VKT Toolkit · August 28, 2026 · 8 min read

How to Convert PNG to AVIF — 4 Methods Compared (Free, No Upload)

PNG has been the gold standard for lossless images with transparency for over two decades. But it's 2026, and PNG files are heavy. A typical screenshot might be 2 MB as PNG and 800 KB as WebP — but just 400 KB as AVIF. That's a 50% size reduction with no visible quality loss.

If you're looking to convert PNG to AVIF, you have several options. Some are free. Some are instant. Some protect your privacy. Only one checks all three boxes. In this guide, we'll walk through four methods — from the most convenient to the most technical — so you can pick the one that fits your workflow.

Why Convert PNG to AVIF?

AVIF (AV1 Image File Format) is the most advanced image compression format available today. Developed by the Alliance for Open Media (the same group behind the AV1 video codec), it represents a generational leap over PNG:

• 50% smaller than PNG at equivalent visual quality — dramatic savings for web performance and storage;
• 20% smaller than WebP — the previous "next-gen" format that's already widely adopted;
• Supports transparency (alpha channel), just like PNG — logos, icons, and screenshots all work;
• HDR and 10-bit color — wider color gamut for professional imaging and next-gen displays;
• Native browser support — Chrome (85+), Edge (85+), Firefox (93+), and Safari (16.4+) all render AVIF natively;
• Animation support — AVIF can replace animated GIFs with much smaller file sizes;
• Future-proof — backed by Google, Apple, Mozilla, Netflix, and other major tech companies.

For web developers, switching from PNG to AVIF can shave seconds off page load times and dramatically reduce bandwidth costs. For everyday users, it means smaller files that are easier to share, store, and upload — without sacrificing quality.

Method 1: Right-Click with VKT ImageConv (Best Overall)

The fastest way to convert PNG to AVIF is with VKT ImageConv, a free Chrome extension. Once installed, the workflow is dead simple:

1. Right-click any PNG image on any website;
2. Select ImageConv → Save as AVIF;
3. Done. The AVIF file downloads instantly.

There's also a "Copy as AVIF" option that puts the converted image directly on your clipboard — perfect for pasting into emails, documents, Slack messages, or chat apps. No file to manage, no download folder clutter.

What Makes ImageConv Different

ImageConv isn't just a converter — it's a complete image format toolkit for your browser:

• 100% local processing — uses the browser's Canvas API for conversion. Your images never leave your device, never touch a server, never get analyzed by third parties;
• Quality adjustment slider — control the AVIF compression level from 1 to 100. Crank it up for pixel-perfect output, dial it down for maximum compression;
• 4 output formats — PNG, JPG, WebP, and AVIF, all accessible via right-click;
• Copy to clipboard — paste converted images directly into any application;
• Cross-origin support — works on images from any website, including CDNs with strict CORS headers, thanks to its Service Worker architecture;
• Smart link cleaning — strips CDN tracking parameters from image URLs for cleaner downloads;
• JPG white fill — when converting transparent PNGs to JPG, transparent areas are filled with white automatically (instead of the black background most tools produce);
• Zero tracking — no analytics, no data collection, no phone-home requests;
• 6 languages — English, Chinese, Japanese, German, Spanish, French;
• Built on Manifest V3 — lightweight, fast, no external dependencies, fully compliant with Chrome's latest security requirements.

Method 2: Chrome Flags (Experimental, No Extension)

Chrome has experimental flags that control image format support, but there's no built-in "convert to AVIF" feature. You can verify AVIF support is enabled with:

1. Open chrome://flags in your address bar;
2. Search for #avif;
3. Ensure AVIF support is set to Enabled (it's on by default in modern Chrome);
4. Restart Chrome if you changed anything.

This only ensures Chrome can display AVIF images in web pages — it doesn't help you convert PNG files to AVIF. Chrome's "Save Image As" feature saves images in whatever format the server sends; it doesn't offer format conversion.

Pros: Built into Chrome, no installation needed. Cons: Doesn't actually convert anything — just enables AVIF rendering. You still need a separate tool for conversion.

Method 3: Online Converters (Squoosh, CloudConvert, etc.)

Several web-based tools can convert PNG to AVIF:

• Squoosh.app — Google's image compression tool. Supports AVIF output with detailed quality controls and a side-by-side comparison view. Excellent for single images;
• CloudConvert — supports batch conversion and many formats. Free tier limited to 25 conversions per day;
• Convertio — similar to CloudConvert with a drag-and-drop interface. Free tier has a 100 MB file size limit;
• FreeConvert — offers AVIF conversion with some format-specific settings. Free tier has daily limits.

These tools work, but they all share the same fundamental problem: you must upload your image to someone else's server. For personal photos, business documents, or sensitive screenshots, that's a privacy concern you shouldn't have to accept.

Additional drawbacks:

• File size limits on free tiers (typically 5–100 MB);
• Conversion queues during peak hours — you might wait 10–30 seconds;
• Some add watermarks or require account creation;
• Your images pass through third-party infrastructure with no visibility into how they're handled;
• Not practical for quick, in-browser conversions while browsing.

For one-off conversions where privacy doesn't matter, online tools are a reasonable option. For daily use, a browser extension is far more convenient.

Method 4: Desktop Software (Photoshop, GIMP, XnConvert)

If you need AVIF conversion as part of a professional workflow, desktop applications offer the most control:

• Adobe Photoshop — AVIF support available via a plugin (not native as of 2026). Requires a Creative Cloud subscription ($20.99+/mo);
• GIMP — free, open-source image editor. Supports AVIF export since version 2.10.22. Full control over compression settings;
• XnConvert — free batch image converter supporting 500+ formats including AVIF. Excellent for processing hundreds of images at once;
• ImageMagick — powerful command-line tool. Supports AVIF with convert input.png output.avif. Requires technical knowledge;
• cavif — dedicated Rust-based PNG-to-AVIF converter. Fast and efficient for command-line workflows.

Pros: Full control over compression settings, batch processing, works completely offline, no browser dependency. Cons: Heavy software to install, overkill for a single image conversion, steep learning curve for command-line tools, requires saving the file locally first.

Comparison: Which Method Should You Use?

Tips for Best Results When Converting PNG to AVIF

• Quality setting matters: AVIF at quality 60–75 usually looks identical to PNG for most images while cutting file size dramatically. Use ImageConv's quality slider to experiment and find the sweet spot for your use case;
• Photographs compress better: Photos with gradients and complex colors see the biggest size reductions (often 60–70% smaller). Simple graphics with flat colors and sharp edges see less benefit, but still improve over PNG;
• Check browser support: AVIF works in Chrome 85+, Edge 85+, Firefox 93+, and Safari 16.4+. If your audience uses older browsers, provide a WebP or PNG fallback using the <picture> element;
• Test transparency: AVIF handles alpha channels well, but some older image viewers and decoders may render transparency differently. Always verify the output in your target environment;
• Consider encoding speed: AVIF encoding is slower than WebP or PNG encoding. For real-time applications (like user uploads), you might want to pre-encode images during build time rather than on-the-fly;
• Use lossless mode when needed: AVIF supports lossless compression too. If you need bit-perfect reproduction (for medical images, for example), use lossless AVIF instead of lossy.

PNG vs. AVIF: When to Use Each

FAQ

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