Convert PNG to AVIF Online Free

Shrink your PNG images by converting to AVIF — the next-generation image format that delivers up to 50% smaller files than PNG at similar visual quality.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

To convert PNG to AVIF, drop your PNG file into the converter above. ChangeThisFile re-encodes the image as AVIF directly in your browser using the Canvas API. The conversion is instant and your files never leave your device. AVIF produces dramatically smaller files than PNG.

Free No signup required Files stay on your device Instant conversion Updated March 2026

Convert PNG to AVIF

Drop your PNG file here to convert it instantly

Drag & drop your .png file here, or click to browse

Convert to AVIF instantly

PNG vs AVIF: Format Comparison

Key differences between the two formats

Feature	PNG	AVIF
Compression	Lossless (deflate)	AV1-based lossy/lossless
File size	Large for photos	50-80% smaller than PNG
Transparency	Yes (alpha channel)	Yes (alpha channel)
Color depth	Up to 48-bit	Up to 12-bit HDR
Animation	No (use APNG)	Yes
Browser support	Universal	Chrome 85+, Firefox 93+, Safari 16.4+
Best for	Graphics, screenshots, lossless	Modern web delivery, small files

When to Convert

Common scenarios where this conversion is useful

Optimizing website images

AVIF typically reduces PNG file sizes by 50-80%, dramatically improving page load speed. Serve AVIF to modern browsers for the best performance scores.

Saving storage and bandwidth

Large PNG image libraries eat storage fast. Convert to AVIF to reclaim disk space while retaining transparency support and high visual quality.

Progressive web apps

PWAs need to minimize asset size for offline caching. AVIF delivers the smallest file sizes of any widely-supported image format, keeping your app's cache footprint small.

Responsive image pipelines

Generate AVIF versions alongside PNG/WebP for picture elements. Modern browsers get the smallest file while older browsers fall back gracefully.

Who Uses This Conversion

Tailored guidance for different workflows

Designers

Convert PNG mockups to AVIF for sharing with clients who need a universally compatible format
Transform PNG design assets to AVIF for embedding in presentations or documents

Check the converted AVIF at full zoom to verify no visible artifacts in gradients or fine details

Keep the original PNG as your master copy in case you need to re-export later

Web Developers

Convert PNG images to AVIF for optimized loading on websites and web applications
Transform PNG assets to AVIF for cross-browser compatibility in production builds

Test the converted AVIF file in both Chrome and Safari to ensure consistent rendering

Consider the file size difference between PNG and AVIF when optimizing page load speed

Photographers

Convert PNG photos to AVIF for uploading to stock photography platforms or portfolios
Batch convert PNG images to AVIF for delivering client galleries in a widely supported format

Use the highest quality setting when converting to AVIF to preserve fine detail in your photos

Verify color accuracy after conversion, as PNG and AVIF may handle color profiles differently

How to Convert PNG to AVIF

1

Drop your PNG file

Drag and drop your PNG image into the converter area, or click browse to select it from your device.
2

Instant browser conversion

Your browser decodes the PNG and re-encodes it as AVIF using the Canvas API. No server upload, no waiting — conversion happens locally.
3

Download the smaller AVIF

Save the converted AVIF file. You'll typically see a 50-80% reduction in file size compared to the original PNG.

Frequently Asked Questions

How much smaller will the AVIF be compared to PNG?

For photographs, expect a 50-80% reduction in file size. For graphics and screenshots with flat colors, savings are typically 30-60%. The exact reduction depends on image complexity.

Does AVIF keep transparency from PNG?

Yes. Unlike JPG, AVIF fully supports alpha channel transparency. Your transparent PNGs will retain their transparency when converted to AVIF.

Which browsers support AVIF?

Chrome 85+, Firefox 93+, Safari 16.4+, and Edge 121+ all support AVIF. For older browsers, consider using WebP as a fallback or serving PNG to unsupported clients.

Is there visible quality loss?

AVIF can encode in both lossy and lossless modes. The browser's default encoding produces high-quality results that are visually indistinguishable from the source for most photographs. Graphics with sharp edges may show subtle differences.

Is this conversion private?

Yes. The entire conversion happens in your browser using JavaScript and the Canvas API. Your PNG files are never uploaded to any server — they stay on your device.

Why choose AVIF over WebP?

AVIF generally produces 20-30% smaller files than WebP at the same visual quality. It also supports wider color gamuts and HDR. However, WebP has broader browser support, so many sites serve both.

Can I convert multiple PNGs to AVIF at once?

Yes. Drop multiple PNG files into the converter and they'll all be processed simultaneously in your browser. Each file is converted independently.

Will the image dimensions change?

No. The AVIF output has exactly the same pixel dimensions as your original PNG. Only the file format and compression method change.

Does this work on mobile?

Yes, if your mobile browser supports AVIF encoding. Chrome and Safari on iOS 16.4+ can handle PNG to AVIF conversion directly on your phone.

Should I use AVIF for all my website images?

AVIF is ideal for photos and complex images on modern websites. For simple icons or logos with few colors, SVG or PNG may still be better choices. Use the HTML picture element to serve AVIF with PNG/WebP fallbacks.