Free PNG to AVIF Converter - Fast Browser Tool

Create compact AVIF images directly in your browser. Preserve transparent pixels, control image and alpha quality, resize oversized PNG files, process batches, and download individual AVIF files or one ZIP archive.

Convert PNG Images See how it works
No image uploads Transparency support Real AVIF encoding Batch and ZIP export

PNG to AVIF Converter

Add PNG images, choose your AVIF settings, and process them sequentially using a browser-compatible WebAssembly encoder.

Images stay local

Drop PNG images here

or browse from your device to select multiple files

Up to 30 files · 50 MiB each · 250 MiB total · 30 MP each
72

Higher values retain more image detail but usually increase output size.

85

Controls transparent-edge quality independently from image color.

6 · Balanced

Lower values use more effort; higher values finish faster.

Smaller images are never enlarged or cropped.

4:4:4 retains more color-edge detail and can produce larger files.

Lossless AVIF

Forces quality 100 and 4:4:4. It can be slow or larger than PNG.

Preparing encoder… 0%
Files 0
Converted 0
PNG input 0 B
AVIF output 0 B
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Conversion queue

No files selected
Your PNG images and converted AVIF results will appear here.
Selected images are decoded, resized, and encoded on this device. Network access is only used to load the pinned JavaScript and WebAssembly encoder assets.

01
Private processing No image upload step
02
Alpha support Transparent pixels retained
03
Verified AVIF ISO BMFF brand validation
04
Flexible export Individual files or ZIP
Modern image conversion

Convert PNG to AVIF without uploading images

This PNG to AVIF converter decodes PNG files into browser-managed pixels and passes them to a WebAssembly AVIF encoder. The result is a genuine AVIF file rather than a renamed PNG or an unsupported Canvas export.

PNG is normally lossless, while AVIF can use either lossy or lossless compression. For photographs, illustrations, product images, and complex graphics, lossy AVIF can substantially reduce file size while maintaining strong visual quality.

Transparency and alpha quality

Transparent PNG pixels remain available to the AVIF encoder. The separate alpha-quality control lets you retain cleaner semi-transparent edges without forcing maximum color quality.

Important conversion limitations

The converter creates an 8-bit still AVIF. APNG animation is not retained. PNG metadata, textual chunks, timestamps, embedded ICC profiles, and other non-pixel data are not copied into the resulting AVIF.

Complete conversion workflow

A capable browser-based PNG to AVIF encoder

Real controls, transparent limitations, sequential processing, and validated output for safer image conversion.

Local image processing

Images are processed by browser APIs and WebAssembly on your device.

Transparency preservation

RGBA pixel processing retains transparent and semi-transparent PNG areas.

Actual speed control

Choose more compression effort or faster completion using the encoder speed setting.

Memory-conscious batches

Images are converted sequentially instead of running multiple heavy encoders together.

Source and output previews

Inspect both images in a keyboard-accessible, transparency-friendly preview dialog.

AVIF and ZIP downloads

Download individual results or export completed AVIF files in one stored ZIP archive.

Three simple stages

How to convert PNG to AVIF

No account, server upload, or desktop application is required.

Step 1

Add PNG images

Select or drop PNG files. Type, signature, size, duplicates, and batch limits are checked.

Step 2

Encode with WebAssembly

The browser decodes, optionally resizes, and converts each PNG into a validated AVIF file.

Step 3

Review and download

Compare sizes and previews, then download one AVIF or all completed results in a ZIP.

Format comparison

PNG and AVIF solve different image needs

AVIF can reduce delivery size, while PNG remains valuable for compatibility, exact source storage, and simple lossless graphics.

Characteristic PNG AVIF Practical meaning
Compression Lossless DEFLATE compression Lossy or lossless AV1-based compression AVIF can reduce complex photographic and illustrated image sizes.
Transparency Full alpha support Alpha support Transparent PNG pixels can remain transparent after conversion.
Encoding effort Usually moderate Often CPU-intensive Large or lossless AVIF conversions can take noticeably longer.
Metadata in this converter May contain ancillary chunks Pixel-derived output only PNG metadata and embedded profiles are not copied.
Animation Possible through APNG Still output from this tool This converter does not preserve APNG animation.
Legacy compatibility Extremely broad Designed for modern software Keep PNG fallbacks where older clients must be supported.
Conversion guidance

PNG to AVIF best practices

1

Start around quality 72

Review the actual output and adjust for your image instead of assuming one universal value.

2

Protect transparent edges

Use a higher alpha-quality value for logos, overlays, shadows, and semi-transparent artwork.

3

Use 4:4:4 for graphic content

Text, icons, colored edges, and interface captures can benefit from full chroma detail.

4

Resize before expensive encoding

Reducing unnecessary dimensions saves processing time, memory, and delivery bytes.

5

Compare lossless output

Lossless AVIF is not guaranteed to beat an optimized PNG, especially for simple images.

6

Keep your original PNG files

Metadata and higher bit depth are not retained, so AVIF output should remain a derivative.

Common questions

PNG to AVIF converter FAQ

Is this PNG to AVIF conversion private?

Yes. Your PNG images are decoded and encoded locally in your browser. The page downloads its encoder files from a CDN, but the selected images are not uploaded by this converter.

Does PNG transparency remain transparent in AVIF?

Yes. Transparent PNG pixels are passed to the AVIF encoder with their alpha channel. The alpha quality setting controls lossy alpha compression unless lossless mode is enabled.

What AVIF quality should I use for PNG images?

Quality 65 to 80 is a practical starting range. Use higher values for text, graphics, gradients, and fine edges, or lower values when reducing file size is more important.

Does lossless AVIF always create a smaller file than PNG?

No. Lossless AVIF can be smaller or larger depending on the image. Simple icons and optimized PNG files may not benefit, and lossless encoding is usually slower.

Are PNG metadata and color profiles preserved?

No. The browser converts the PNG into a pixel buffer, so textual metadata, timestamps, embedded color profiles, and other PNG chunks are not copied into the AVIF output.

What happens to animated PNG and 16-bit PNG files?

The converter creates an 8-bit still AVIF from the frame decoded by the browser. APNG animation is not retained, and higher bit-depth PNG data is converted through the browser canvas pipeline.

Why can PNG to AVIF conversion take a long time?

AVIF encoding is computationally intensive. Large dimensions, high quality, low speed values, 4:4:4 chroma, detailed transparency, and lossless mode can increase processing time and memory use.

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Related image conversion tools

Convert PNG and AVIF files for other compatibility and delivery workflows.

Image conversion

PNG to JPG

Convert transparent or lossless PNG images into widely supported JPG files.

 Modern image format

PNG to WebP

Create compact WebP images with broad modern-browser compatibility.

 Reverse conversion

AVIF to PNG

Decode AVIF images into transparent, lossless PNG output.

Ready to convert PNG images to AVIF?

Create modern AVIF files with transparency support, adjustable quality, resizing, previews, batch processing, and ZIP export-all inside your browser.

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