Compress PNG

ConvertICO Optimizer offers a free online tool that can shrink your PNG images by up to 70% while keeping full transparency intact. The compressed images remain compatible with all modern web browsers, ensuring seamless integration into your projects.

Drop your PNG files here or click to select them Max 20 files, 5MB per file

Higher quality preserves more details but results in larger file sizes. Lower quality gives smaller files but may introduce visible artifacts.

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PNG Compression Quality Settings

The quality setting affects the compression level of the PNG image:

  • 90-100%: Maximum quality, minimal compression, larger file size but virtually identical to original
  • 75-89%: Standard quality, good compression, smaller files with barely noticeable quality loss
  • 60-74%: Low quality, maximum compression, smallest files but may show visible artifacts

Differences Between High Quality Settings

  • 100%: Practically lossless compression, preserves almost all original data, ideal for professional work
  • 95%: Very high quality with minimal compression artifacts, good balance for detailed images
  • 90%: High quality with slightly more compression, still excellent for most web purposes

Important Notes

  • PNG compression is lossless at the structure level but can reduce color information
  • Higher quality settings preserve more color detail but result in larger files
  • For web graphics and UI elements, 80-85% usually provides the best balance
  • For photographs with lots of detail, consider using 90% or higher

How to Compress PNG Files

To compress a PNG file from your computer, drag and drop up to 20 PNG files or click to select them manually.

Adjust the quality slider to balance between file size and image quality, then our tool will compress your images accordingly.

Download your optimized PNG files with up to 70% reduced file size. For multiple files, you can download all compressed images as a single ZIP archive.

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FAQ - PNG Compression

What does this PNG Compressor do? +

This PNG Compressor is an online tool that reduces the file size of PNG images while preserving transparency and quality. It helps make your websites load faster and reduces storage space.

Will compression affect image quality? +

Our compression tool uses a smart algorithm that significantly reduces file size while maintaining visual quality. You can adjust the quality slider to find the perfect balance between file size and image quality for your needs.

Why should I compress PNG files? +

Compressed PNG files load faster on websites, use less bandwidth, take up less storage space, and improve your site's SEO rankings by enhancing page speed.

How do I use the quality slider? +

The quality slider lets you control the compression level. Higher values (80-100%) maintain better visual quality but result in larger files. Lower values (60-75%) produce smaller files but may introduce some visual artifacts. We recommend starting with the default setting of 80% and adjusting as needed.

Can I download all my compressed files at once? +

Yes! When you compress multiple PNG files, you'll see an option to download all compressed images as a single ZIP archive, making it convenient to save multiple optimized files.

Is there a limit to how many files I can compress? +

Yes, you can compress up to 20 PNG files at once, with a maximum size of 5MB per file.

Is my data secure? +

Yes. We don't store your images permanently. They are automatically deleted after 24 hours, and we never access or view your content.