IllumeAI

Free Online Image Converter

Convert between PNG, JPG, WebP and AVIF — batch and instant.

Convert images between modern formats with native browser encoders. Output WebP or AVIF for smaller files, or JPG for maximum compatibility. Runs entirely on your device.

Open the free Image Converter

100% in-browser · nothing leaves your device

How the converter works

  1. Step 1

    Drop your images

    Drag in JPG, PNG, WebP, or AVIF files (single or batch).

  2. Step 2

    Pick a format

    Choose your target format and quality.

  3. Step 3

    Download

    Grab the converted files — one image or a ZIP of the batch.

Why use this tool

All modern formats

PNG, JPG, WebP, and AVIF (where browser support exists).

Batch conversion

Convert dozens of files at once and download as a ZIP.

Quality control

Tune compression for lossy formats; lossless for PNG.

Browser-native

Uses your browser's built-in encoders — fast and private.

Frequently asked questions

Does AVIF work in every browser?
AVIF encoding is supported in recent Chrome, Edge and Firefox. Safari support is partial. The tool detects this and disables AVIF if your browser can't encode it.
Should I use WebP or AVIF?
AVIF is typically 20-30% smaller than WebP at the same quality, but slower to encode. For ecommerce, WebP is the safer compatibility choice today.
What about transparency?
PNG, WebP, and AVIF preserve transparency. When converting to JPG the tool fills transparent pixels with white.

Related free tools

Free Online Image ResizerFree Online Image CropperFree Online Image CompressorFree EXIF / Metadata Remover
Open the free Image Converter