Image Format Converter

Upload your photo, download it as JPG, PNG, WEBP, or AVIF — HEIC files supported too. Free, no sign-up, runs entirely in your browser.

How it works

  1. Upload your photo. JPG, PNG, WEBP, HEIC, AVIF, or GIF.
  2. Choose your target format. JPG, PNG, WEBP, or AVIF.
  3. Download the converted file. Full quality, in seconds.

Why Stelluna

Frequently Asked Questions

Is it free?
Yes, no account needed.

Does my photo get uploaded anywhere?
No, conversion — including HEIC — runs entirely in your browser.

Which formats are supported?
Output: JPG, PNG, WEBP, AVIF. HEIC and GIF are also accepted as input, up to 25MB.

Do I need to sign up?
No.

Does AVIF work in every browser?
It works in most modern browsers (Chrome, Edge, Firefox); if it's not supported you'll be asked to pick a different target format.