Free, no account, no watermark. Your AVIF files are turned into WebP inside this browser tab — they are never uploaded to a server.
Nothing leaves your device
No account, no email
Free, and no watermark
Drop your files here
Tap to pick your photos
or
Choose files
Up to 30 files at a time · 60 MB per file
Higher quality means a larger file.
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Why convert AVIF to WebP?
Trades a little file size for noticeably broader support. WebP works in plenty of browsers and desktop tools that AVIF still does not reach.
WebP is the pragmatic choice for anything served on the web: meaningfully lighter pages and faster loads, without the support gaps AVIF still carries.
How to convert AVIF to WebP
Drop your AVIF files into the box above, or click to pick them from your device.
Adjust the quality slider if you want a smaller file or a sharper result.
Hit convert. The work happens inside your browser, so it takes a second or two per image.
Download each WebP file, or grab them all in one ZIP.
About the formats
AVIF — AV1 Image File Format
AVIF is the newest format here, built on the AV1 video codec. It beats WebP by another 20–30% on size, handles HDR and wide colour gamut, and supports transparency and animation. Encoding is slow and desktop support is still patchy, but for images delivered over the web it is the most efficient option browsers actually understand.
Strengths
The smallest files of any format with real browser support
HDR and 10-bit colour, so gradients do not band
Transparency and animation included
Limitations
Slow to encode compared with JPEG or WebP
Older browsers and most desktop applications cannot open it
Editing software support remains thin
WebP
WebP is Google's attempt to replace both JPEG and PNG with a single format. It handles lossy and lossless, keeps transparency and animation, and typically comes in 25–35% smaller than an equivalent JPEG. Every browser released in the past several years supports it, which is why so much of the web now serves it.
Strengths
25–35% smaller than JPEG at matched quality
Transparency and animation in one format
Supported by every current browser
Limitations
Desktop software from before 2020 often cannot open it
Print shops and photo labs frequently reject it
Its lossy mode smooths fine texture more aggressively than JPEG
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Frequently asked questions
Are my photos uploaded anywhere?
No. The conversion runs entirely in your browser using WebAssembly and the Canvas API. Your images are never sent over the network, never touch a server, and are dropped from memory as soon as you close the tab.
Will I lose quality?
WebP is a lossy format, so some data is discarded. At the default quality of 85% the difference is invisible on screen for most photos. Raise the slider if you plan to print or edit the result.
Is there a limit or a cost?
It is free and there is no account. The only limits are practical: 30 files at a time and 60 MB per file, so that the tab does not run out of memory on a phone.
Can I convert several files at once?
Yes — drop in up to 30 files and they are processed one after another, then downloaded individually or as a single ZIP.
Does it work offline?
Once the page has loaded, yes. The converter itself needs no network connection, so you can drop the connection and keep converting.
Does it work on a phone?
Yes, on iOS and Android. Large batches are slower on a phone because the decoding happens on the device, so stick to smaller groups if things feel sluggish.