01
Image Compressor
Compresses images to a target quality or file size in your browser, with a live…
JPG to AVIF Converter
Converts a JPEG or PNG to AVIF and verifies the result really is AVIF, because browsers return a PNG silently when they cannot encode it.
Image
Nothing uploaded
No sign-up
Free, unlimited
Drop a JPEG or PNGthe output format is verified, not assumed
AVIF holds up at lower numbers than JPEG — 50 to 65 is usually plenty.
Add a file to begin.
In short
Browsers can display AVIF everywhere but cannot all create one, and the failure is silent: asking a canvas for image/avif in a browser without an encoder returns a PNG with no error at all, so many online converters hand back a mislabelled PNG that is larger than the file you gave them. The JPG to AVIF converter on inputtesthub.com checks the resulting blob's type against what was requested and refuses to offer a file that is not genuinely AVIF, suggesting WebP instead when the browser cannot do it. Chrome and Edge can encode AVIF today; for guaranteed results outside a browser, avifenc or ImageMagick will do it.
How to use the JPG to AVIF Converter
- Drop a JPEG or PNG in.
- Set the quality — AVIF stays clean well below where JPEG falls apart.
- Check the verified format line before using the file.
About the JPG to AVIF Converter
The JPG to AVIF Converter converts a JPEG or PNG to AVIF and verifies the result really is AVIF, because browsers return a PNG silently when they cannot encode it. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Shrinking images for a site that serves AVIF.
- Comparing AVIF against WebP on your own photographs.
- Checking whether your browser can encode AVIF at all.
Details
| Decoding | Supported by every current browser |
|---|---|
| Encoding | Chrome and Edge yes; others still catching up |
| The silent failure | An unsupported request returns image/png |
| Typical saving | 40–50% against JPEG at the same quality |
| Serve it with | A <picture> fallback to WebP and JPEG |
The verified-format line is the reason this page exists. Any converter that skips that check will, in a browser without an AVIF encoder, quietly produce a PNG — and the user finds out when a server rejects the upload or the file turns out to be three times bigger than the JPEG it replaced.
Where this tool stops
Uses the browser's own encoder at its default settings. A dedicated encoder given time to work exposes speed, chroma subsampling and tiling, and will beat this on both size and quality.
Frequently asked questions
Why did it refuse to give me a file?
Because your browser cannot encode AVIF, and it does not report that honestly. A canvas asked for AVIF in that situation returns a PNG with no error, and handing you a PNG named <code>.avif</code> would be worse than useless — it would be larger than your original and rejected by anything that checks the file's magic bytes. WebP is offered instead when it is available.
What quality should I use?
Lower than you would for JPEG. AVIF holds detail much better at low settings, and 50 to 65 usually looks indistinguishable from the original while being dramatically smaller. Above about 80 the returns fall away quickly.
Can I just use AVIF everywhere now?
Nearly. Decoding is very widely supported, but older devices and some email clients still miss it, and a bare <code><img src="x.avif"></code> shows nothing at all rather than degrading. Use a <code><picture></code> element with WebP and JPEG sources beneath it.
Is the JPG to AVIF Converter free?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Does anything I enter leave my computer?
No. The JPG to AVIF Converter runs entirely in your browser using JavaScript. Because the work happens locally, the utility also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
Who is the JPG to AVIF Converter for?
The jobs it is built for: shrinking images for a site that serves AVIF. Comparing AVIF against WebP on your own photographs. Checking whether your browser can encode AVIF at all. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Where does the JPG to AVIF Converter stop being reliable?
Uses the browser's own encoder at its default settings. A dedicated encoder given time to work exposes speed, chroma subsampling and tiling, and will beat this on both size and quality. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What are the key numbers for the JPG to AVIF Converter?
Decoding is Supported by every current browser. Encoding is Chrome and Edge yes; others still catching up. The silent failure is An unsupported request returns <code>image/png</code>. These are printed on the page itself, so you do not have to take them on trust.
How large a file can I use?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.
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