JPG to WEBP
Convert JPG images to modern WEBP.
How to use JPG to WEBP
Add one or more JPG images.
Choose the WEBP quality.
Click Convert to WEBP.
Download the converted images.
Why WEBP is worth the conversion
WEBP produces files 25-35% smaller than JPG at visually identical quality. On an image-heavy page that is often several hundred kilobytes off the total weight, which on a mobile connection is the difference between a page that feels instant and one that does not.
That is not only a user-experience point. Largest Contentful Paint is a Core Web Vitals metric and a ranking signal, and on most content pages the largest contentful element *is* an image. Converting the images is frequently the single highest-leverage speed change available.
Browser support is no longer a reason to hesitate
WEBP is supported in Chrome, Firefox, Edge, Safari (since 14, released 2020), and on Android and iOS. In practice that is effectively everyone. The hesitancy is a leftover from around 2018, when Safari support was genuinely missing.
If you must cover ancient browsers, serve both with a picture element and a JPG fallback source. For most sites that complexity is no longer worth carrying.
- Lossy WEBP at quality 80 — photographs. The everyday setting.
- Lossless WEBP — logos, screenshots and diagrams, replacing PNG at 25-35% less.
- Supports transparency, which JPG cannot, so it can replace both formats.
Where WEBP is not the answer
Anywhere outside a browser. Email clients, print workflows, Office documents, many upload forms and older desktop software still expect JPG or PNG, and a WEBP will simply fail to display.
Keep the originals as well. WEBP conversion is lossy, so you want the source file for the day you need a different size, a different crop, or a format that has not been invented yet.
Converting a whole image library
Every step runs inside your browser, using the WebAssembly and Canvas APIs your device already ships with. No file is uploaded, no copy is kept, and nothing sits in a queue on a server waiting to be deleted — which is also why the tool keeps working with the network disconnected.
For bulk conversion that is a practical advantage as much as a privacy one: there is no upload, so a batch runs at the speed of your disk rather than your connection. Twenty images convert in the time an upload-based service would take to receive one.
Frequently Asked Questions
Why use WEBP?
WEBP compresses better than JPG — typically 25–35% smaller at the same visual quality — which makes pages load faster.
Is WEBP supported everywhere?
All modern browsers support WEBP. Only very old software may not open it.
Is my image uploaded?
No, the conversion runs locally in your browser.
Do all browsers support WEBP?
Every browser in current use: Chrome, Firefox, Edge, Safari 14 and later, and both mobile platforms. Support has been effectively universal since 2020.
How much smaller will my images be?
Typically 25-35% smaller than JPG at the same visual quality, and around 25-35% smaller than PNG for lossless graphics. The gain is largest on photographs with fine detail.
Will converting lose quality?
At quality 80-85 the difference from the source JPG is not visible. Note that you are re-encoding an already-lossy image, so convert from the highest-quality original you have rather than from a compressed copy.
Should I keep the JPG versions?
Keep the originals as archives. You will want them for future re-crops, re-sizes and formats, and for the contexts — email, print, Office — where WEBP still does not work.
Does WEBP support transparency?
Yes, with a full alpha channel in both lossy and lossless modes. That is why it can replace PNG as well as JPG, which no other widely-supported format does.
Related tools
Keep reading
- JPG, PNG, WEBP or AVIF: How to Actually Choose
A decision you make dozens of times a week, usually by habit. Here is the rule that gets it right, and what each format costs you when you get it wrong.
- Images Are Why Your Site Is Slow
On most content pages images are the bulk of the bytes and the Largest Contentful Paint. Fixing them is the highest-leverage speed work there is.
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