Tiny Online Tools
Extract, Split, and Transform Text with Regex
When you need to extract specific data from unstructured text—log entries, CSV files, HTML, JSON responses, or raw text—regex is your tool. But writing and testing regex in code is slow. This Regex Extractor lets you develop and test regex patterns directly in your browser, then use the results immediately or copy them for your codebase.
No server, no coding environment setup needed. Just paste text, write your pattern, and see the extracted matches instantly.
Three Powerful Extraction Modes
Extract Matches: Pull out all strings matching your pattern. Useful for finding email addresses in a text dump, extracting URLs from HTML, pulling numbers from logs, or harvesting specific data formats. See all matches in a clean list.
Split by Pattern: Use a regex to split text into chunks. Instead of splitting on a literal delimiter, split on any pattern—whitespace variations, punctuation sequences, or specific text markers. This is powerful for parsing non-standard delimited data.
Replace Matched Content: Transform text by replacing matches with new content. Use capture groups to reorganize matched data, remove unwanted parts, or apply consistent formatting across a string.
Why This Beats Manual Processing
Without a tool, extracting data from large text blocks means:
- Writing a script in your language of choice
- Testing the regex until it's right
- Running it on your data
- Getting results you can't easily verify
With this extractor:
- Type the pattern and see results immediately
- Adjust and re-test in seconds
- Copy results when they're perfect
- Work entirely in your browser
Common Use Cases
Log Analysis: Extract error messages, timestamps, or IP addresses from log files. Test your extraction pattern against sample log lines before processing entire logs.
Data Cleaning: Pull email addresses, phone numbers, or URLs from messy text sources. Transform and normalize data before importing to databases or spreadsheets.
Content Harvesting: Extract specific data from HTML, JSON, or other structured but bulky formats without writing a full parser.
Configuration Parsing: Pull specific settings from config files or environment dumps.
Bulk Text Transformations: Rename variables, reformat lines, or reorganize structured text data using regex splitting and replacement.
Quick Data Validation: Before feeding data to your application, extract and verify it matches expected patterns.
Full Regex Support with Flags
Use all standard JavaScript regex flags:
- g (global): All matches, not just the first
- i (case-insensitive): Ignore uppercase/lowercase differences
- m (multiline): Treat line boundaries as match anchors
- s (dotAll): Dot metacharacter matches newlines
When replacing, use $1, $2 syntax to reference capture groups, making it easy to reorganize extracted data.
Local Processing, Zero Privacy Concerns
All extraction happens in your browser. Your data never leaves your machine, so you can process sensitive logs, customer information, or proprietary content without hesitation.