RegexCraft vs Retest

RegexCraft is a desktop workbench for testing, replacing, comparing, debugging, and generating regular expressions. It supports .NET, PCRE2, and JavaScript with full fidelity; other listed flavors have High or Approximate fidelity. Match mode highlights matches and capture groups, while Replace mode previews substitutions and supports backreferences. Compare mode puts results from two to four flavors side by side, showing validity, matches, groups, fidelity, and known differences. Its educational step-through walkthrough covers the .NET engine using F10 and F11. A GREP tool searches and replaces across folders with include and exclude globs, cancellation, dry-run, and backups. It can generate code snippets for languages including C#, JavaScript, Python, Go, and Swift. Library, history, and settings stay in the operating system's application-data folder; the core product has no account system or cloud sync. Personal use is free. Commercial, organizational, government, or revenue-generating use requires a $49.00 USD one-time Business license.

Retest is a free, open-source terminal utility for developing and checking regular expressions on Linux. A subject string can be supplied as an argument or piped through standard input, so it can fit into shell workflows. Retest finds all non-crossing matches and highlights nested capture groups in colors distinct from the whole match. An optional formatted list shows match order and string indexes. Release 0.2.2 added a flag for reading the subject from a file. The project provides Linux release binaries, including a 64-bit Debian installer listed for release 0.2.2. Its README describes compiling from source with Cargo and installing through a Makefile. The source code and documentation are licensed under Apache License 2.0. The project presents Retest as a terminal-based alternative to regex101, for developers building and checking patterns. No paid plans or usage limits are listed.