Convert JPG to WebP.
For free.
Convert your JPG images to WebP for free. Smaller files, same visual quality — and your images never leave your device.
Glissez vos images ici
PNG, JPG, WebP, AVIF · 5MB max par lot
BEST IMG Optimizer aussi en plugin WordPress
Optimisez directement les images de votre médiathèque WordPress, sans changer d'onglet. Compression 100% locale sur votre propre serveur (aucune image envoyée à l'extérieur) — le même principe que l'outil en ligne.
Why convert JPG to WebP?
WebP is a modern image format developed by Google that typically produces files 25–35% smaller than JPG at the same visual quality. That means faster page loads, less bandwidth usage, and better Core Web Vitals scores — all with no visible difference in image quality. WebP is supported by every modern browser (Chrome, Firefox, Safari, Edge).
How it works
Drop your JPG
Drag and drop one or more JPG/JPEG files into the drop zone, or select them from your device.
WebP is pre-selected
The output format is already set to WebP. Adjust the quality slider if you want a different size/sharpness balance.
Download your WebP files
Get your converted images individually or all at once, ready to use on your website.
Why use best-img to convert JPG to WebP
- Total privacy: your images are processed locally in your browser, never uploaded to a server.
- Fine-grained quality control to get the best size/sharpness balance for your use case.
- No file size roundtrip: conversion starts instantly, no upload or download queue.
- No sign-up required for the free tier (20 images/day).
- Batch convert multiple JPGs to WebP at once.
Frequently asked questions
Will I lose quality converting JPG to WebP?
At the recommended quality settings (80–90), the difference is not visible to the naked eye, while the file size drops significantly. You can adjust the quality slider to fit your needs.
Is WebP supported by all browsers?
Yes. All modern browsers (Chrome, Firefox, Safari, Edge) have supported WebP for several years. It's safe to use on any website today.
Can I convert multiple JPG files at once?
Yes, you can drop several JPG files at once and convert them all to WebP in a single batch.
Is this tool really free?
Yes, up to 20 images per day at no cost, with no account required. A Premium plan removes the daily limit if you need more.
Do you support other formats too?
Yes — you can also convert to AVIF, JPEG, or PNG, and compress PNG, WebP or AVIF files, all with the same tool.