Compress an image without sending it anywhere

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JPG, PNG, WebP, GIF · no limit on size or number

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How it works

The tool opens each image, redraws it and saves it again with stronger compression. The original format is kept by default: a JPG comes out as a JPG, a PNG as a PNG. Nothing is sent anywhere; all the work happens on your phoneyour tabletyour computer.

A PNG is rewritten as tightly as possible: a palette when the image has few colors, grayscale when it’s gray, no transparency layer when nothing is transparent. In Light, that’s fully lossless. In Balanced and Maximum, the tool also tries to bring the image down to 256 colors at most, like online PNG compressors do, and only keeps that result if the measured similarity stays above 97% (95% in Maximum).

If the result turns out heavier than the original, the tool gives you back your original file and tells you so.

It then tries WebP and tells you the real gain if it’s worth it. That’s very often the case for a photo saved as PNG: PNG can take almost nothing off it, while WebP sometimes takes off 90%.

How much size you save

A photo straight from a camera or a phone often loses half its weight at the Balanced level, with no visible difference on screen. A screenshot in PNG often loses three quarters of its weight in Balanced. An image that’s already optimized will gain much less.

The real lever is still the number of pixels. A 4000-pixel-wide photo brought down to 1920 loses three quarters of its size, and nobody will see the difference on a screen or in an email. That’s what the maximum width setting is for.

Frequently asked questions

Are my images sent anywhere? No. You can check for yourself in thirty seconds: here is how.

Is transparency kept? Yes, in PNG and WebP. JPG can’t store it: transparent areas turn white, and the tool warns you when that happens.

Is EXIF data kept? No. The date taken, camera model and GPS location disappear from the compressed file. That’s a loss for archiving and a gain for privacy.

Can I process several images at once? Yes, as many as you like. The result downloads image by image or all together in a zip archive.

What about the HEIC photos from my iPhone? Browsers can’t open them on their own. Run them through HEIC to JPG first, which converts them without sending anything either.