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Overview
Nokogiri reads and writes HTML4, HTML5, and XML from Ruby and queries elements with CSS selectors or XPath. Its APIs cover DOM and SAX parsing, XSD validation, and XSLT transformation.
Features and best fit
Based on official documentation; not hands-on tested · Content checked:
Key features
Best fit
Embed extraction, transformation, and validation in Ruby
It fits jobs that extract selected elements from pages, ingest XML APIs or feeds, and validate document formats. Parsing local HTML and XML strings demonstrates the core APIs without network access.
Sources: [5]
Before adoption
Test the actual Ruby and native-parser combination
Version 1.19.4 requires Ruby 3.2 or later or JRuby 10 or later, and the underlying parsers differ between CRuby and JRuby. The HTML5 API is unavailable on JRuby. The project deliberately surfaces meaningful parser differences, so validation should match the production implementation and platform.
Sources: [1]
Official sources
- [1]sparklemotion/nokogiri README (1.19.4)(2026-10-04)
- [2]sparklemotion/nokogiri GitHub repository metadata(2026-10-04)
- [3]sparklemotion/nokogiri license (1.19.4)(2026-10-04)
- [4]Nokogiri 1.19.4 release(2026-10-04)
- [5]Nokogiri official documentation(2026-10-04)
Supplemental curator note
Its uses extend beyond screen scraping to XML integrations, feed processing, and document validation. Treat input as untrusted and test with the same Ruby implementation, native gem, and underlying parser combination used in production.
Try it in 3 steps
- 1
Check CRuby and Bundler, then add the fixed version
Require CRuby 3.2 or later for the HTML5 API, verify Bundler, and install v1.19.4 in an isolated bundle.
ruby -e 'abort "CRuby 3.2+ required for HTML5" unless RUBY_ENGINE=="ruby" && Gem::Version.new(RUBY_VERSION)>=Gem::Version.new("3.2")' && bundle --version && mkdir nokogiri-local && cd nokogiri-local && bundle init && bundle add nokogiri --version 1.19.4 - 2
Create a local HTML and XML check
Parse an in-memory HTML5 document with a CSS selector and XML with XPath.
printf '%s\n' 'require "nokogiri"' 'html = Nokogiri::HTML5("<main><h1>OSS探訪</h1></main>")' 'xml = Nokogiri::XML("<items><item id=\"1\">local</item></items>") { |config| config.strict }' 'puts [html.at_css("h1").text, xml.at_xpath("//item[@id=\"1\"]").text].join(" | ")' > parse.rb - 3
Verify the parsed values
Confirm that OSS探訪 | local is printed from the two documents.
bundle exec ruby parse.rb
Growth
Growth trends · Last 30 days
6,284 Stars
Trend data is still being collected.
Development activity
Last 90 days · weekly
- Commits (last 30 days)
- 7
- Open PRs
- 44
Development activity is still being collected.
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Categories and tags
Categories
GitHub data
GitHub dataView detailed GitHub data
GitHub Topics
- ruby
- nokogiri
- xml
- sax
- ruby-gem
- xslt
- xerces
- libxml2
- libxslt
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