If Lighthouse or PageSpeed Insights has told you to serve images in next-gen formats, this is the conversion it means. Images are usually the heaviest thing on a web page, and JPEG — solid as it has been for thirty years — leaves real savings on the table. WebP typically lands 25–35% smaller than a JPEG of comparable visual quality, which adds up quickly across a product catalog, a photo-heavy blog, or a portfolio site. Smaller images mean faster loads, better Core Web Vitals, and less bandwidth billed by your host.
Browser support stopped being a concern years ago. Chrome, Firefox, Edge, and Safari all render WebP natively, as do current mobile browsers, so for anything web-facing you can adopt it without fallbacks in most cases. Where WebP still stumbles is outside the browser — some older desktop viewers and editors do not open it — so it makes sense as a delivery format for the web while you keep originals around in JPEG or PNG for editing.
Because your JPEGs are already lossy, converting to WebP re-encodes them, and the quality setting decides how gentle that second pass is. Convertmaxxing defaults the slider to 80, which preserves the look of typical photos while capturing most of the size savings. Going lower shrinks files further at some visible cost; going higher protects fine detail but narrows the gap versus the original JPEG. A quick before-and-after comparison on one representative image will tell you where your sweet spot is.
The converter runs completely client-side. Your images are processed by WebAssembly in the browser tab itself — never uploaded, never stored on a server, no signup involved — so batch-converting a folder of product shots does not mean shipping your catalog to a third party. It is free, the engine downloads once (about 5 MB) and is cached by your browser, and you can strip EXIF metadata during conversion so camera and location data does not end up published with your site images.
Why convert JPEG to WebP?
- Typically 25–35% smaller files than JPEG at similar visual quality — faster pages and better Core Web Vitals
- Native support in all modern browsers, desktop and mobile
- Quality slider (default 80) lets you tune the size-versus-detail balance per batch
- Optional EXIF stripping keeps camera and GPS data out of your published images
- Free, no signup, and fully in-browser — your originals are never uploaded anywhere
How it works
- Step 1
Drop your files
Drag your JPEG files into the converter above, or click “Choose files”. Batches are welcome.
- Step 2
Pick your settings
WebP is preselected. Adjust quality or size if you want, or keep the defaults.
- Step 3
Convert and download
Conversion runs locally in your browser. Download files individually or grab everything as a zip.
Frequently asked questions
- Are my photos stored on your servers while converting?
- There are no servers involved at any point. The conversion engine is WebAssembly running inside your browser tab, so your JPEGs stay on your machine from start to finish. Open your browser's network tab during a conversion if you want proof: your images never appear in any outgoing request.
- JPEG is already lossy — does converting to WebP degrade my images again?
- It is a second lossy encode, yes, but at quality 80 or above the difference is rarely visible on ordinary photos, and the file gets meaningfully smaller. Avoid repeatedly converting back and forth between lossy formats, and keep your original JPEGs as masters.
- What quality value should I pick?
- Start at the default of 80. For hero images and photography portfolios, 85–90 keeps fine texture intact. For thumbnails, product grids, and blog inline images, 70–75 often looks fine and saves the most weight. Test one image at a few settings before batch-converting.
- Will WebP work for visitors on older browsers?
- Every major browser has supported WebP for years, including Safari on modern macOS and iOS. Only very old browsers lack it; if those matter to your audience, serve WebP through a picture element with a JPEG fallback. For most sites today, plain WebP is safe.
- Does the EXIF data from my camera survive the conversion?
- That is up to you. The converter can strip metadata — EXIF, GPS coordinates, camera model — during conversion, which is usually the right call for images going onto a public website. Leave stripping off if you want the metadata retained.