Image Compression

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Drop your image here JPG, PNG, WebP · or click to choose The file is never uploaded — all processing happens on your device

Original Result

— → — Ready

How to compress photos online

The tool reduces the file size of a photo or image: you choose the format and quality and instantly see how large the result is and how it compares with the original. It comes in handy when a photo exceeds an upload limit, slows down a website, or needs to be sent quickly. Compression happens in your browser, and the file isn't uploaded anywhere.

How to use it

Click "Open image", drag a file into the window, or paste an image from the clipboard (Ctrl+V).

Choose a format: WebP, JPEG or PNG.

For WebP and JPEG, move the quality slider (from 1 to 100).

If needed, turn on "Resize" and set the width and height.

Compare "Original" and "Result" with the slider, check the savings, and click "Download".

Settings and tips

WebP usually produces the smallest file at the same quality and keeps transparency. All modern browsers and most social networks support it.

JPEG is the most widely compatible format for photos. Transparent areas are filled with white.

PNG saves the image losslessly. It suits screenshots and graphics with transparency, but the file size often doesn't go down.

For websites and messaging apps, a quality of 70–85 is usually enough: the difference is barely visible to the eye.

Reducing the dimensions cuts file size the most. 1920 px on the long side is enough for a post. The "Keep aspect ratio" checkbox keeps the image from stretching.

Limitations

The maximum is 40 megapixels for both input and output.

It opens any format your browser supports: JPG, PNG, WebP and usually AVIF. For GIFs, only the first frame is used — compress animations in the GIF studio.

EXIF data (camera, date, geotag) is not carried over to the compressed file.

If a PNG comes out larger than the original, you'll see a "+" in the percentage — choose WebP instead.

Enlarging an image won't add detail; there's a separate tool for that.

Privacy

The image never leaves your device: your browser encodes it itself using Canvas. The site collects visit statistics: Cloudflare Web Analytics without cookies, while Yandex Metrica and Google Analytics load only if you've accepted cookies. Learn more in our privacy policy.

Photo compression FAQ

Can I compress a photo without losing quality?

Only PNG is lossless, but it rarely gets smaller. In practice, WebP or JPEG at quality 75–85 shrinks the file several times over, and the difference is barely visible — check it with the comparison slider.

How do I compress a photo to 1 MB or 200 KB?

Lower the quality and watch the file size under the "Download" button. If that's not enough, turn on "Resize" and reduce the width.

Do I need a subscription?

For the first hour you can use it without signing up or subscribing — the hour counts from the first time you open any of the locked mozgi.io tools. After that you need a subscription: it gives full access to all locked tools, prompts and skills. There are no watermarks.