Convert JPG to WebP
JPG → WebP. 30% Smaller. Better Lighthouse Score. Nothing Uploaded.
Convert JPG images to WebP for faster website loading. Batch convert entire /images/ folders. Process everything locally - no upload, no server.
100% Private
Zero cloud uploads
True Color Fidelity
Original colors stay vibrant
Instant Speed
Fast in-browser processing
Free Online
No file limits
Drag & Drop Files Here
or click to browse from your device
Accepted: jpg, jpeg
Tool Options
Turn JPEG photos into modern WebP files for faster websites and smaller storage. Everything runs locally—nothing is uploaded.
Why Convert JPG to WebP
25-35% Smaller Than JPG at Same Quality
Google created WebP specifically to replace JPG for web delivery.
At quality 80, a WebP file is typically 25-35% smaller than the equivalent JPG - improving load times directly.
Fixes Google Lighthouse 'Next-Gen Formats' Warning
If your Lighthouse report flags 'Serve images in next-gen formats,' converting JPGs to WebP is the direct fix.
FastCompressor batch-converts entire image directories.
Supported by All Modern Browsers
WebP is supported by Chrome, Firefox, Safari 14+, Edge, and Opera.
For older Safari compatibility, use the element with JPG fallback.
Batch Convert Entire Website Image Libraries
A website with 200 product images cannot be converted one at a time.
FastCompressor converts entire folders of JPGs to WebP in a single operation.
How to compress JPG to WebP Converter files
Instant, private compression in three quick steps.
Select Files
Drag and drop your JPG to WebP Converter files into the browser or click Browse.
Choose Quality
Pick Balanced (recommended), Lossless, or Maximum compression presets.
Instant Download
Save files individually or download all converted files in a single ZIP archive.
Built for professionals who need speed, privacy, and quality.
Web developers optimising image assets for Core Web Vitals and PageSpeed scores
Shopify and WooCommerce merchants improving product page load times
Next.js developers pre-converting images before the next.js/image component handles them
SEO professionals reducing page weight to improve ranking signals
Marketing teams converting email banner images for web landing pages
How We Compare
Why privacy-focused professionals choose FastCompressor
| Feature | FastCompressor | Typical Online Tool |
|---|---|---|
| Output format | WebP (VP8 optimised) | WebP (default settings) |
| Size vs source JPG | 25-35% smaller | Varies |
| Batch conversion | Unlimited (Pro) | 1-10 files |
| Quality preview | Yes - before/after | Sometimes |
| No upload | Yes | No |
| Price | $19 once | $5-79/month |
Why use FastCompressor Desktop for JPG to WebP Converter?
Online tools are great for quick, single-image edits. But when you need to process hundreds of files or maintain strict privacy, native software is the only way to go.
Convert JPG to WebP
The case for switching to WebP in 2026
In 2020, WebP was an experiment. In 2026, it's the standard. Chrome, Firefox, Safari, Edge, and Opera all support WebP natively. 97% of all web browsers handle WebP without a polyfill or fallback. If you're still serving JPEG as your primary format, you're sending users 25-35% more data than necessary on every page load.
The numbers are concrete: a 400 KB JPEG converted to WebP at equivalent quality is typically 270-290 KB. Over 20 product images on a Shopify store, that's 2.5 MB saved per page load. Google's Core Web Vitals algorithm penalises pages that serve images in "legacy formats" - its specific language for JPEG and PNG when WebP or AVIF is available.
FastCompressor's JPG-to-WebP converter runs the conversion entirely in your browser using WebAssembly. You choose the quality level, preview the result, and download the .webp file. No upload, no waiting for a server, no account.
For WordPress users: Install a WebP-serving plugin (WebP Express, EWWW, or Imagify) to automatically serve WebP to supported browsers. Convert your existing JPEG library with FastCompressor first to get a WebP version of every image.
For Shopify merchants: Shopify automatically converts images to WebP for supported browsers since 2021. But if you're uploading highly compressed JPEGs, the auto-conversion quality may not be optimal. Upload a well-compressed WebP directly for more control over the output.
Frequently Asked Questions
Common questions about in-browser JPG to WebP Converter optimization.
Convert JPG to WebP in Bulk - $19 Once
25-35% smaller · Batch folders · No uploads · 30-day guarantee