Convert Images Browser processing Batch + ZIP

Convert JPG to WebP

Convert JPG photos to modern WebP for smaller files and faster page loads, with a quality slider.

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How to use JPG to WebP

Choose your JPG/JPEG files.
Set the WebP quality (80 is a good default).
Optionally resize for web display.
Batch several files and download them together as a ZIP.

About this tool

Convert JPG photos to WebP to make them noticeably smaller at the same visual quality, which speeds up page loads. The before/after sizes show exactly how much you save.

Recommended settings

Settings we suggest

Google measured lossy WebP at 25–34% smaller than JPEG across a large corpus; your own file may differ either way, and both sizes are shown.
Keep a JPG copy if you must support very old software.

Supported formats

Input: JPG. Output: WebP.

Input formats

JPG

Output formats

WebP

Quality & file size

Lossy formats (JPEG, WebP, AVIF) trade detail for smaller files as you lower the quality; PNG stays lossless regardless of the slider. The tool always shows the original and result sizes so you can judge the trade-off, and it never recommends a result that is larger than your original as an “optimization”.

Privacy

Every image is decoded, transformed and re-encoded entirely in your browser using the Canvas API and a Web Worker. Files are never uploaded, are not stored in localStorage, and are cleared from memory when you remove them or close the page.

More detail: how we process images, security privacy policy.

Common issues & limitations

Converting a lossy JPG cannot add back lost detail.
All processing happens on your device, so the limits protect your own browser rather than a server: 25 MB per file, 20 files per batch, and 40 megapixels per image.

Frequently asked questions

How much smaller is WebP than JPG?

Google measured lossy WebP at 25–34% smaller than JPEG across a large image corpus at equivalent quality. That is an average, not a promise: a busy, high-detail photograph may save almost nothing. The tool shows both sizes for your actual file, and that is the number to trust.

Is WebP supported everywhere?

All modern browsers display WebP. Very old software may not, so keep a JPG copy if you need maximum compatibility.

Are my images uploaded to a server?

No. Every image is decoded, processed and encoded entirely inside your browser using the Canvas API. The files never leave your device and are discarded when you close the page.

Related tools

Guides that explain this

Longer reads on choosing a format and a quality setting, written around the same trade-offs this tool exposes.