Finally a truly free unlimited converter! Convert unlimited images online – 100% free, no sign-up required
Menu
CZ | EN
Date published: July 19, 2026
Last update: July 19, 2026
Author: Marek Hovorka
Category: Image Conversion Guides
Tags: convert png to avif, Image optimization, png to avif, transparent images, website performance
Learn when it makes sense to convert PNG to AVIF, how much size you can save, what happens to transparency and quality, and how to get cleaner website image delivery with the right workflow.
PNG is still one of the most common image formats on the web, especially for screenshots, interface elements, logos, icons, and graphics that need transparency. The problem is that PNG files can become heavy very quickly. If you are trying to speed up a website, reduce bandwidth use, or make image uploads more efficient, one of the smartest upgrades to test is converting PNG to AVIF.
AVIF is a modern image format built for much better compression than older standards. In many cases, it can preserve the clean edges and transparency people expect from PNG while cutting file size dramatically. That makes it highly attractive for site owners, designers, developers, and anyone managing image-heavy pages.
But converting every PNG to AVIF is not automatically the right move. Some images benefit a lot. Others may be better as PNG, or even as WebP or JPG depending on how they are used. This guide explains what really changes when you convert PNG to AVIF, where the biggest gains usually come from, what quality risks to watch for, and how to choose the best workflow.
Need to convert now?
Use PixConverter to quickly process your image files online and test whether AVIF gives you a better size-to-quality result for your PNG assets.
The core reason is simple: PNG is often much larger than necessary for web delivery.
PNG uses lossless compression, which is great when you need exact pixel preservation. That is one reason it remains popular for screenshots, UI graphics, and transparent assets. But lossless compression also means file sizes can stay high, especially with large dimensions, lots of color variation, or alpha transparency.
AVIF was designed with modern compression efficiency in mind. It often delivers:
If your current PNG library is slowing down product pages, landing pages, blog posts, or app interfaces, AVIF is one of the first formats worth testing.
The biggest advantage is compression efficiency. A transparent PNG can often be reduced significantly when converted to AVIF. The exact savings vary by image type, but in real use cases, it is common to see meaningful reductions without obvious visual damage.
This matters because every extra kilobyte affects load speed, mobile performance, and overall page responsiveness.
One reason PNG has survived for so long is that it handles transparent backgrounds reliably. AVIF also supports transparency, which makes it useful for many of the same practical scenarios:
If transparency is the only reason you stayed with PNG, AVIF may give you a much lighter alternative.
When properly supported in your delivery stack, AVIF can reduce total image payload and improve perceived speed. That can help with:
While image format alone will not fix a slow website, reducing oversized PNG assets can make a measurable difference.
Not all images behave the same after conversion. The best candidates usually fall into a few categories.
Large PNG screenshots are common in documentation, app landing pages, SaaS feature pages, and support centers. These often contain text, boxes, panels, and flat interface colors. PNG keeps them clean, but can be bulky. AVIF can often shrink them substantially while keeping them visually acceptable for web display.
Many websites use PNG for badges, decorative overlays, feature graphics, and cutout objects. If these assets are being delivered at scale, converting them to AVIF can reduce weight while preserving transparent backgrounds.
Content-heavy sites often rely on exported PNG graphics from design tools. If those images do not need strict pixel-perfect lossless preservation, AVIF may be a better publishing format.
Some product labels, spec diagrams, comparison cards, and promotional graphics are saved as PNG for convenience. Converting selected assets to AVIF can lighten collection pages and marketing sections.
Even though AVIF is powerful, there are cases where PNG remains the better choice.
If a PNG is acting as an editable master asset in your workflow, keep the original. Conversion formats are for delivery, not for replacing your source archive.
If you need absolute pixel integrity for technical, scientific, UI QA, or print-prep reasons, PNG may still be safer.
AVIF support is strong in modern browsers, but not universal across every legacy app, CMS workflow, email client, or internal system. If the image must work everywhere without fallback, PNG may still be more practical.
Some tiny assets may not benefit enough to justify changing your workflow. Testing matters more than assumptions.
| Feature | PNG | AVIF |
|---|---|---|
| Compression type | Lossless | Modern, highly efficient compression |
| Typical file size | Larger | Usually much smaller |
| Transparency support | Yes | Yes |
| Best for | Editing, exact preservation, broad compatibility | Web delivery, optimization, smaller assets |
| Browser support | Universal | Strong in modern browsers |
| Ideal use case | Source files and compatibility-first workflows | Performance-focused publishing |
Sometimes yes, but often less than people expect.
