Convert JPG to WebP — Free JPG to WebP Converter

How to Convert JPG to WebP

Why Convert JPG to WebP?

WebP produces files 25–35% smaller than JPG at equivalent visual quality, making it the go-to format for web performance. Converting your JPG images to WebP means your website loads faster, uses less bandwidth, and scores better on Core Web Vitals — all of which help with search rankings.

Google developed WebP specifically as a successor to JPG for web images. It uses more advanced compression algorithms that preserve detail better at lower file sizes. Every modern browser supports WebP, so compatibility is no longer a concern.

The WebP encoder runs in the page, so images go from your disk back to your disk without a network hop in between. Free, no data collection, and no account to make.

WebP is particularly effective for photo-heavy pages where every kilobyte matters. After converting, check our compressor for fine-tuned optimization. If you want the absolute smallest files, try JPG to AVIF for next-generation efficiency.

Compress your images · JPG to AVIF

What changes going from JPG to WebP

Your JPEG's pixels are decoded, any rotation flag is applied on the way, and VP8 compresses them again at quality 80 by default. The number means VP8's scale, which doesn't line up with the one your camera or editor used, so 80 here and 80 there are different amounts of loss. Whatever blocking the first encoder left is carried into the WebP as if it were picture detail.

Measured on our fixture photo, a 3840x2160 JPEG of 538.6 KB came out at 290.3 KB as WebP at quality 80, through the same encoder call the compressor runs. Treat that as one data point; heavily compressed JPEGs have less left to squeeze, and a JPEG saved at quality 95 or above drops much further. Camera metadata, GPS coordinates and the ICC profile don't ride along, which is worth knowing before you publish and worth missing if this was your only copy.

Compatibility shifts from universal to nearly universal. Browsers are covered, but email attachments, many CMS upload filters and older desktop viewers still balk at a .webp, and an older Windows 10 install may not thumbnail it at all. Don't convert the only copy of a photo you care about; keep the JPEG as the master and treat the WebP as a delivery format you can regenerate at any time.

JPG vs WebP

What is a WebP file?

Google announced WebP in September 2010, built from the VP8 keyframe coder, and the IETF later published it as RFC 9649. One container holds two unrelated codecs — lossy VP8 intra-frame coding and a separate lossless LZ77 mode — which is why quality 100 lossy is still lossy. Google measures roughly 30% off JPEG at matching quality and about 26% off PNG for lossless. The catch: lossy WebP is locked to 4:2:0 chroma, so saturated reds and syntax-highlighted screenshots can look worse than a JPEG of the same size.

How to open a WebP file

Chrome, Firefox, Safari and Edge all decode WebP, including transparency and animation. macOS opens it natively in Preview and Quick Look from Monterey onward. Windows is the friction point: the Photos app only gained WebP in a 2023 update. On Linux, GIMP reads and writes it, and the reference cwebp and dwebp command-line tools ship in the webp package on essentially every distribution.

Convert other formats to WebP

Convert JPG to other formats

• JPG to PNG
• JPG to AVIF
• JPG to PDF

Frequently Asked Questions