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An industrial-strength regex utility for logs, datasets, and PII masking. Process thousands of lines instantly, entirely in your browser.
In an era of cloud-everything, the Batch Regex Tool takes a different approach. We believe that your sensitive data—customer logs, email lists, and PII—should never leave your device. By processing regex operations entirely in the browser's memory, we provide a secure, air-gapped environment for data sanitization.
Our tool comes pre-loaded with patterns for the most common data engineering tasks:
Unlike standard regex editors, Batch Regex allows you to chain presets. Selecting multiple patterns applies them sequentially, allowing for complex multi-stage transformations—like extracting emails from a raw HTML dump and then normalizing them to lowercase in one click.
Because there is no network overhead, operations are limited only by your local CPU and RAM. You can comfortably process up to 100,000 lines of text with instant feedback. For enterprise users, the Pro version adds bulk file processing, allowing you to drag-and-drop hundreds of files for offline batch cleaning.
No. We don't have a server. Everything happens in your browser's RAM. Once you close the tab, the data is gone forever.
We use the standard JavaScript Regex (ECMAScript) engine, which supports advanced features like lookaheads, lookbehinds, and named capture groups.
Yes. Pro users can save an unlimited number of custom regex patterns to their browser's local storage for reuse across sessions.