How do I optimize WebP files?

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

Is WebP optimization lossless?

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

What tools does optimo use for WebP?

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

Optimize WebP for the web

Modern image format with great compression and broad browser support.

Last updated: 2026-03-18

To optimize WebP images, run npx optimo image.webp. Optimo applies format-specific ImageMagick-powered compression that typically reduces WebP 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.webp

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

When to use WebP

web images
thumbnails
mixed photo + graphics

Trade-offs

Not universally supported by legacy tooling

Related formats

PNG

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

JPEG

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

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

More for WebP

Compress WebP Resize WebP What is WebP?

Compare formats

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

PNG vs WebP

Frequently asked questions

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