Compare two blocks of text line by line, optionally ignoring whitespace

Compare two JSON documents structurally, by key path

Test regex matches live and inspect every capture group

Convert identifiers between camelCase, snake_case, kebab-case, and more

Count words, characters, lines, and estimated reading time

Count AI tokens and estimate what a call will cost

Remove duplicate lines, optionally ignoring case and whitespace

Sort lines of text, with natural and random ordering

Escape strings for a specific target language

Generate URL slugs, with optional Chinese-to-pinyin conversion

Build a table of contents from Markdown headings

Compare locale files to find missing and empty keys

Convert Chinese to pinyin, with word-aware heteronym handling