Paste source text
Use logs, copied pages, documents, source code, or exports.
Pattern extraction tool
Regular Expression Extractor
Use a regular expression to pull custom identifiers, dates, codes, tags, and other structured fragments that fixed-purpose extractors cannot cover.
No upload Free to use Works on mobile
Extract tool
Regex Extractor
Options
Regex matches
0 resultsHow to use Regex Extractor
Enter a pattern and flags
Test a JavaScript-compatible expression and select a capture group when needed.
Copy the match list
Optionally deduplicate matches while preserving their first appearance.
Common uses
Log analysis
Extract request IDs, error codes, and timestamps.
Data migration
Pull identifiers from legacy text fields.
Content processing
Extract custom tags, references, and structured values.
Regex Extractor FAQ
Is Regex Extractor free to use? +
Yes. Regex Extractor is free to use without an account or usage meter.
Is my data uploaded or stored? +
No. The processing for this tool runs locally in your browser. Entered content is not sent to our server.
Which regular expression syntax is supported? +
Patterns use the JavaScript RegExp engine and common flags such as g, i, m, s, and u.
Keep working
Related list tools
Clean
Filter Lines
Filter lines online by text, prefix, suffix, exact value, or regular expression. Keep matching lines or remove them while preserving the original order.
Extract
Email Extractor
Extract email addresses from text, documents, logs, HTML, or copied data. Validate, lowercase, deduplicate, and export a clean email list locally.
Extract
URL Extractor
Extract HTTP, HTTPS, and www links from text online. Remove duplicates, strip tracking query parameters, and copy a clean URL list privately.
Extract
Number Extractor
Extract integers, decimals, signed numbers, or all numeric values from text online. Remove duplicates, preserve order, and export one number per line.