Free Online Image Converter
Convert between JPG, PNG, WebP, AVIF, HEIC, and more instantly. Batch processing, instant download — free, no sign-up.
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Frequently Asked Questions
What image formats can I convert?
LeanImg supports conversion between JPG, PNG, WebP, AVIF, HEIC, SVG, TIFF, BMP, GIF, ICO, and PDF. You can convert in any direction — for example, PNG to JPG, HEIC to WebP, or JPG to AVIF. All conversions happen instantly in your browser.
Is it free to convert images?
Yes, completely free with no limits. There is no sign-up, no watermark, and no file count restriction. You can convert as many images as you need. The tool runs in your browser so there are no server costs to pass on to users.
Is it safe to convert images online?
Yes. LeanImg processes images entirely in your browser. Your files are never uploaded to any server, never stored anywhere, and never accessible to anyone else. It is as private as editing images on your own computer. Close the tab and all data is gone.
Can I convert multiple images at once?
Yes. Drop up to 10 images at a time and they will all be converted automatically. Once done, download them individually or all at once as a ZIP file. Batch conversion runs locally in your browser with no upload required.
What is the best image format for websites?
WebP and AVIF offer the best compression for web use. WebP is broadly supported and 25–35% smaller than JPG. AVIF is even more efficient at about 50% smaller. For maximum compatibility, JPG and PNG remain universal. Choose based on your browser support needs.