JPG to WebP for Websites — Bulk Convert Free, No Upload

Price	100% free, no sign-up
Input	.jpg / .jpeg / .png site assets
Output	WebP (quality slider), batch to 60 files
Processing	Runs locally in your browser — no upload

What is JPG to WebP for Websites?

Every unconverted JPG on a website is bytes your visitors download for nothing: WebP renders the same picture in roughly 20–30% less space, which shows up directly in LCP and bandwidth bills. This converter takes a site's image folder and re-encodes it to WebP locally — useful for agencies and site owners who cannot push client imagery through third-party upload tools, and for anyone doing a quick performance pass without installing anything.

Common Uses for JPG to WebP for Websites

Shrink blog, portfolio and e-commerce imagery before deploy
Meet WebP-only requirements in frameworks, CDNs and build pipelines
Do a Core Web Vitals pass on an image-heavy site
Trim newsletter and email campaign assets below clipping thresholds

A quick performance pass, step by step

Pull the image folder from your project, drop the biggest files first, and convert at 80%. Check the size column: images that shrank well are done; any that barely changed were already optimized. Replace the originals in your repo, deploy, and re-run Lighthouse — the image payload line should drop by roughly a quarter, often moving LCP with it.

Frequently Asked Questions

What quality should I use for web images?

78–82% WebP is the industry sweet spot for photos: visibly identical to the JPG source at a fraction of the size. Hero images might justify 85–90%. Below 70% artifacts start showing on gradients and text overlays.

Do I still need JPG fallbacks?

Safari 14+ (2020), Chrome, Edge and Firefox all render WebP, so for most audiences a WebP-only pipeline is safe. Supporting very old Safari or legacy webviews? Serve WebP with a JPG fallback via the picture element.

Is converting on my own server better?

Server-side pipelines (sharp, cwebp) automate conversion at deploy time and are the right long-term setup for big sites. This browser tool is the zero-install route: no Node, no CI changes — convert a folder and ship it.