MoaTools
한국어

Image Compressor

Resize, compress, and convert images to JPG, PNG, or WebP.

Reviewed: 2026-07-21

Private, on-device utility

Image optimizer

Resize and compress JPG, PNG, and WebP images locally in your browser.

Method and assumptions

Resize and compress a photo, then convert it to JPG, PNG, or WebP. Processing happens entirely in the current browser and the selected image is not uploaded to our server. Transparent areas are filled with white when exporting to JPG.

How to use it

  1. Choose a JPG, PNG, or WebP image.
  2. Adjust width, quality, and output format.
  3. Check the converted file size and preview, then download the result.

When it helps

  • Improving website image load time
  • Reducing a photo before attaching it to email
  • Converting a large PNG photo to WebP

How to verify the result

Check input units and reference dates first. For an important decision, compare the result with an official source or original document. A rounded display can differ slightly from the underlying value.

Frequently asked questions

Is my image uploaded to a server?

No. File reading, resizing, and conversion all happen inside your browser.

Which format produces the smallest file?

WebP or JPG is often smaller for photos. PNG can be better for transparency and crisp graphics.

What happens when I lower quality?

The file gets smaller, but fine detail may blur and compression artifacts may appear. Check the preview before downloading.

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