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MondayKit

Compress PNG

Make PNG files smaller in your browser with colour quantisation – nothing is uploaded.

Processed in your browser. Files are never uploaded.

or drop files here, or paste

How to compress PNG

  1. Add one or more PNG files.

  2. Keep Quality mode and move the slider, or switch to Target size (KB).

  3. Optionally set a maximum width or height.

  4. Click Compress and compare before and after, then download.

  • No upload

    Your files are processed on your device and never sent anywhere.

  • Free, no signup

    No account, no watermark and no daily limit.

  • Fast

    No upload or download wait – results appear in seconds.

Smaller PNGs, privately

Big PNG screenshots and graphics slow down websites and bounce off upload limits. This page uses the same engine as the image compressor: for PNG files it reduces the number of colours with the UPNG encoder, keeping transparency, and can also resize the image. All of it runs in your browser – services like TinyPNG upload your files, MondayKit does not.

What to expect

Image type Typical result Better option if too large
Screenshot, UI, chart Large saving with no visible change Lower the max width
Logo or icon with transparency Good saving, transparency kept Convert to WebP
Photo saved as PNG Small saving PNG to JPG or WebP

Results depend on the image; the before/after preview and the size on each result show exactly what you got.

Tips

  • Set a maximum width (for example 1600 px) for screenshots from high-resolution screens.
  • WebP keeps transparency and is usually the smallest, if the place you upload to accepts it.
  • For a strict KB limit, see Compress image to 100 KB or 50 KB.

Frequently asked questions

How does PNG compression work here?

PNGs are reduced by quantising colours (merging similar ones) with the UPNG encoder inside the browser-image-compression library, and optionally by resizing. Transparency is kept.

Is PNG compression lossless?

Not fully. Lowering the colour count is a small, usually invisible loss. Screenshots and logos shrink a lot; photos saved as PNG shrink less.

Why is my PNG barely smaller?

Photos with millions of colours do not quantise well. Tick Convert to WebP, or use PNG to JPG if you do not need transparency.

Are my images uploaded?

No. Compression runs in your browser and the files stay on your device.

Can I hit an exact size in KB?

Switch to Target size and enter the KB. If it cannot get there, it shows the closest size and suggests a smaller width.

Related tools

Resize imageChange image dimensions in pixels, percent or social presets.Image converterConvert between JPG, PNG and WebP (and read GIF/BMP).Crop imageCrop images freely or to 1:1, 4:3, 16:9 and more.Exam photo & signature resizerResize photos and signatures to SSC, UPSC, IBPS, NEET and JEE specs.JPG to PDFTurn JPG, PNG or WebP images into a PDF document.

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