123024.com
Text Processing
Free browser-based developer tools across encoding, formatting, crypto, generators, reference, and text utilities. Runs locally — nothing is uploaded.
- Regex Tester — Test regular expressions in real-time with match highlighting, capture group inspection, and replacement preview. Built-in preset library and token-level explanation.
- Text Diff — Compare two texts with line and word-level precision. Side-by-side or inline view with collapsible unchanged regions.
- Word / Character Counter — Count words, characters, sentences, and paragraphs; estimate reading and speaking time; analyze keyword density. Runs entirely in your browser.
- Markdown Preview — Write and preview Markdown with GFM, syntax highlighting, Mermaid diagrams, and PDF/PNG export. Runs entirely in your browser.
- cURL → Code — cURL → Code — runs entirely in your browser; nothing is uploaded.