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

Upload 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

WebP is typically 25–35% smaller than JPG at matching quality.
Keep a JPG copy if you must support very old software.

Supported formats

Input: JPEG. Output: 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 “optimisation”.

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.

Common issues & limitations

Converting a lossy JPG cannot add back lost detail.
All processing happens on your device; nothing is uploaded, so very large batches are limited by your available memory.

Frequently asked questions

How much smaller is WebP than JPG?

At the same visual quality, WebP is often 25–35% smaller than JPG. Savings vary by image, so compare the before/after sizes shown.

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.