URL Pattern Tester
Match URL components and inspect named URLPattern groups without fetching URLs.
Loading tool…
How to use URL Pattern Tester
Match URL components and inspect named URLPattern groups without fetching URLs. Absolute HTTP(S) patterns can use named path segments and wildcards. The result includes per-component groups for each supplied URL.
- Provide the input and select the documented mode or options.
- Run the tool and review its result and any limits reported below.
- Copy the text result or download a separate output file.
Good to know
- Custom regex groups containing parentheses are rejected. Pattern500 characters;100 URLs of1,000 characters; embedded credentials rejected.
- URLPattern polyfill semantics apply. Worker startup10s and execution1s; URLs are never requested.
- Processing happens in this browser tab. Inputs and results are not automatically saved or uploaded.
Common questions
What does URL Pattern Tester process?
Absolute HTTP(S) patterns can use named path segments and wildcards. The result includes per-component groups for each supplied URL.
What happens to my original input?
The tool creates a separate result. Selected files and pasted data remain on this device; inspect the result before using it in another system.
Keep going with related tools
All developer →URL Parser
Inspect HTTP(S) URL components, normalized hostnames, and repeated query parameters without visiting a link.
SEOExact-path Redirect Mapping Workbench
Audit a literal old-path mapping for chains and cycles and author a narrow Apache RedirectMatch configuration.
DeveloperJSON Formatter
Format and indent valid JSON in your browser, with downloadable output and clear syntax errors.
DeveloperJSON Viewer
Inspect a JSON document as a safe path, type, and value tree without executing its contents.
DeveloperJSON Validator
Check JSON syntax locally and see its root type, value count, and nesting depth.
DeveloperJSON to CSV
Convert a JSON array of objects into a quoted CSV table with spreadsheet formula protection.