RegexLab Tester

High-Speed PCRE Regex Analyzer & Catastrophic Backtracking Detector

High-performance regular expression diagnostic and optimization studio. Compiles and tests complex PCRE, ECMAScript, and POSIX regular expressions, detecting catastrophic exponential backtracking vulnerabilities and visualizing finite state automatons.

Purchase License ($19.99) Open Live Web Portal

Real Desktop Application Screens • Captured from the Running Program

100% Native Executable Node-Lock Verified

Head-to-Head Competitor Analysis

Why RegexLab Tester is cheaper, faster, and more secure than RegexBuddy ($39.95) / RegExr (Cloud with privacy leak risk).

Comparison Metric	RegexLab Tester	RegexBuddy ($39.95) / RegExr (Cloud with privacy leak risk)
License Model & Price	$19.99 (One-Time Perpetual)	$39.95 single-seat or cloud web tools
Annual Financial Savings	Save $20+ every single year
Competitor Drawbacks	Outdated Windows-only software from 2012, or web tools that leak sensitive customer data and regexes over the web
Why Vivian Is Better	One-time $19.99 perpetual license, 100% offline privacy, built-in ReDoS catastrophic backtracking detector
Execution Environment	100% Offline Air-Gapped	Mandatory cloud check-in
Runtime Telemetry	Zero Telemetry (0.00KB sent)	Cloud telemetry & user tracking

Engineering Specifications & Features

Multi-flavor regex engine support: PCRE2, ECMAScript, Python re, and POSIX Extended

Automated catastrophic backtracking detector flagging ReDoS (Regular Expression Denial of Service) risks

Graphical NFA/DFA finite state automaton syntax visualizer rendering state transition nodes

Sub-microsecond benchmark measuring execution step count, match time, and memory consumption

Interactive substitution and string replacement workbench with capture group variables ($1, $2)

Code snippet exporter generating optimized regex code for C++, Python, Rust, Go, and JavaScript

Graphical Interface (GUI) Architecture

Clean dark IDE layout featuring pattern input box with real-time match highlighting, group extraction table, and ReDoS vulnerability safety meter.

Headless CLI Reference & Execution

RegexLab Tester includes a headless command-line binary ready for automation pipelines, cron daemons, and CI/CD runners:

# Headless command execution:
regexlab --test-sample --pattern '([a-z]+)+$' --input test.txt --detect-redos
# Cryptographic node-lock activation:
regexlab --activate YOUR-CROCKFORD-KEY

Core Architecture & Asymmetric Security

Native C++ wrapper over PCRE2 with custom step-counting hooks preventing system freezes on pathological regex patterns.