Image tool

Image to AVIF Converter

Convert PNG, JPG, or WebP images to modern AVIF format for smaller file sizes. Free, private.

IMG AVIF
PrivConvert
Privacy-first conversion
No files stored
In-memory processing
Deleted instantly
No sign-up needed

Complete the security check to begin

Why use AVIF?

AVIF is a next-gen image format that offers up to 50% better compression than JPEG and 20% better than WebP, while maintaining excellent visual quality.

  • Smallest file sizes - dramatically smaller than JPG, PNG, and even WebP
  • Great quality - excellent visual quality at low file sizes
  • Growing support - supported in Chrome, Firefox, Safari, and Edge

How to Convert IMG to AVIF Online

Converting IMG to AVIF with PrivConvert takes three quick steps and no software to install. Your file is processed privately in memory and deleted the instant the AVIF is ready.

1
Upload your IMG file

Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.

2
Automatic conversion

Once uploaded, the conversion from IMG to AVIF starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.

3
Download your AVIF file

Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.

What makes this IMG-to-AVIF converter different

Privacy here is not a checkbox. Every IMG-to-AVIF conversion is engineered so your data never lingers, leaks or gets reused.

Encrypted transfers

Every upload and download is protected with TLS 1.3, so your image cannot be intercepted on the way to the server or back to you.

No account required

Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.

Works on any device

Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.

Fast in-memory processing

Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.

IMG vs AVIF - Format Comparison

FeatureIMGAVIF
File extension.img.avif
Supported by PrivConvertYes (as input)Yes (as output)
Privacy-safe conversionIn-memory, zero storage
Max file size250 MB per file
Batch supportUp to 20 files simultaneously

Built for people who value their privacy

From one-off files to daily batches, thousands of people rely on PrivConvert precisely because it keeps nothing once the job is done.

250 MB Max file size
450+ Conversion tools
0 sec File retention
100% Free to use

Frequently Asked Questions

How much smaller are AVIF files?
AVIF images are typically 50% smaller than JPEG and 20% smaller than WebP at equivalent visual quality.
Do all browsers support AVIF?
Chrome, Firefox, Safari, and Edge all support AVIF. Some older browser versions and desktop apps may not.
What is the best quality setting for AVIF?
A quality of 50-65 gives an excellent balance of file size and visual quality. AVIF is very efficient even at lower quality settings.
Does AVIF support transparency?
Yes, AVIF supports full alpha transparency, making it a great replacement for both PNG and JPG.
Is this tool really free?
Yes, completely free with no hidden fees, no watermarks, and no sign-up required. You can convert as many files as you need.
Are my files private and secure?
Absolutely. Every conversion runs in an isolated, in-memory process. Your files never touch the disk, are never stored or shared, and are deleted from memory the moment your download is ready.

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Further Reading

Image Formats Compared: JPEG, PNG, WebP, AVIF, and More Why Every Website Should Use WebP Images in 2026