WebP Converter
WebP to JPG or PNG and back again — including in Safari, without uploading.
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Use Actual pixels to inspect fine detail at 100% — both sides scroll together.
About the WebP Converter
Convert in either direction: WebP to JPG or PNG when an app, printer or upload form does not accept WebP, and JPG or PNG to WebP when you want smaller images for a website. With Auto, WebP files become JPG (or PNG if they have transparency, so nothing turns white) and JPG/PNG files become WebP.
Some browsers — notably Safari — can display WebP but cannot create it. MySmartCoPilot detects this and uses its built-in WebP encoder (Google’s libwebp, compiled to WebAssembly) instead, so the converter works the same in every browser. Lossless WebP always uses that encoder.
How to use it
- Drop WebP, JPG or PNG files onto the box, click Choose images, or paste with Ctrl/⌘ + V.
- Leave Convert to on Auto, or pick WebP, JPG or PNG for every file.
- For WebP and JPG, set the Quality; tick Lossless for pixel-perfect WebP. JPG uses the Background colour where the image is transparent.
- Download each file or Download all as a ZIP.
Examples
shoe.webp (no transparency) · Auto · Quality 85
shoe.jpg
sticker.webp (with transparency) · Auto
sticker.png with the transparency intact.
hero.jpg, logo.png · Auto · Quality 85
hero.webp (lossy) and logo.webp (keeps transparency).
Common uses
- Opening and sharing WebP images saved from websites in apps that only understand JPG or PNG.
- Converting site images to WebP to make pages lighter.
- Creating lossless WebP versions of logos and screenshots.
- Converting WebP files on iPhone or Mac, where Safari cannot save WebP by itself.
About WebP
WebP is an image format developed by Google that supports lossy and lossless compression and transparency. Google reports that lossy WebP files are 25–34% smaller than comparable JPEGs at equivalent SSIM quality, and lossless WebP files 26% smaller than PNGs (WebP documentation). All current versions of Chrome, Edge, Firefox and Safari can display WebP, but some older apps, editors and upload forms still cannot.
Lossy, lossless and quality
- Lossy WebP (default) works like JPG: lower quality, smaller file. 75–85 suits most photos.
- Lossless WebP stores the image without compression loss, like PNG, and is usually smaller than the PNG. Ideal for logos, screenshots and graphics.
- WebP → PNG is lossless. WebP → JPG re-compresses the image, so choose a high quality (85–95) if the WebP was already compressed.
Limitations
- Images up to 50 megapixels and 200 MB each, up to 100 per batch.
- Animated WebP files are converted to their first frame.
- Metadata is not copied, and colours are converted to sRGB.
- Lossless output is exact for opaque pixels. Partly transparent pixels can change by a rounding step when the browser decodes the image (not visible).
- Lossless WebP and WebP in Safari use the WebAssembly encoder, which is slower than a browser’s built-in encoder for very large images.
Privacy
Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot.
Frequently asked questions
Why can’t I save WebP images on my iPhone or Mac?
Safari displays WebP but its canvas cannot write WebP files. This converter notices that and uses its own WebP encoder in your browser, so conversion to WebP still works — nothing is uploaded.
Should I convert WebP to JPG or PNG?
JPG for photos (smaller files, works everywhere). PNG when the image has transparency or sharp text and lines. Auto picks for you based on whether the WebP has transparency.
Is WebP better than JPG?
For websites, usually: similar quality at a smaller size, plus transparency. For sharing with people and older apps, JPG is still the most compatible.
Are my images uploaded?
No. All conversion — including the WebAssembly encoder — runs on your device, and the page works offline once loaded.