Finally a truly free unlimited converter! Convert unlimited images online – 100% free, no sign-up required
Menu
CZ | EN
Date published: June 10, 2026
Last update: June 10, 2026
Author: Marek Hovorka
Category: Image Conversion Guides
Tags: avif image optimization, png compression, png to avif, transparent image conversion, website image formats
Learn when converting PNG to AVIF makes sense, how much size you can save, what happens to transparency and quality, and how to get cleaner, faster image delivery with PixConverter.
PNG is one of the most useful image formats on the web, but it is also one of the easiest ways to end up with oversized files. If you work with screenshots, UI assets, product cutouts, diagrams, or transparent graphics, PNG often feels like the safe default. The problem is that safe does not always mean efficient.
That is where AVIF comes in. Converting PNG to AVIF can dramatically reduce file size while keeping visual quality high and preserving transparency. For many modern publishing workflows, that means faster page loads, lighter downloads, and better performance without having to redesign the image itself.
This guide explains when PNG to AVIF conversion is worth it, what changes during conversion, how to avoid common mistakes, and how to decide whether AVIF is the right output for your image. If you want a quick workflow, you can use PixConverter to convert PNG files online and test results in seconds.
Quick action: Ready to try it now?
Convert PNG to AVIF on PixConverter and compare file size, transparency, and visual quality before publishing.
PNG is lossless, widely supported, and great for transparency. Those benefits are real. But PNG also tends to produce much larger files than newer formats, especially when the image contains lots of smooth color variation, gradients, shadows, or large dimensions.
AVIF was designed for much more efficient compression. In many cases, it can preserve a very similar look at a fraction of the file size. That matters for:
If your PNG files are slowing down product pages, blogs, landing pages, or web apps, AVIF is one of the strongest formats to test first.
At a basic level, you are changing from an older raster format that usually stores images losslessly into a newer format that can store images much more efficiently. The most important changes are:
This is the main reason people do it. AVIF often beats PNG by a large margin, especially for images that are not simple flat-color graphics.
This is critical for logos, cutouts, overlays, UI elements, and exported graphics. AVIF supports transparency, so a transparent PNG does not have to become a flat image with a white background.
PNG is lossless by default. AVIF can be visually lossless or lossy depending on settings. In practice, that means you can often get much smaller files, but you need to watch fine edges, text, or tiny interface details if you compress too aggressively.
PNG is still easier in many everyday design and editing workflows. AVIF is better as a delivery format than as a working master in many cases. A smart approach is to keep your original PNG and publish an AVIF copy for the web.
Not every PNG should be converted automatically. The best results usually come from images that benefit from efficient compression but still need transparency or high visual quality.
| Feature | PNG | AVIF |
|---|---|---|
| Compression efficiency | Lower | Much higher |
| Transparency support | Yes | Yes |
| Typical file size | Larger | Smaller |
| Editing compatibility | Excellent | More limited |
| Browser support | Near universal | Strong modern support |
| Best use | Master files, editing, compatibility | Web delivery, performance optimization |
| Lossless workflow | Native strength | Possible, but not always the main benefit |
The most useful takeaway is simple: PNG is often the safer working format, while AVIF is often the smarter publishing format.
There is no fixed percentage because image content matters more than format labels. A flat icon with a few colors behaves differently from a detailed transparent screenshot. Still, many real-world PNG files shrink significantly when converted to AVIF.
You may see modest gains on simple graphics, or very large savings on screenshots, large transparent compositions, and images with gradients, shadows, or photographic detail. That is why testing with your actual assets matters more than relying on generic averages.
If your goal is performance, compare three things after conversion:
That combination tells you whether the conversion is actually useful.
Yes, in most modern workflows, AVIF can preserve transparency. This is one of the biggest reasons it is useful as a PNG replacement for web delivery.
That said, preserving transparency is not the same as preserving every edge perfectly under heavy compression. If the image contains soft shadows, hair details, anti-aliased edges, or subtle transparent transitions, inspect the result carefully. Good conversion settings usually hold up very well, but over-compression can create edge artifacts or softness.
For production work, it is best to preview the AVIF against both light and dark backgrounds. That makes halos and edge issues easier to catch.
