Browser-local converter

AVIF to PNG Converter

Convert AVIF still images to PNG with bounded browser work and verified output bytes.

Output: image/pngExtension: .pngSource metadata not preserved

Bounded local intake

Add still raster images

Binary signatures and dimensions are checked before files enter the queue. Animated, multi-image, truncated, and structurally ambiguous inputs are rejected.

Accepted signatures: AVIF · up to 30 files within one decoded-work budget · paste with Ctrl/Cmd+V

Verified destination

Output contract

image/png · .png

Presets

Lossless PNG. Alpha is retained when the browser decoder exposes it.

PNG has no quality slider.The browser emits lossless PNG bytes.

Maximum widthOptional maximum; aspect ratio is retained and images are not enlarged.Maximum heightOptional maximum; aspect ratio is retained and images are not enlarged.

Output filename patternUse {name} for the local source stem and {index} for a padded queue number. Unsafe path characters and duplicate names are corrected before download.

Bounded queue

0 files checked

No file bytes are retained yet. Add files above to run signature, dimension, and browser-decode checks.

Metadata outcome

Browser-decoded orientation is rendered into output pixels; manual orientation controls are not provided here.
EXIF, GPS, capture date, and source metadata are stripped by canvas re-encoding.
ICC profiles are not preserved; browser color conversion may change wide-gamut or HDR sources to SDR.
Alpha is retained only when both decoder and output support it.

Local boundary

Selecting a file gives this tab temporary local access to its bytes. Conversion code runs in the browser and this workflow does not send file bytes, names, content, or precise dimensions to analytics. Ordinary page requests and coarse product events still use the network. Files and object URLs remain until you remove them, clear the workbench, or close the tab.

Raster work is limited to one or two concurrent browser jobs. Some canvas work can still occupy the main thread; cancellation is cooperative and an in-flight browser decode may finish before its result is discarded.

Instructions

How this conversion works

01Select .avif files. The browser checks type and total work before processing.
02Review the PNG controls and start conversion. Unsupported browser decoders are reported as a retryable file error.
03Download output only after its MIME, signature and extension contract passes.

Limitations

Read before processing

Files are processed in browser memory. Site assets and coarse analytics still use ordinary network requests; file bytes and names are excluded from events.
Canvas-based output does not preserve source EXIF, GPS, capture date or embedded ICC profiles.
A download is exposed only when the result reports PNG bytes that agree with its MIME and extension.

How to convert AVIF to PNG

1. Add AVIF files for bounded signature and decoder checks.

2. Review PNG controls and the decoded-work estimate.

3. Start the cancellable queue.

4. Download files only after output validation passes.

Capability boundary

AVIF decoding depends on browser codec support. Alpha is retained only when the decoder exposes it.

Questions

Frequently asked questions

How is PNG output checked?

The browser encoder must return the expected MIME and binary signature. The result is decoded again and its dimensions are checked before download.

What happens to source metadata?

Canvas re-encoding strips EXIF, GPS and capture date. ICC profiles are not preserved, and HDR or wide-gamut input may be converted to SDR.

Next workflows

jpgAVIF to JPG ConverterOpen capability contract →pngWebP to PNG ConverterOpen capability contract →jpgPNG to JPG ConverterOpen capability contract →