SVG validation

xmllint (part of libxml2)

sudo apt install libxml2-utils

xmllint --noout yourfile.svg

prints nothing and sets exit code to 0 on success

print error message and sets exit code to non-0 on failure

Check XML validity, but not specific to SVG.

One could use the SVG DTD.

SVG-specific linting beyond just XML structure. Requires node.js

npm install -g svglint

svglint yourfile.svg

Checking if an SVG file follows the SVG spec more closely.

Install:

pip install svgcheck

Usage:

svgcheck yourfile.svg

The W3C Markup Validator can be run locally via Docker for comprehensive validation.

docker run -v $(pwd):/var/www:ro validator/validator /var/www/yourfile.svg