imgresizer.org

Compress PNG

Reduce PNG file size by scaling dimensions and stripping EXIF metadata. PNG is lossless - pixel quality is fully preserved.

Your image is processed locally. Nothing is uploaded.

How to use Compress PNG

  1. 1

    Upload your PNG

    Drop a PNG file onto the tool or click to select it from your device.

  2. 2

    Scale down dimensions (optional)

    Use the scale slider to reduce image dimensions - halving dimensions reduces file size by ~75%.

  3. 3

    EXIF metadata is stripped automatically

    Processing your image automatically removes all embedded metadata.

  4. 4

    Download the smaller PNG

    Click the download button. Your browser saves the output locally - no server upload.

Why PNG compression works differently

PNG is a lossless format - it stores every pixel exactly. Unlike JPG, there is no quality knob that discards data to save space. PNG compression works entirely by finding more efficient ways to encode the same pixel data. The result is always pixel-identical to the original. This is why "compress PNG" is fundamentally different from "compress JPG" - you are optimising the encoding, not sacrificing quality.

The most impactful way to make a PNG smaller is to reduce its dimensions. Halving the width and height of an image reduces pixel count by 75%, which translates directly into a much smaller file. If your PNG is 2400x1600 and you only ever display it at 800x533, scaling it down costs nothing visible and saves enormous space.

Metadata removal

PNGs can carry embedded metadata: colour profiles (ICC data), creation software tags, timestamps, and comments. These chunks add no visual information but can add 10-100 KB to a file. The canvas redraw approach used here strips all of this automatically, producing a clean file with only the pixel data and standard colour information. This is especially useful for PNGs exported from design tools like Figma or Photoshop, which embed substantial metadata by default.

When to switch to WebP instead

If you need aggressive size reduction beyond what dimension scaling offers, converting to WebP is often the right call. WebP in lossless mode produces files 26% smaller than PNG on average. WebP in lossy mode at 85% quality can be 5-10x smaller than a PNG for photographic content. If transparency support is required and file size is critical - for example, UI images delivered over mobile networks - WebP is worth considering.

Frequently Asked Questions

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