Regex Tester & Debugger

Test regular expressions in real-time with syntax highlight matching, group captures, flags, replace mode, and ready-made patterns.

Common Regex Presets

Regular Expression Pattern

0 matches

//gi

Flags:

Test String Input

Live Highlight Preview

Welcome to Skill-Forge! Contact us at support@skillforge.dev or dev@example.org for help.

Match Inspector (0)

No matches found in the current input text.

Regex Token Quick Reference

.Any character except newline

\d / \DDigit / Non-digit

\w / \WWord char / Non-word char

+ / * / ?1+, 0+, 0 or 1 repeats

^ / $Start / End of string

(...)Capture group

Terminal CLI cheat sheet — grep & sed

Regexes on the command line: grep patterns, sed substitutions, and the pipelines built on them.

Interactive Git graph & CLI sandbox

Master Git branching, rebases, merges, cherry-picks, detached HEAD, and stashes with a live reactive DAG graph and interactive terminal.

Typing test for developers

Practice everyday typing, code symbols, terminal commands, and long-form developer text. Tracks WPM, accuracy, streak, and consistency score.

Live markdown preview

Split-pane markdown editor with real-time preview. Perfect for writing README files, documentation, and blog posts with export to HTML.

Visual gradient generator

Build linear, radial, and conic CSS gradients visually. Add stops, adjust angles, and copy ready-to-use CSS or Tailwind classes.

Mermaid diagram editor & previewer

Interactive Mermaid diagram editor with live SVG rendering, theme selection, presets, zoom/pan canvas, and export to SVG, PNG, and .mmd.

Generate & Read QR Codes

Create custom QR codes for URLs, Wi-Fi, Contacts, and Text with color & logo options, or upload/scan QR codes to decode content instantly.