JPG to WEBP Converter
Convert JPG (Joint Photographic Experts Group, 1992) to WEBP (WebP, 2010) entirely in your browser. Output files are noticeably smaller — usually 33% smaller on photographs for ordinary photographs. Files never leave the tab — there is no upload.
Which formats are supported?
Inputs: PNG, JPEG, WEBP, AVIF, GIF, BMP, ICO, TIFF (Safari) and HEIC/HEIF (via libheif WASM, loaded on demand). Outputs: PNG, JPEG, WEBP, AVIF — each with an optional WASM encoder variant in the dropdown (mozjpeg, oxipng, libwebp, libavif) for tighter compression or consistent output across browsers. Vendor camera RAW formats (CR2/CR3/NEF/ARW/DNG/...), PSD, EPS, TGA, XCF and ICNS are still rejected — those need format-specific decoders we haven't shipped yet.
Both formats default to lossy encoding for photographs. We use the default quality setting (92) which preserves visually-identical detail for most images. Drop the slider lower for hero images on slow connections, raise it for printable masters.
JPG has no alpha channel, so the output WEBP will be fully opaque. WEBP's transparency support is preserved for any later edits you do on top of the converted image.
WEBP is the natural choice for Web delivery where AVIF is too aggressive, Replacing both JPEG and PNG with a single format, and Animated graphics under 5MB. It is a poor fit for Email attachments and Sending to non-technical end users who'll re-share the file. All current browsers; not safe for email or legacy enterprise software.
JPG: what it is
DCT-based lossy compression. Every save throws away high-frequency detail; repeated re-saves visibly degrade the image (generation loss).
Has no alpha channel, so 'transparent JPG' is a contradiction in terms — converters fill transparent pixels with white.
WEBP: what it is
Lossy WEBP uses VP8 intra-frame coding (the same predictor system as the VP8 video codec). Lossless WEBP is a separate algorithm that beats PNG on most images.
Typical lossy WEBP is 25–35% smaller than a visually-equivalent JPEG and 50–70% smaller than the equivalent PNG.
At a glance
- Typical size change
- ~33% smaller
- Transparency preserved
- N/A — neither side carries transparency information
- Compression
- JPG (lossy) → WEBP ( both)
- WEBP browser support
- All current browsers; not safe for email or legacy enterprise software.
Frequently asked questions
Is the converted WEBP smaller than the original JPG?
On a typical photograph, noticeably smaller — usually 33% smaller on photographs. Synthetic graphics (logos, screenshots) may behave very differently — try a single file first if size matters.
Will my JPG be uploaded to convert it?
No. The conversion runs inside the browser tab using WebAssembly. Your file is never sent over the network — drop it, convert it, download it, all on your machine.
Will WEBP open in older software?
All current browsers; not safe for email or legacy enterprise software. If you need to send the file to someone using a 5+ year old version of Outlook, Word or other desktop software, convert to JPG or PNG instead.