Compress PNG Free Online. Reduce File Size Without Losing Quality

Apply lossless PNG optimization and review the measured output size before download. This browser-based PNG compressor uses smart lossless optimization: your images stay pixel-perfect while output-size changes depend on the source image. Free, private, supported local media processing required.

How to Compress a PNG File (3 Steps)

Upload your PNG: Select one or more PNG files from your device.
Compression runs in your browser: The tool applies lossless PNG optimization locally, stripping unnecessary metadata and re-encoding the file for maximum efficiency.
Download the compressed PNG: Save your smaller PNG file. Compare the result with the original before downloading.

Why Compress PNG Images?

Most PNG files contain extra metadata, inefficient compression, and color profile data that adds bytes without improving visual quality. Compressing PNG files:

Speeds up website loading. Smaller images mean faster page loads and better Core Web Vitals scores
Reduces storage costs for apps and cloud services
Makes image uploads faster on slow connections
Stays within file size limits on platforms like WordPress, Shopify, or email

When to Use PNG vs JPG Compression

PNG compression is lossless. It never degrades your image. Choose PNG when you need:

Logos and icons with sharp edges, thin lines, or text
Screenshots where pixel accuracy matters
Images with transparent backgrounds (PNG supports alpha channel; JPG does not)
Graphics with flat color areas that compress extremely well

For photographs, JPG usually achieves smaller files. Use our Image Compressor to handle JPG, PNG, and WebP in one place.

Frequently Asked Questions

How much can PNG files be compressed?: Typically 40–80% depending on image content. Logos and screenshots with large solid-color areas compress the most.
Does compressing a PNG reduce quality?: No. PNG uses lossless compression. File size is reduced by removing metadata and optimizing encoding. Pixel data is never degraded.
Is this PNG compressor free?: Core use is currently available without signup or payment; tool-specific limits may apply.
Do my PNG files get uploaded to a server?: No. Compression runs entirely in your browser using WebAssembly. Supported image contents are not uploaded for processing.
What is the difference between PNG and JPG compression?: JPG uses lossy compression which permanently removes some image data for smaller files. PNG uses lossless compression which preserves all pixel data: ideal for logos, screenshots, and graphics with text.

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