Convert PNG to AVIF with Transparency Intact
Upload a PNG and get back an AVIF file that keeps the alpha channel and the exact pixel dimensions. One thing to know up front: AVIF here is written at a single fixed quality setting, so it is a lossy re-encode of your lossless PNG, not a byte-for-byte repack.
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Why Convert PNG to AVIF
PNG stores pixels losslessly, which is exactly what you want while you are editing a logo, a UI export or a screenshot, and exactly what you do not want when the same file has to travel over a network. A flat PNG export of a hero image or a product shot with a transparent background routinely runs into the megabytes. AVIF, which packs still images into the AV1 intra-frame coding used by video, reaches a similar visual result in a fraction of the bytes and still carries a full alpha channel, so cutouts and rounded corners survive the trip.
On MiConvert, PNG sources are read by sharp (libvips) and handed to its AVIF encoder at a fixed quality of 80. There is no quality slider, no bit-depth picker and no resize step on this page: the image is auto-oriented, converted to sRGB if it carries a wide-gamut profile such as Adobe RGB, and written out at the same width and height as the source. Everything happens in worker processes on our servers, not in your browser.
What survives: the alpha channel, the pixel dimensions and the orientation. What does not: the strict losslessness of PNG, since quality 80 is a lossy setting, and the embedded metadata, because no EXIF or ICC profile is written into the AVIF output on this path. If your PNG is an APNG, only the first frame is converted; animation is not carried into AVIF here. Very wide or very tall images can also hit the pixel ceiling of roughly 268 megapixels and come back with an error instead of a file.
The people who ask for this conversion are usually shipping images to a website: a developer swapping PNG assets for AVIF behind a picture element, someone chasing a Largest Contentful Paint score, or a designer handing off icons and illustrations that need to stay transparent.
How to Convert PNG to AVIF
- Check the PNG first. If it is an APNG, export the frame you actually want, because only the first frame is converted. If the image needs to be smaller on screen, resize it before converting, since this page writes AVIF at the source pixel size.
- Drop the PNG onto the upload area, or pick several at once. A single request takes up to 10 files without an account or on a free account, 25 on Plus and 50 on Pro, with a per-file cap of 50 MB for guests, 100 MB on a free account, 200 MB on Plus and 1 GB on Pro.
- Start the conversion. The file is uploaded over HTTPS, queued, and re-encoded by sharp's AVIF encoder at quality 80 with the alpha plane preserved.
- Wait for the job to finish. For PNG sources of a couple of megabytes, most conversions complete within a few seconds of the upload landing.
- Download each AVIF from the results list. There is no zip-all button, so multi-file batches are downloaded one file at a time.
- Compare the AVIF against the original PNG in a browser before you ship it. If a flat graphic shows banding or soft edges at this quality setting, keep the PNG for that specific asset.
What This Converter Does
- Keeps the PNG alpha channel in the AVIF output, including partial transparency and anti-aliased edges
- Writes AVIF through sharp's AV1 encoder at a fixed quality of 80, the same setting on every file so results are predictable across a batch
- Auto-orients the image and converts wide-gamut input (such as Adobe RGB) to sRGB, so the AVIF displays consistently in browsers; expect a small colour shift on saturated wide-gamut source files
- Takes palette PNGs, 8-bit and 16-bit PNGs, and transparent PNGs without any pre-conversion step on your side
- Accepts several PNGs per request, up to 10 files for guests and free accounts and up to 50 on Pro, each returned as its own AVIF
- No sign-up required for files up to 50 MB
Video Tutorial
Watch this step-by-step tutorial to learn how to convert PNG files to AVIF format online for free using MiConvert.com. No software installation required.
PNG to AVIF: Common Questions
Does the transparent background survive the conversion?
Yes. PNG is read by sharp, and AVIF output on that path keeps the alpha channel, so transparent and semi-transparent pixels carry over. This is one of the targets where PNG transparency is safe without extra steps (WebP and JXL also keep the alpha channel); converting the same PNG to JPG or TIFF here would matte it onto a solid colour or drop it entirely.
Is the AVIF lossless like the original PNG?
No. The encoder runs at quality 80, which is a lossy setting, and there is no lossless AVIF option on this page. For most photographs and shaded illustrations the difference is hard to see at 100%, but flat graphics with hard edges, thin text or large gradients are where lossy artifacts show up first. If you need pixel-exact output, keep the PNG.
Can I choose the quality or the output size?
Not on this page. There is no quality slider, no DPI field and no resize control for PNG to AVIF; the file is written at the fixed setting and at the source pixel dimensions. If the image is larger than it needs to be, run it through our resize-image tool first (it takes one PNG at a time and never enlarges), then convert the smaller PNG to AVIF.
Can I batch convert a folder of PNGs?
You can send a batch in one request, but not an unlimited one: 10 files for guests and free accounts, 25 on Plus, 50 on Pro, within the per-file size cap. Each PNG comes back as a separate AVIF and is downloaded individually, since there is no download-all archive.
My PNG is animated (APNG). Will the animation be kept?
No. APNG input is decoded to its first frame and that single frame becomes the AVIF. If you need motion on the web, convert a GIF or animated WebP to WebP instead, where frames, delays and looping are preserved.
Will EXIF, copyright or color profile data be kept?
No. On this path no EXIF and no ICC profile is written into the AVIF, and wide-gamut input is converted to sRGB during the encode. Treat the AVIF as a delivery copy and keep the PNG as the archival master if the metadata matters to you.
Which browsers can display the AVIF I get back?
Current versions of Chrome, Edge, Firefox and Safari all decode AVIF natively. Older browsers and some older email clients and image tools still do not, which is why AVIF is usually served inside a picture element with a WebP or PNG fallback rather than as the only copy of an asset.
What happens to my file after the conversion?
The PNG you upload is deleted as soon as the job finishes. The AVIF stays on our download server behind a random, unguessable link for about four hours and is then deleted automatically. Conversion runs on our servers, not in your browser, and file names, sizes and outcomes are logged for operations and troubleshooting.