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Smaller, faster pages
WebP is typically 25–35% smaller than JPG and far smaller than PNG, which speeds up load times and helps SEO.
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Convert images to WebP
Turn JPG and PNG into modern WebP files that are far smaller at the same quality — and keep transparency. Faster pages, better Core Web Vitals, all done in your browser.
Drop images here or browse
JPG · PNG · GIF · BMP → WebP — or paste with Ctrl/⌘ + V
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🔒 Conversion happens entirely on your device. Nothing is uploaded.
Why convert to WebP
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Keeps transparency
Unlike JPG, WebP supports transparent backgrounds — so logos and graphics convert cleanly from PNG.
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Works everywhere
Every modern browser supports WebP, so you get the size benefits without compatibility worries.
Why WebP is usually smaller
WebP's lossy mode is derived from the VP8 video codec's intra-frame coding, and it brings techniques JPEG predates. The most important is predictive coding: each block is predicted from already-decoded neighbouring pixels using one of several directional modes, and only the difference from that prediction is stored. On images with structure — which is most images — the residual is far smaller than the original block.
It also uses a smarter entropy coder, arithmetic coding rather than JPEG's Huffman tables, and adaptive block sizes instead of a fixed 8 × 8 grid. In practice this yields files roughly 25 to 35 percent smaller than JPEG at visually matched quality.
WebP's lossless mode is a separate algorithm entirely, competing with PNG rather than JPEG, and typically lands about 26 percent below an optimised PNG. Crucially it supports transparency in both modes — lossy transparency is something PNG cannot do at all, and it is the single biggest win for images that need an alpha channel and are photographic underneath.
Support, and what it means to serve it
WebP is supported in every current browser: Chrome since 2011, Firefox and Edge since 2019, and Safari since version 14 in 2020, including on iOS. For web delivery the compatibility question is effectively settled, and a plain <img src="photo.webp"> is safe.
The remaining gaps are outside browsers. Some older desktop applications, email clients and content management systems still do not accept it, and email in particular should stay on JPEG or PNG because rendering there is far behind the web. If a file is going to a print shop or into a document, send a conventional format.
The robust pattern for a website is the <picture> element with a WebP <source> and a JPEG or PNG <img> fallback. Browsers pick the first format they understand, so modern clients get the smaller file and everything else still works, at the cost of storing two copies.
Converting without compounding losses
Converting an existing JPEG to WebP re-encodes it, and lossy-to-lossy conversion means the WebP encoder is now preserving the JPEG's compression artefacts as though they were image detail. It will still usually be smaller, but you are spending bits on blocking and ringing rather than on the photograph.
Where possible, convert from the original — the camera file, the raw export, the layered document — rather than from a compressed intermediate. If only the JPEG exists, keep WebP quality reasonably high, around 80 or above, since the encoder needs headroom to reproduce the artefacts it has been handed.
For images that are already lossless, choose WebP's lossless mode rather than its lossy one, and do not convert a lossless master to lossy WebP if it will be edited again. As with JPEG, generation loss accumulates across saves. To go back the other way, WebP to PNG restores a universally compatible file, though it cannot recover detail lossy encoding removed.
Convert to WebP — FAQ
Is WebP better than JPG and PNG?
For the web, usually yes. WebP is smaller than both at similar quality and supports transparency like PNG. For print or maximum compatibility with very old software, JPG/PNG can still be safer.
Do all browsers support WebP?
Yes — Chrome, Edge, Firefox, Safari and all major mobile browsers support WebP.
Will the quality drop?
At 80% quality the result usually looks identical to the original while being much smaller. Use the slider to go lossless-ish (higher) or tiny (lower).
Can I convert PNG with transparency?
Yes. Transparency is preserved when converting PNG to WebP. (Converting to JPG would flatten it onto white.)
Is WebP safe to use on a website now?
Yes. Every current browser supports it, including Safari since version 14 in 2020. Use a <picture> element with a JPEG or PNG fallback if you need to cover very old clients, and avoid WebP in email, where support is still poor.
How much smaller will my images get?
Around 25 to 35 percent below JPEG at matched quality, and roughly 26 percent below an optimised PNG in lossless mode. Converting from an already-compressed JPEG yields less, because the encoder must preserve existing artefacts.