PNG to AVIF Converter

The PNG File Size Problem

PNG is the go-to format for screenshots, UI elements, logos, and any image requiring transparency. But PNG’s lossless compression comes at a cost: massive file sizes. A single iPhone screenshot saved as PNG can easily reach 2-4 MB. A high-resolution UI mockup? 10-20 MB.

AVIF solves this by offering both lossy and lossless compression with transparency support — delivering 60-80% smaller files than PNG for most use cases.

PNG vs AVIF: Side by Side

Metric	PNG	AVIF (lossy)	AVIF (lossless)
A typical screenshot	2.5 MB	400 KB	1.8 MB
UI mockup with text	8 MB	1.2 MB	5 MB
Logo with transparency	500 KB	80 KB	350 KB
Compression type	Lossless only	Both	Both
Transparency	✅	✅	✅

Best Use Cases

Web Developers

If you’re building websites, replacing PNG assets with AVIF can dramatically improve page load times. A landing page with 5 PNG screenshots (12 MB total) becomes 2 MB with AVIF — a 6× improvement.

UI/UX Designers

Share mockups and designs in AVIF for faster file transfers and smaller email attachments without losing visual clarity.

Documentation

Technical documentation with many screenshots benefits enormously from AVIF compression. A 50-page PDF equivalent with PNG screenshots could shrink from 100 MB to 15 MB.

Quality Recommendations

Since PNG is lossless, converting to AVIF involves choosing a quality level:

• Quality 85-95%: Nearly indistinguishable from the PNG original. Recommended for UI screenshots and graphics with text.
• Quality 70-80%: Good for photographs and images without fine text.
• Lossless AVIF: Set quality to 100% for truly lossless compression — still 20-30% smaller than PNG.

Transparency Preservation

Unlike JPG (which doesn’t support transparency), AVIF preserves the alpha channel from your PNG files. Transparent backgrounds, semi-transparent overlays, and gradient masks all convert correctly.

Browser Compatibility

AVIF is supported by all modern browsers as of 2024:

• ✅ Chrome 85+
• ✅ Firefox 93+
• ✅ Safari 16.4+
• ✅ Edge 85+

For the ~5% of users on older browsers, serve a PNG fallback using the <picture> element:

<picture>
  <source srcset="image.avif" type="image/avif">
  <img src="image.png" alt="Description">
</picture>

This ensures every user sees the image, while modern browsers benefit from the smaller AVIF file.