ConvertPort

Convert PNG to AVIFFree Online Converter

Convert up to five PNG images to AVIF in your browser. No file uploads or account needed.

Select images


JPG, PNG, WebP, HEIC, AVIF, TIFF, GIF, or SVG — always converts to AVIF. Up to 10MB per image. Max 5 images.

    Add your PNG images to convert them to AVIF right in your browser.

    How it works

    The output is preset to AVIF. Each PNG file can be up to 10 MB.

    1. Choose files

      Drop your PNG images into the box or choose them from your device.

    2. Convert

      Convert — the output format is already set to AVIF, so just click the convert button.

    3. Download

      Download each AVIF image individually, or choose Download all as ZIP when at least two files are ready.

    About PNG images

    PNG (Portable Network Graphics) uses lossless compression and supports transparency with an alpha channel. It is the preferred format for logos, icons, screenshots, and graphics where sharp edges and transparent backgrounds are essential.

    About AVIF images

    AVIF (AV1 Image File Format) is a modern image format that delivers excellent compression and quality. It is ideal for web photos when you need smaller files than JPEG or WebP with broad browser support.

    PNG — source format guide

    What is PNG?

    PNG is a lossless raster image format that preserves every pixel exactly as encoded. It supports up to 16 bits per channel, an alpha transparency channel, and is ideal for graphics, screenshots, and images where sharp edges and transparent backgrounds matter.

    When was PNG invented?

    PNG was created in 1996 as a patent-free replacement for GIF, developed by an Internet Engineering Task Force working group. It was designed to support lossless compression, full-color images, and an alpha channel for transparency.

    What is PNG used for?

    • Logos, icons, and UI elements with transparent backgrounds
    • Screenshots and technical diagrams
    • Images requiring pixel-perfect reproduction
    • Game assets and digital illustrations
    • Charts, infographics, and images with text overlays

    Best practices for PNG

    • Use PNG-8 for simple graphics with few colors to reduce file size; use PNG-24 or PNG-32 when you need full color or alpha transparency.
    • Run PNG files through optimization tools (e.g., pngcrush, optipng) to reduce file size without quality loss.
    • Avoid PNG for large photographs — JPG or WebP will produce significantly smaller files.
    • Use indexed color mode when your image has a limited palette of 256 colors or fewer.
    • Export at the exact dimensions needed; scaling down large PNGs in the browser wastes bandwidth.

    AVIF — output format guide

    What is AVIF?

    AVIF is a modern raster image format based on the AV1 codec. It typically delivers smaller files than JPEG or WebP at similar visual quality, supports HDR, wide color gamuts, and transparency, and is supported in all major browsers.

    When was AVIF invented?

    AVIF was finalized in 2019 as part of the AV1 video codec ecosystem developed by the Alliance for Open Media. It brings AV1 compression to still images and is increasingly adopted for modern web delivery.

    What is AVIF used for?

    • High-efficiency web images and responsive picture elements
    • Photography where bandwidth and storage matter
    • Replacing large JPEG or PNG assets on performance-focused sites
    • Next-generation image delivery alongside WebP fallbacks

    Best practices for AVIF

    • Use AVIF for web photos when you can provide JPG or PNG fallbacks for older clients.
    • Keep quality between 50–80 for photos; very high settings rarely justify the extra bytes.
    • Test output on target browsers before replacing all site assets with AVIF.
    • Prefer AVIF over JPEG when optimizing Core Web Vitals and Largest Contentful Paint.

    When to choose AVIF over PNG

    Converting PNG to AVIF is useful when you need to optimize images for a specific platform or use case. Whether you are preparing photos for a website, reducing file sizes for faster loading, or switching to a format with different features like transparency or better compression, ConvertPort handles the conversion instantly while preserving as much quality as possible.

    Best practices for converting PNG to AVIF

    Follow these guidelines to get the best results when converting PNG images to AVIF:

    • Start with the highest quality PNG source file available — converting a low-quality image cannot restore lost detail.
    • Choose AVIF when it fits your use case: JPG for photos and small file sizes, PNG for transparency and sharp graphics, WebP for modern web optimization.
    • Resize images to the dimensions you actually need before or during conversion to avoid unnecessarily large output files.
    • Review the converted AVIF file at full size before publishing or sharing to confirm quality meets your expectations.

    Benefits of using ConvertPort

    Convert up to five images per batch on your device. When several files are ready, you can download them as a single ZIP.

    Your images stay on your device

    Your browser opens, processes, and prepares your images for download.

    How local processing works

    • Image files are read from your device.
    • Conversion happens in your browser.
    • Converted files are available to download from the current tab.
    • No account is required.
    • You choose where to save the results.
    • Your original files stay as they are.

    Saving your files

    Download the converted images before closing the tab. ConvertPort does not keep a copy for you to retrieve later.

    Image privacy FAQ

    Does ConvertPort upload my photos?

    No. Image processing takes place on your device.

    Does converting replace the original?

    No. The download is a separate file.

    Can I share a download link for the result?

    Save the file to your device first, then share the file through the app of your choice.

    Frequently asked questions

    Is PNG to AVIF conversion free?

    Yes, converting PNG to AVIF with ConvertPort is free. There are no hidden fees, watermarks, or required accounts. You can convert up to five images per batch, with files up to 10 MB each.

    Will converting PNG to AVIF reduce image quality?

    Quality depends on the formats involved. Converting from a lossless format like PNG to a lossy format like JPG may reduce quality slightly. ConvertPort uses high-quality conversion settings to minimize any visible loss. For the best results, start with the highest quality source image available.

    How long does PNG to AVIF conversion take?

    Most PNG to AVIF conversions complete within a few seconds. Larger files up to the 10 MB limit may take slightly longer. You can convert up to five images in a single batch.

    What is the maximum size for PNG files?

    Each PNG file can be up to 10 MB. Convert up to five images per batch.

    Do I need to install software to convert PNG to AVIF?

    No. Choose your PNG files in your browser, convert them to AVIF and save the results. You can use the tool without installing anything or creating an account.

    Are my PNG images kept private during conversion?

    Yes. Your PNG images and converted files stay on your device. ConvertPort processes the files in your browser.