Overview
WebP delivers roughly 25% smaller files than JPEG at the same visual quality and supports transparency like PNG, which makes it the default modern format for web delivery. Converting your JPEG and PNG assets to WebP reduces bandwidth, speeds up Largest Contentful Paint, and is supported by every current browser. Clear Canvas converts between PNG, JPEG, and WebP locally in your browser, so you can batch a whole image folder without uploading anything.
Example workflow
- 1
Gather source assets
Collect the JPEG and PNG images you serve — heroes, thumbnails, illustrations, and icons.
- 2
Convert to WebP
Choose WebP as the output. Photographs convert with high-quality lossy WebP; graphics and transparent assets keep their alpha channel.
- 3
Keep a fallback if needed
To support very old clients, keep the original and reference WebP first via a <picture> source with the legacy JPEG/PNG as fallback.
- 4
Wire up delivery
Point your <img> or <picture> tags at the WebP files and confirm the server sends the image/webp MIME type.
- 5
Verify savings
Re-measure page weight; the WebP versions should be noticeably lighter than the originals they replaced.
Best settings
- Use WebP for both photos and transparent graphics — it covers the PNG and JPEG use cases in one format.
- Convert photos from JPEG to lossy WebP; convert PNG line art and logos to WebP to preserve transparency at a smaller size.
- Compress to your target quality before or during conversion rather than converting an already-bloated original.
- Serve WebP with a <picture> element when you still need a JPEG/PNG fallback for legacy clients.
When this works well
- Migrating an existing JPEG/PNG image library to a modern delivery format.
- Squeezing more out of Core Web Vitals after you have already compressed.
- Image-heavy galleries where per-image savings compound across the page.
When to use another workflow
- If you only need to shrink an existing JPEG and stay in JPEG, compress instead of converting.
- If a destination platform or email client does not support WebP, convert to JPEG (photos) or PNG (transparency) instead.
Common mistakes
- Converting to JPEG when the source has transparency — JPEG fills transparent areas with a white background.
- Shipping WebP with no fallback for genuinely ancient browsers that cannot decode it.
- Converting a huge original without resizing or compressing first, so the WebP is smaller but still oversized.
Frequently asked questions
How much smaller is WebP than JPEG?
About 25% smaller at the same visual quality, and it also supports transparency, so a single WebP can replace both your JPEG photos and PNG graphics.
Does converting to WebP lose quality?
Lossy WebP for photos is visually comparable to a high-quality JPEG. For graphics and transparent assets, WebP can be used losslessly to preserve crisp edges and alpha.
Will WebP work in all browsers?
Every current major browser decodes WebP. For rare legacy clients, serve WebP via a <picture> element with a JPEG or PNG fallback.
Related tools and workflows
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