GiantPage is the reference site for testing HTML parsers at scale. Real-world file corpus, side-by-side performance comparisons, and the largest open demo pages available anywhere.
A single HTML page pushing the boundaries of what's parseable — deeply nested DOM, thousands of elements, malformed markup handled gracefully.
Downloadable test files ranging from 100KB to 50MB. Real web pages, not synthetic markup. Covers edge cases your parser will hit in production.
Run htmlparser2, Cheerio, jsdom, and BeautifulSoup against the same file. See memory usage, parse time, and error behavior side by side.
Curated collection of broken HTML that breaks parsers. Mismatched tags, unclosed elements, namespace quirks, special characters. Every parser fails somewhere.
No hand-crafted test cases. Every file comes from actual web pages — messy, inconsistent, and representative of what parsers actually deal with.
Benchmark parsers across JavaScript, Python, and C. Compare the same file across the entire parser ecosystem, not just one language.
Every benchmark run is timestamped and reproducible. Track parser performance across versions and catch regressions before they hit your users.
Download any test file. Use it in your CI. Fork the corpus. GiantPage is a community resource, not a walled garden — the benchmark belongs to developers.
Every parser has a breaking point. Find yours before your users do.
GiantPage is the benchmark that didn't exist until now. Built for developers who ship parser-dependent tooling and need to know exactly how their code handles the worst HTML on the internet.