Try this workflow
- Start with
- 640 × 480 synthetic practice PNG
- Set up
- AVIF, quality 75, Balanced speed
- What to expect
- A genuine AVIF at 640 × 480 with measured bytes and a decoded quality preview.
SMART IMAGE TOOLS IMAGE WORKSPACE
AVIF Converter.
Modern image encoding, with quality you can inspect and savings you can measure.
Your workspace
Processed on your device
Real codecs run on your device in a cancellable worker. Image files are never uploaded. Up to 8 megapixels; animated images use a still frame.
YOUR IMAGELocal files
Start with your image.
Drag and drop a file here, or choose from your device.
Original synthetic practice image · created on your deviceJPGPNGWebPAVIF
Your original files stay on your device.
Before you download
- Inspect edges, text and transparency at 100%.
- Read the byte comparison; encoding is lossy even at quality 100.
Image files stay on your device Works in your browser
A PRACTICAL EXAMPLE
Know what a useful result looks like.
Compare genuine AVIF encoding with the source before choosing an export.
Check before using the result
- Inspect edges, text and transparency at 100%.
- Read the byte comparison; encoding is lossy even at quality 100.
When the result needs work
A larger result is not a saving. Use faster speed or a smaller source if encoding reaches 90 seconds. PNG preserves decoded pixels.
Examples illustrate specific inputs and settings. Actual output size and appearance depend on your file and browser. Practice images are synthetic; they do not contain personal data.
GOOD TO KNOW
A few useful answers.
Is this genuine AVIF encoding?
Yes. A local WebAssembly AVIF codec encodes the pixels; the tool does not rename another format. It also decodes AVIF locally to generate a compatible PNG preview.
Can AVIF be larger than my original?
Yes. Already optimized files, graphics and small images can grow. The tool shows actual measured bytes and does not describe a larger output as a saving. Your original stays unchanged.
Does 100 quality guarantee identical pixels?
No. This AVIF mode uses lossy encoding with 4:4:4 chroma sampling and full-quality alpha. Quality is an encoder setting. Use PNG to preserve the decoded pixels; converting an already lossy image to PNG cannot recover lost detail.
What are the limits?
Use static JPG, PNG or WebP up to eight megapixels, 8192 pixels per side and 50 MB, or AVIF up to 20 MB. Encoding runs in a cancellable worker with a 90-second limit. Large images and slower speed settings take longer.