The real question is not whether there is any technical change. The question is whether the visible result still looks excellent for the intended use. For web publishing, the answer is often yes.
That said, image quality after conversion depends on several factors:
For example, a decorative transparent illustration may convert beautifully. A screenshot filled with tiny UI text may require more careful settings. A logo may stay sharp, but should still be reviewed closely against the original.
The best approach is to compare the converted AVIF against the original PNG at actual display size, not just by zooming in to 300%.
A good conversion workflow is not just about changing the extension. It is about making sure the output is right for real use.
If the PNG was already exported poorly, oversized, or generated from a low-quality source, conversion will not magically fix that. Use the best original version available.
If it is a source file, keep PNG. If it is being published to a website or app, AVIF may be the better output format.
Many PNGs are oversized. If an image will display at 1200 pixels wide, there is no benefit in shipping a 4000-pixel file unless your workflow specifically needs it. Resize first or during export when appropriate.
Not all transparent images are equally forgiving. Check edges, shadows, semi-transparent regions, and anti-aliased borders after conversion.
If AVIF cuts file size dramatically with no visible downside, it is a strong candidate. If the difference is small or quality suffers in noticeable ways, another format may be better.
Quick workflow tip: Keep the original PNG as your backup, publish the AVIF as your optimized delivery version, and test the result on real devices.
Many landing pages use transparent PNG cutouts layered over gradients or photos. These are often heavy. AVIF can reduce payload while keeping the layered design effect intact.
Tutorial sites often publish many PNG screenshots. Converting them can reduce total article weight significantly, especially in long-form content.
If a social-preview-style visual or embedded blog graphic was exported as PNG out of habit, AVIF may be a lighter publishing format.
Some illustration sets and icon assets work very well in AVIF, especially when delivered as web graphics rather than editable design resources.
This is one of the most useful comparisons because many site owners already know WebP. Both AVIF and WebP are modern web formats, and both can be better than PNG for delivery. The difference is that AVIF often pushes compression further.
| Question | PNG to WebP | PNG to AVIF |
|---|---|---|
| Compatibility | Very broad modern support | Strong modern support, but slightly more workflow-sensitive |
| Compression potential | Good | Often better |
| Transparency | Yes | Yes |
| Best for | Safe modern upgrade path | Maximum size reduction focus |
If you want a practical middle step, convert PNG to WebP can be a strong option. If you want to push image weight lower and your environment supports it, AVIF is worth testing.
An asset used in a design file, internal workflow, and public website may need multiple versions. Do not replace your original blindly.
Format conversion helps, but oversized dimensions can still waste bandwidth. Compression is only one part of optimization.
Text-heavy screenshots, logos, transparent cutouts, and colorful graphics behave differently. Review important assets individually.
If users download the file, upload it elsewhere, or open it in older tools, PNG may still be easier for them to use.
PNG to AVIF is rarely an isolated decision. It usually sits inside a larger image strategy.
For example:
If you are refining your image library, these related tools can help:
This workflow is especially useful for:
If your site relies on lots of PNGs, AVIF deserves a place in your optimization toolkit.
For web delivery, often yes. AVIF usually offers much smaller file sizes and still supports transparency. For source files, editing, and maximum compatibility, PNG can still be better.
Yes. That is one of the main reasons it is considered a strong modern alternative to PNG for many web graphics.
It can if settings are too aggressive or if the image contains delicate text and edge detail. But with sensible conversion settings, many images remain visually strong while becoming much smaller.
No. Keep the original as your master file. Use the AVIF as the delivery version for web or publishing workflows.
It can be, especially for web display with transparency. Still, logos should be reviewed carefully because sharp edges and brand-critical detail matter.
Both can reduce file size and preserve transparency. AVIF often compresses more efficiently, while WebP may feel simpler in some workflows due to broader familiarity and support.
Converting PNG to AVIF is one of the most practical ways to modernize heavy image assets without giving up transparency. It is especially valuable for websites that rely on screenshots, graphics, overlays, and exported design elements that are currently weighing down pages.
The key is to treat conversion as a publishing decision, not a one-size-fits-all replacement strategy. Keep PNG where it makes sense. Use AVIF where size savings and modern delivery matter most. Test your important assets, compare results at real display size, and build a workflow that matches how the images are actually used.
Use PixConverter to simplify your image workflow and prepare lighter files for publishing, sharing, and better performance.
Helpful next steps:
