Create Empty WebP

Layout placeholders during web design, lazy-load spacers (the WebP loads first to reserve space, then the real image swaps in), transparent overlays for compositing, blank canvas for image editing apps, or test files for tooling that needs a valid WebP input.

8192 × 8192. The HTML spec doesn’t strictly cap canvas size but most browsers stop honouring `getContext(‘2d’)` past around 16k×16k, and mobile Safari often fails earlier. 8192 is a safe ceiling that works everywhere.

WebP uses predictive compression. A blank image has zero variation, so the compressor needs to encode “this entire image is colour X” plus a few bytes of header. A solid-white 1920×1080 typically encodes to ~150-300 bytes – about 2 million times smaller than the raw 8.3 MB of uncompressed pixel data.

On Chrome, Firefox, Edge, Opera, and Safari 14+ (≈99% of browsers in 2026), yes. The banner at the top of the tool detects encoder support. Old browsers fall back to PNG and the toast tells you.

Yes. The canvas is cleared to fully transparent (alpha = 0) before encoding. The resulting WebP uses VP8L (lossless) automatically when alpha is present. The file may be slightly bigger than a solid-color WebP because lossless overhead.

It’s the universally-recognised visual indicator of “this area is transparent in the source image, the checkerboard is just to show you the boundary”. Useful when you want a visual placeholder that screams “transparent” even when displayed on a colored background.

WebP quality controls how much detail is preserved. A blank image has no detail to preserve – every pixel is identical – so the encoder needs to spend the same handful of bytes regardless of quality setting. Lower quality on a blank image saves you maybe 10 bytes.

Yes. You drew it; you own it. No copyright restrictions apply – this tool generates the file from your inputs without touching any third-party content.

No. The Canvas API runs in your browser. Nothing leaves your device.

Click presets or change parameters and click Generate again. Each click overwrites the preview. For a true batch, run this in a script (Node + sharp, or Python + Pillow) – single-shot generation is faster for the rare case of needing one file.