NoWebP: WebP to PNG, Copy & Save as PNG

Known samples with the exact behavior you should see when NoWebP is active. Load extension/ as an unpacked extension first — see the README.

How NoWebP works:

Automatic conversion: Ordinary downloads of static WebP images automatically save as PNG. Non-WebP images and animated WebP are left untouched automatically.
Standalone keyboard copy: When viewing a static WebP image by itself in a browser tab, pressing ⌘C / Ctrl+C copies PNG image data to your clipboard.
Explicit context menu: Right-clicking an image gives you NoWebP's menu actions:
- Copy image as PNG: copies static WebP and JPEG as PNG, and passes through PNG.
- Save image as PNG…: saves static WebP and JPEG as PNG, and saves PNG via a standard save dialog.
Animated WebP: Animation is not flattened to static PNG. Copy/Save as static PNG is not supported for animated WebP; an explanatory notice is shown at the top of the page, and your clipboard/downloads remain untouched.
Chrome limitation: Chrome's built-in right-click “Copy Image” command is outside NoWebP's control due to browser platform limitations. Use NoWebP's “Copy image as PNG” menu item instead.

1. Static WebP with alpha

A static WebP image with transparency.

Expected:

Downloading the file saves as a valid .png.
Viewing standalone and pressing ⌘C / Ctrl+C copies as PNG (pastes into PowerPoint Web).
Right-click ➔ Copy image as PNG copies as PNG.
Right-click ➔ Save image as PNG… opens one save dialog prefilled with .png.

A standard static lossy WebP image.

Expected: Supported static WebP — automatic download, standalone keyboard copy, Copy image as PNG, and Save image as PNG… all produce PNG.

A lossless static WebP image.

Expected: Supported static WebP — automatic download, standalone keyboard copy, Copy image as PNG, and Save image as PNG… all produce PNG.

An animated WebP image. NoWebP preserves the animation and does not flatten it to static PNG.

Expected:

Automatic download and keyboard copy remain unchanged as original animated .webp.
Copy / Save as static PNG is not supported for animated WebP. Right-clicking and selecting Copy image as PNG or Save image as PNG… leaves clipboard/download untouched and shows a top notice: “Animated WebP can't be copied or saved as a static PNG.”