Convert JPG and PNG images to WebP for a faster website — or convert WebP files back to JPG/PNG for maximum compatibility. Batch conversion with adjustable quality, processed entirely in your browser.
Supports JPG, PNG, and WebP · multiple files at once
WebP is an image format developed by Google specifically for the web. Its compression is a generation newer than JPG's (1992) and PNG's (1996), which is why the same photo at the same visual quality is typically 25–35% smaller as WebP than as JPG — and graphics with transparency are often 50%+ smaller than their PNG equivalents. Uniquely, WebP handles both jobs in one format: lossy photographic compression like JPG and alpha transparency like PNG, so you no longer have to choose formats per image type.
Smaller images matter because images dominate page weight. Google's Core Web Vitals — a real ranking input — hinge largely on how fast your biggest image paints. Swapping a page's JPGs and PNGs for WebP is usually the single cheapest performance win available, no code changes required beyond the file swap. Every current browser (Chrome, Edge, Firefox, Safari 14+, all mobile browsers) displays WebP natively; the compatibility caveats that kept people away in 2020 are gone.
To WebP: drop in JPGs or PNGs, set quality (80–85 is the sweet spot for photos on the web), and convert. Photos convert losslessly enough that nobody can tell, while graphics and screenshots keep their sharp edges. Transparency in PNGs survives the trip automatically.
From WebP: the reverse trip matters just as often. Right-click-saving an image from the modern web usually hands you a .webp file — which Photoshop versions before 23.2, older phones, Microsoft Office, and many upload forms still reject. Convert to JPG for photos you'll share or print, or to PNG when the WebP contains transparency you need to keep. For further size reduction after converting to JPG, run the result through our Image Compressor; to change dimensions too, start with the Image Resizer.
WebP's quality dial behaves like JPG's but starts from a more efficient baseline. At 85, output is visually indistinguishable from the source for nearly all photographs. At 75, artifacts remain invisible at normal viewing sizes while files shrink dramatically — many large sites ship at exactly this level. Below 60, smooth gradients begin to band and fine textures smear, so drop that low only for thumbnails. One warning applies to every lossy format: converting an already-compressed JPG to WebP re-encodes it, stacking two generations of loss. That's fine once at sensible quality, but always convert from the best original you have, and keep it. For the broader format landscape — including AVIF, WebP's even newer sibling — see our guide to the best image formats for the web.
For web delivery, almost always — same quality, smaller file. JPG still wins for maximum compatibility: printing kiosks, older software, government portals, and email clients accept JPG without question. Publish WebP; share and archive JPG.
No — WebP has a full alpha channel, and transparency is preserved automatically. Going the other way, choose PNG (not JPG) as the output, or transparent areas will be flattened to white.
No. Conversion uses your browser's built-in codecs via the HTML5 canvas — files never leave your device, and the tool works offline once loaded.
Two common causes: the original was already heavily compressed (re-encoding low-quality JPG at high WebP quality can add bytes), or it's a simple flat graphic where PNG was already near-optimal. In both cases, keep the original — the converter shows you the size change per file so you can decide.
AVIF compresses another ~20% smaller but encodes slowly and still trails WebP slightly in tool support. WebP is today's safe default; serving AVIF with a WebP fallback via the <picture> element is the enthusiast setup.
Yes — select or drop a whole batch; each file converts independently with its own size report and download button.