Is Compress Image free to use?

Yes. Compress Image is free with generous limits — no account required.

Are my photos private?

Yes. Compression happens entirely in your browser with the canvas API. Your image never leaves your device and is never uploaded to a server.

Is the size estimate accurate?

It isn't an estimate at all — the tool actually encodes your image at the current settings and shows the real output size, so the number you see is exactly what you download.

What happens to PNG transparency?

JPEG can't store transparency, so transparent areas are filled with white when you choose JPEG output. Choose WebP to keep transparency while still compressing.

Image tools

Compress Image

Reduce image file size with a quality slider — and see the real output size before you download.

100% free
Private — in your browser
No sign-up

Compress Image reduces the file size of JPG, PNG, and WebP photos with a quality slider that shows the real output size before you download. It's the fast way to shrink a photo for email, web pages, or upload limits without a visible drop in quality. Everything is processed in your browser, so images never leave your device. Pair it with Resize Image to change dimensions or Convert Image to switch formats.

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How to compress image

1
Drop in the PNG, JPEG, or WebP image you want to shrink.
2
Pick JPEG or WebP output and drag the quality slider.
3
Watch the real output size and savings update as you adjust.
4
Download your compressed image.

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Guides & tutorials

Step-by-step help that uses Compress Image.

All guides

How to Convert HEIC to JPG on Windows, Android & Online (Free) 5 min read