pattern

Regex Explainer — Deconstruct regular expressions. Analyze quantifiers, capture groups, sets, boundaries, and flags with clear explanations.

Generate pure CSS background patterns — stripes, dots, grids, checkerboards, and more. Copy-ready CSS code, no images required.

Generate seamless SVG background patterns: polka dots, stripes, chevron, hexagons, waves, and more. Customize colors and spacing. Download SVG or CSS.

Free online SQL regex tester. Test REGEXP patterns across MySQL, PostgreSQL, SQLite, and MSSQL dialects. See matches and differences instantly.

Free online regex visualizer. Create visual diagrams and flowcharts of regular expression patterns. Understand complex regex at a glance.

Free online regex batch tester. Test regular expressions against multiple strings simultaneously. See matches, groups, and highlights.

Free online string to regex generator. Generate regular expression patterns from example strings. Detect common patterns automatically.

Free visual regex builder. Compose regular expressions from categorized tokens, test live with highlighting, and get plain-English explanations.