Image Compressor

Upload your photo, adjust quality, shrink the file size.

This tool requires JavaScript to run the actual compression in your browser. Please enable JavaScript to use it.

Image Compressor

Upload a JPG, PNG, or WEBP photo, adjust quality, shrink the file size in seconds. Free, no sign-up, your photo never leaves your browser.

How it works

Upload your photo. JPG, PNG, or WEBP — drag & drop or click.
Adjust the quality and format. See a live before/after comparison.
Download the smaller file. See exactly how much smaller it got.

Why Stelluna

Free — no sign-up needed
Runs in Your Browser — your photo never leaves your device
Fast — results in seconds

Frequently Asked Questions

Is it free?
Yes, no account needed.

Does my photo get uploaded anywhere?
No, compression runs entirely in your browser.

Which formats are supported?
JPG, PNG, and WEBP, up to 20MB.

Do I need to sign up?
No.

How much should I lower the quality?
As you adjust the quality slider you see a live before/after comparison — for most photos, 70-80% quality gives a noticeable size reduction with no visible loss.