Convert PNG images to AVIF without uploading them
AVIF is a modern image format that compresses far better than PNG for photographic and flat-colour images alike, while still supporting transparency. This tool re-encodes your PNGs as AVIF with a quality slider you control, so you can trade size against fidelity.
Everything runs locally in your browser — your images are never uploaded, stored, or seen by anyone. That makes it both faster (no upload wait) and private by design. AVIF encoding needs a recent browser (Chrome, Edge, Firefox or Safari); if yours can’t encode AVIF, the tool will tell you.