Text Tools
Text cleanup, comparison and transformation tools: sort, dedupe, number, reverse and diff lines and documents online.
Text Compare
Compare two texts line by line online for free. See added and removed lines highlighted instantly — a fast, private diff tool.
Diff & Patch Generator
Create unified diff patches online — compare two texts into a .patch file with configurable context, or apply a patch back (even reverse). GNU patch compatible format.
Regex Tester
Test regular expressions online with live match highlighting, capture group details and full JavaScript flag support. Free regex debugger and playground.
Markdown Preview
Write and preview Markdown online for free. Live GitHub-flavoured rendering with tables and code blocks, sanitized HTML output — all in your browser.
HTML Preview
Free online HTML viewer and editor — paste HTML and see a live rendered preview in a sandboxed iframe, side by side with your markup.
SQL Formatter
Format and beautify SQL online for free. Dialect support for MySQL/MariaDB, PostgreSQL, SQLite and T-SQL, keyword casing and indentation options.
Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, UPPER, Title and more — online for free, all variants shown at once.
Text Line Tools
Sort, dedupe, reverse, shuffle, trim and number text lines online for free. Chainable line operations with live line counts — all local.
Word Counter
Free online word counter — count words, characters, sentences and paragraphs, estimate reading time and see your most frequent words. No upload.
Token Counter
Count LLM tokens online — GPT-4o, o3, GPT-4 and Claude encodings with context-window usage and API cost estimate. Runs locally, no upload.
JavaScript Minifier
Minify JavaScript online with Terser — remove whitespace and comments, mangle variable names and compress code. Shows byte savings.
CSS Minifier
Minify CSS online with csso — strip whitespace and comments, merge duplicate rules and shorthand properties. Shows byte savings, all local.