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Svg Minifier - Free Online Tool

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Last updated March 22, 2026

SVG Minification vs Optimization

SVG minification focuses on reducing file size by removing whitespace, comments, and shortening attribute values. SVG optimization goes further — it restructures the SVG, merges paths, converts shapes to paths, and removes semantically redundant elements. Both are often combined in tools like SVGO.

Minification Techniques

Technique	Example Before	After
Remove whitespace	`<rect x="10" y="10"/>`	`<rect x="10" y="10"/>`
Shorten numbers	`10.000000`	`10`
Remove comments	`<!-- layer 1 -->`	(removed)
Shorten colors	`#ffffff`	`#fff`
Remove xmlns	`xmlns:xlink="..."`	(if unused)
Collapse groups	`<g><g>...</g></g>`	`<g>...</g>`

Minifying with SVGO CLI

Bash

# Install SVGO
npm install -g svgo

# Minify a single file
svgo input.svg -o output.min.svg

# Minify all SVGs in a directory
svgo -f ./icons -o ./icons-min

# Show size reduction stats
svgo input.svg --pretty --show-plugins

Gzip Compression

SVG files compress extremely well with gzip because they are text-based XML. A 100KB SVG might compress to 15–20KB with gzip. Serve SVGs with Content-Encoding: gzip from your web server for maximum performance. The compressed format is called SVGZ (SVG + gzip) and uses the .svgz extension.

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