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AVIF to WebP Converter

AVIF makes tiny files, but many editors and older apps cannot open it. Converting to WebP gives you files roughly 25–35% smaller than JPG at the same visual quality — ideal for websites. Encoding is slow and application support lags well behind browsers. Older editors, office suites, printers and any number of internal tools simply will not open an .avif, so a file that displays perfectly in a browser can be unusable in the software you actually need. Images going onto a website, where the 25–35% saving over JPEG is bandwidth and Core Web Vitals rather than an abstraction. Drop your files below; everything runs locally through the Canvas API, with no upload, no size limit and no account. Check where the result has to open before you commit to a batch — every current browser reads WebP, but desktop and office software is patchier, so it is a format to publish in rather than to hand to somebody.

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What an AVIF file actually is

AVIF wraps the royalty-free AV1 video codec as a still-image format. It compresses harder than anything else in wide use — commonly around half the size of an equivalent JPEG — and adds real range: 10- and 12-bit colour, HDR, wide gamut and an alpha channel.

AVIF files come from modern websites and image pipelines that adopted it for the bandwidth saving. Chrome shipped support in 2020 and Safari in 16.4 in 2023, so it is common on the web and rare on the desktop.

What you get from WebP

WebP output uses lossy compression with a quality control, but unlike JPEG it can keep an alpha channel at the same time — one format for photographs and for graphics with transparency.

Every current browser reads WebP; Safari joined in version 14 in 2020, which was the last real holdout. Desktop applications are patchier, so it is a format to publish in rather than to archive in.

What changes when you convert AVIF to WebP

Both formats are lossy, so this is a re-encode rather than a copy: the AVIF is decoded to pixels and those pixels are compressed again as WebP. Detail the original already discarded cannot come back, and the second pass removes a little more. One generation at a sensible quality is not something you will notice, and WebP's efficiency means the result usually lands close to or below the original's size — a rare case where re-encoding does not cost you space.

Transparency survives intact. Both AVIF and WebP carry a full 8-bit alpha channel, so cut-outs, drop shadows and anti-aliased edges convert without a white box appearing behind them, and the result still composites cleanly onto any background colour.

One thing worth checking before you convert: AVIF can store 10- and 12-bit colour, HDR and a wide gamut, and WebP cannot. If the file came from an HDR pipeline it is tone-mapped down to 8-bit SDR here, which is usually invisible on an ordinary screen but flattens the highlight range a display capable of showing it would have used.

Frequently asked questions

Is this AVIF to WebP converter really free and private?

Yes. Conversion happens entirely in your browser using the Canvas API — your AVIF images are never uploaded to a server, there is no file limit, no watermark and no sign-up.

Can I convert multiple AVIF files at once?

Yes — drop any number of files and they convert in one batch. Use "Download all" to save the results as a single ZIP.

Does converting AVIF to WebP lose quality?

Both formats are lossy, so this is a re-encode rather than a copy: the AVIF is decoded to pixels and those pixels are compressed again as WebP. Detail the original already discarded cannot come back, and the second pass removes a little more. One generation at a sensible quality is not something you will notice, and WebP's efficiency means the result usually lands close to or below the original's size — a rare case where re-encoding does not cost you space.

Will a WebP file open on every device?

In a browser, yes — every current browser has supported WebP since Safari 14 in 2020. Outside the browser it is less certain: older desktop editors, some print workflows and a number of CMS uploaders still reject it. Use WebP for the web and JPG or PNG for anything you are handing to someone else.

AVIF looks great — why convert away from it at all?

Support outside the browser. Older editors, office suites, print portals and plenty of internal tools cannot open an .avif at all, so a file that displays perfectly on a web page is unusable in the software you actually need.

Related conversions

JPG → WebPPNG → WebPHEIC → WebPAVIF → JPGAVIF → PNGAVIF → ICO

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