How do I optimize PNG files?

Run "npx optimo image.png" in your terminal. Optimo applies format-specific ImageMagick-powered compression that reduces PNG file size while preserving quality. The original file is kept if the optimized output is not smaller.

Is PNG optimization lossless?

By default, optimo uses lossless optimization for PNG. For additional compression, add the --lossy flag to allow minor quality trade-offs for significantly smaller files.

What tools does optimo use for PNG?

Optimo uses ImageMagick, MozJPEG, and SVGO (depending on format) under the hood with format-specific settings tuned for PNG files.

Optimize PNG for the web

Lossless image format with sharp edges and great support for transparency.

Last updated: 2026-03-18

To optimize PNG images, run npx optimo image.png. Optimo applies format-specific ImageMagick-powered compression that typically reduces PNG file size by 15–40% without visible quality loss. The original file is kept if the output is not smaller.

Command

Start here. Run optimo on a image file:

npx optimo image.png

Tip: add --dry-run to preview changes.

When to use PNG

UI assets
logos
icons
graphics with transparency

Trade-offs

Larger files than modern formats
Not ideal for photos

Related formats

JPEG

The classic photo format: widely supported, good quality-to-size for photographs.

WebP

Modern image format with great compression and broad browser support.

AVIF

High-compression modern image format that can beat WebP on size at similar quality.

HEIC

A common camera output format (especially Apple devices) with efficient compression.

JPEG XL

Next-gen image format designed for high quality and efficient compression.

GIF

Legacy animated image format that is still widely used for simple loops.

SVG

Vector format: crisp at any size and excellent for icons and illustrations.

Related conversions

Convert PNG to WebP Convert PNG to AVIF Convert PNG to JPEG Convert PNG to JPEG XL Convert PNG to HEIC Convert PNG to GIF Convert JPEG to PNG Convert WebP to PNG

More for PNG

Compress PNG Resize PNG What is PNG?

Compare formats

If you're picking a delivery format, comparisons can help.

PNG vs JPEG

Frequently asked questions

How do I optimize PNG files?: Run "npx optimo image.png" in your terminal. Optimo applies format-specific ImageMagick-powered compression that reduces PNG file size while preserving quality. The original file is kept if the optimized output is not smaller.
Is PNG optimization lossless?: By default, optimo uses lossless optimization for PNG. For additional compression, add the --lossy flag to allow minor quality trade-offs for significantly smaller files.
What tools does optimo use for PNG?: Optimo uses ImageMagick, MozJPEG, and SVGO (depending on format) under the hood with format-specific settings tuned for PNG files.