If you want smaller files without damaging the image, a careful workflow matters more than just clicking convert once and hoping for the best.
If your PNG already came from a bad export, compression artifacts from earlier steps, or unnecessary scaling, AVIF will not magically fix those issues. Begin with the cleanest master available.
Many PNGs are oversized for how they are actually displayed. If an image appears at 1200 pixels wide on a page, publishing a 4000-pixel version usually wastes bytes. Proper dimensions often reduce file size as much as format switching.
Screenshots, charts, and UI graphics can look excellent in AVIF, but tiny text and hard edges should always be reviewed at 100% zoom.
Use PNG as your source archive or editable master, and AVIF as your optimized output. That gives you flexibility if you later need broader compatibility or a different export target.
An image that looks fine in a file preview may feel slightly softer inside a product card, hero banner, or article layout. Check it on an actual page if performance matters.
Fast workflow tip: Use PixConverter’s PNG to AVIF tool to convert, download, and visually compare your optimized image before replacing the original on your site.
No. AVIF is powerful, but it is not a universal replacement for every PNG file.
PNG can still be the better choice when:
Think of AVIF as a delivery optimization format. It shines when file size and loading speed matter. It does not always replace PNG’s role as a dependable working format.
If your site depends on visual content, PNG to AVIF conversion can directly support performance goals.
Large screenshots and illustrated content often arrive as PNG. Converting those images to AVIF can reduce page weight and improve reader experience on mobile connections.
Transparent product cutouts are a classic PNG use case. Replacing heavy PNGs with AVIF versions can help category pages load faster, especially when many products appear at once.
Interface screenshots, dashboards, and feature illustrations are often exported as PNG. AVIF can reduce the size of these assets while keeping them sharp enough for marketing pages.
If your hero section contains a large transparent image, converting it from PNG to AVIF can reduce the visual cost of your first screen.
Keep your source PNG or layered design file. AVIF is usually best as an output, not your only editable version.
Smaller is not always better. If text gets muddy or edges look smeared, raise quality settings or keep PNG for that asset.
AVIF support is strong in modern environments, but your exact audience may still require fallback planning in some workflows.
If a PNG is already very small, the gains may be too minor to matter. Focus effort where file size is actually a problem.
Sometimes another conversion path is more practical. If you do not need transparency, PNG to JPG can be useful for photos. If you want a widely adopted modern web format, PNG to WebP is another strong option.
PixConverter is built for straightforward online image conversion without making the process feel technical or slow. If you need to convert PNG to AVIF quickly, it helps you move from heavy source files to smaller publish-ready images with less friction.
Common reasons users choose this workflow include:
And because format needs change, PixConverter also supports related tasks. If an optimized file later needs broader compatibility or editing flexibility, you may also use WebP to PNG, JPG to PNG, or HEIC to JPG.
The smartest PNG to AVIF workflow is not blind batch replacement. It is a compare-and-decide process:
This approach gives you most of the performance upside while minimizing quality risk.
It can, depending on settings. In many cases, the reduction is small or hard to notice at normal viewing sizes. But if you push compression too far, edges, small text, and fine detail may soften.
Yes. AVIF supports transparency, which is why it is often used as a more efficient replacement for transparent PNGs on the web.
Sometimes. It can work well, especially for larger web-delivery use. But for logos with extremely sharp edges or broad compatibility needs, PNG or SVG may still be a better fit depending on the asset.
No. It is usually better to keep the original PNG as your source or backup and use AVIF as the optimized publishing version.
AVIF often delivers stronger compression, but WebP may still fit some workflows better. The right choice depends on your content, compatibility needs, and quality targets.
Yes, and it often works very well. Just check tiny text and sharp UI elements before replacing the original PNG.
Converting PNG to AVIF is one of the most practical ways to cut image weight while keeping transparency and strong visual quality. It is especially useful for websites, ecommerce stores, app marketing pages, and content-heavy blogs where oversized PNGs quietly hurt speed.
The key is to use AVIF strategically. Keep PNG as your source when needed, convert the right assets, and review the output instead of assuming every file should switch automatically.
If a PNG is large, transparent, and headed for the web, AVIF is absolutely worth testing.
Use PixConverter to turn bulky PNGs into leaner web-ready files in just a few clicks.
You may also need:
