Convert PNG to AVIF
Free, unlimited PNG to AVIF conversion that runs entirely inside your browser. No upload, no sign-up, no watermark.
Convert your PNG files to AVIF
or drop them here, or paste with Ctrl+V · files never leave your device
Settings
Nothing queued yet. Add as many files as you like — everything runs on your own device.
Nothing is uploaded
Conversion runs in your browser. Your files never touch a server, so there is no copy of them to leak.
No sign-up, no watermark
No account, no email, no daily limit, and nothing stamped across your image.
Batch and folders
Drop a hundred files at once and download the results as a single ZIP.
Works offline
Once this page has loaded you can disconnect entirely and it still works.
This converter turns PNG images into AVIF files without uploading anything. The conversion runs inside this page using your own device's processor, so your photos never leave your computer — there is no server copy to worry about, no queue to wait in, and no limit on how many files you convert.
PNG is the lossless format of choice for screenshots, logos and any image that needs a transparent background. Universal across browsers, operating systems and design software. AVIF, by contrast, all current browsers decode AVIF. Outside the browser, support is still thin — which is usually why you need it converted.
Converting to AVIF is a page-speed exercise: it typically cuts image weight by a third or more with no visible difference, which shows up directly in Core Web Vitals. Keep the original PNG as your master copy and serve the AVIF version.
How to convert PNG to AVIF
- Add your PNG files. Drag them onto the box above, click to browse, or paste an image straight from your clipboard. You can add as many at once as you like.
- Adjust the settings if you need to. The defaults suit most images. Raise the quality slider if the image contains text or flat colour.
- Download the AVIF file. Each file gets its own download button as soon as it finishes, and you can pull the whole batch down as a single ZIP.
What changes when you convert PNG to AVIF
Every format conversion involves trade-offs, and vague tools hide them. Here is exactly what happens to your image in this particular conversion.
- Transparency is preserved: both PNG and AVIF carry a full alpha channel.
- PNG is lossless and AVIF is lossy, so this conversion discards some detail permanently. At the default quality the difference is invisible on photographs, but flat colour, screenshots and text will show faint halos — keep the quality high for those.
- AVIF encoding is genuinely slow — it runs the AV1 compressor in your browser. A large photo can take several seconds. The payoff is a file substantially smaller than the equivalent JPG.
What happens to the file size
Measured, not estimated: two 1200 x 800 pixels references — a photograph and a flat-colour graphic — put through this converter.
| Reference image | As PNG | As AVIF | Change |
|---|---|---|---|
| Photograph | 1.67 MB | 104 KB | -94% |
| Graphic with text | 40 KB | 4 KB | -91% |
Yours will differ: size depends more on what is in the picture than on the formats involved.
About PNG (Portable Network Graphics)
PNG is the lossless format of choice for screenshots, logos and any image that needs a transparent background.
Where you probably got it: Screenshots, logos, design exports, and graphics with transparency.
Strengths
- Completely lossless — pixels survive unlimited re-saves untouched
- Full 8-bit alpha transparency, including soft edges and drop shadows
- Perfect for text, screenshots, line art and flat colour
Limitations
- Much larger than JPG or WebP for photographs
- No animation (APNG exists but is patchily supported)
- No quality dial — you cannot trade detail for size
About AVIF (AV1 Image File Format)
AVIF is a modern format built on the AV1 video codec, producing the smallest files of any widely supported image format.
Support: All current browsers decode AVIF. Outside the browser, support is still thin — which is usually why you need it converted.
Strengths
- Typically 30–50% smaller than JPG at visually identical quality
- Handles transparency, HDR and wide colour gamut
- Royalty-free and supported in all current browsers
Limitations
- Encoding is computationally expensive — noticeably slower than JPG or PNG
- Very little support outside browsers: most desktop and print software cannot open it
- Can smear fine texture at aggressive settings
Is it safe to convert PNG online?
Here, yes — and you can check rather than trust. Open your browser’s developer tools, switch to the Network tab and convert a PNG file: no request carrying your image is made. Disconnect from the internet after this page has loaded and the converter still works, which would be impossible if a server were doing the conversion.
That is worth verifying wherever you convert, because most online converters do upload, and PNG files are so often screenshots of statements, invoices and internal dashboards, which people rarely think of as sensitive until they are on a stranger’s server. Once a file is on somebody else’s server you are relying on a privacy policy rather than on anything you can observe. We wrote up how to tell a safe converter from a risky one in more detail.
Frequently asked questions
How do I convert PNG to AVIF?
Drag your PNG file onto the box above, or click it to browse. The conversion starts immediately in your browser and the AVIF download appears within a second or two for most images. You can drop in a whole folder of files at once and download them together as a ZIP.
Are my PNG files uploaded to a server?
No. The conversion happens locally in your browser, so your files are never transmitted anywhere — the tool even works with the network disconnected once the page has loaded. That is also why there is no file size or file count limit: nothing costs us anything per conversion. The practical ceiling is your own device's memory, which on a phone means very large images may fail.
Will converting PNG to AVIF reduce the quality?
Slightly, by design. AVIF is a lossy format, so it approximates the image to save space. At the default quality setting the loss is invisible on photographs; on screenshots and text you may see faint halos, so raise the quality slider or choose PNG instead.
What is the difference between PNG and AVIF?
PNG is the lossless format of choice for screenshots, logos and any image that needs a transparent background. AVIF is a modern format built on the AV1 video codec, producing the smallest files of any widely supported image format. In practice the choice comes down to compatibility: universal across browsers, operating systems and design software. Meanwhile all current browsers decode AVIF. Outside the browser, support is still thin — which is usually why you need it converted.