Regex Extractor

Extract text patterns using regular expressions. Choose from presets or write your own regex. View capture groups in a table and download matches as CSV.

About Regex Extractor

Extract patterns from any text using regular expressions. Use built-in presets for common data types or write custom regex with capture groups. View results organized in a table and download as CSV for further analysis. All processing happens in your browser — your data never leaves your device.

Preset Patterns

Quick-select presets for emails, URLs, phone numbers, IP addresses, and dates. No regex knowledge needed for common tasks.

Capture Groups

Use regex capture groups to extract structured data. Each group becomes a column in the results table for easy analysis.

Table Preview

See all matches organized in a clean table with row numbers. Validate your pattern visually before downloading.

Private & Secure

All text processing runs locally in your browser. No data uploaded to any server. Works offline and with files of any size.

📋 Common Use Cases

Pre-Analysis Data Prep

Clean CSV and spreadsheet data before analysis. Standardize formats, remove duplicates, and fix inconsistent values that would skew results.

PII Redaction

Remove or mask personally identifiable information before sharing datasets with third parties or publishing open data. Comply with privacy regulations.

Text File Parsing

Convert unstructured text files into organized columns. Extract structured data from logs, reports, or exported text dumps.

Database Cleanup

Prepare data for database import by fixing malformed records, standardizing field formats, and removing invalid characters.

🪜 How to Use This Tool

  1. Load your data
    Paste raw text or upload a file. The tool auto-detects delimiters and structure in CSV, TSV, and fixed-width formats.
  2. Choose cleaning operations
    Select what to do — remove duplicates, trim whitespace, anonymize PII, split columns, or standardize formats.
  3. Preview changes
    Review a before/after comparison of your data. Adjust cleaning rules if needed before applying to the full dataset.
  4. Download cleaned data
    Export as CSV, JSON, or copy to clipboard. Original data is never uploaded — all cleaning happens locally.

📚 Related Guides

Frequently Asked Questions

Is this data tool free?
Yes. All data tools are completely free. No signup needed.
Is my data sent to a server?
No. All data processing happens in your browser. Your JSON, CSV, SQL, and text data never leaves your device.
Can these handle large files?
JSON formatter and CSV tools comfortably handle files up to ~10MB in browser. Performance depends on your device for larger datasets.