it works
The JPEG is decoded and drawn to an off-screen canvas, then re-encoded as WebP at the quality level you choose.
If your browser can't encode WebP natively, a small WebAssembly encoder loads automatically as a fallback - detected with a real encode test, not by checking which browser you're using.
WebP's compression algorithm handles flat colour, fine text, and photographic detail more efficiently than JPEG, which is why the same visual quality often comes out smaller.
Worked examples
Optimising images for a website
Converting product photos or blog images from JPG to WebP typically shrinks them noticeably at the same visual quality, which helps page load speed.
Reducing storage for a photo archive
Batch converting a folder of JPGs to WebP at a high quality setting saves space with minimal visible difference.
Preparing images for a CMS that prefers WebP
Many modern content platforms recommend or require WebP for uploaded images - convert here first rather than installing dedicated software.
Frequently asked questions
Is WebP better than JPEG?
Generally yes for file size at equivalent visual quality, especially for images with flat colour or text. JPEG has broader legacy compatibility.
Does every browser support WebP?
Every current browser supports viewing WebP. This tool also handles browsers that can't encode WebP by loading a small fallback encoder automatically.
Is my image uploaded anywhere?
No, everything runs locally in your browser tab.
Can I convert several JPGs at once?
Yes, drop in a batch and they'll all convert together.
How much smaller will the WebP be?
Typically 25-35% smaller than an equivalent-quality JPEG, though it varies a lot with the image. Flat colour and graphics benefit most; grainy photos least.
Will WebP work in email?
Support is patchy in email clients, so stick with JPEG for anything you're attaching or embedding in a newsletter. WebP is aimed at the web.
Does WebP support transparency?
Yes, unlike JPEG. Converting from JPEG there's no transparency to carry over, but WebP itself handles it.
Should I keep the original JPG as a fallback?
For a website, modern browsers all support WebP so a fallback is rarely needed now. Keeping the original is still sensible as an archive copy, since converting again from the WebP would compound the loss.
Does this work on my phone?
Yes - it runs in your phone's browser exactly like on a computer, with no app to install.
Sources & references
Updated Jul 31, 2026