RegexPilot vs RegexRegex

RegexPilot is a Mac-native visual regular-expression builder with AI for composing, inspecting and testing patterns. Users assemble expressions from categorized drag-and-drop blocks, inspect them in a panel and follow a plain-English breakdown tree linked to the pattern. Sample text shows highlighted matches and capture groups, and replacements can be assembled from blocks. The product supports 21 regex flavors and routes patterns to the corresponding language engines. Users can provide API keys for listed AI providers or run AI offline with LM Studio, Ollama, llama.cpp or LocalAI. Its library includes 50 curated patterns and supports folders, tags and JSON import/export. A VS Code extension synchronizes changes between the app and regex literals in the editor. Users can export code for 21 languages, create SVG or PNG railroad diagrams and make browser-openable share links. The desktop app says it sends no usage statistics, telemetry or analytics to a server on its own; patterns and settings remain on-device unless a share link is created. It requires macOS 14 or newer. The free plan covers JavaScript and TypeScript engines; the one-time license costs 19.00 EUR.

RegexRegex is a free browser-based tool for building and testing regular expressions. Its checker runs JavaScript patterns in the browser and shows matches, captures, explanations, and errors, with previews for replacement text. A guided builder composes basic JavaScript patterns using controls for character types, quantities, groups, boundaries, and flags. It can test the pattern it creates, but does not cover every syntax feature or convert arbitrary patterns into an equivalent visual layout. Python, PHP, Java, .NET, and Perl engines can be used by explicitly pressing Run, which sends checks to an online execution service. Replacement previews recognize numbered and named captures such as $1 and $. The searchable reference covers 25 syntax and flag items. Users can save up to 50 test cases in the browser, each with input up to 20,000 characters. Share links include the selected pattern, engine, flags, and operation; test and replacement text are omitted unless users opt in. A cached JavaScript checker may work offline, while checks using other engines need the online service.