How to Use SVG in Ruby on Rails
Render SVG icons and graphics in Rails applications using the asset pipeline and inline helper methods.
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Asset Pipeline and Image Tags
Rails' asset pipeline (Sprockets or Propshaft) handles SVG files placed in app/assets/images, referenced with the standard image_tag helper for simple, non-styled SVG usage.
- Place SVGs in app/assets/images and use image_tag helper
- Sprockets/Propshaft fingerprint SVGs for cache-busting in production
- Use image_tag for SVGs that don't need CSS path styling
Inlining SVG for CSS Styling
For SVGs needing CSS control over colors, create a helper method that reads the raw SVG file and returns it as raw HTML, or use a gem like inline_svg for cleaner syntax and caching.
- Use the inline_svg gem for clean, cached inline SVG rendering
- Inline SVG allows CSS targeting of individual fill/stroke values
- Cache inlined SVG output to avoid repeated file reads
Frequently Asked Questions
What's the easiest way to inline SVG in Rails?
The inline_svg gem provides a simple view helper that reads and caches SVG files, rendering them inline so CSS can style individual elements.
Does Rails fingerprint SVG asset filenames?
Yes — Sprockets or Propshaft fingerprint SVGs like other assets for cache-busting, so always reference them through asset helpers rather than hardcoded paths.
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