Case コンバーター

Count characters, words, lines, paragraphs & UTF-8 bytes

Convert text to bold, italic, script, gothic, circled and other fancy Unicode fonts

Live Markdown preview supporting headings, lists, code blocks, and quotes

Remove duplicate lines with options for case, blank lines, and order

Diff two text blocks line by line, red for removed, green for added

Line operations: sort, reverse, number, shuffle, deduplicate, extract columns

Extract all email addresses from text with auto-deduplication

Extract Chinese mobile numbers from text, supports +86 prefix