CSV to JSON

Number to Chinese RMB (yuan/jiao/fen) or plain Chinese digits

Convert JSON arrays to CSV with auto field extraction

Markdown to HTML with source and preview views

Convert between camelCase, PascalCase, snake_case, kebab-case etc.

Convert between fullwidth and halfwidth characters

Validate, pretty-print or minify JSON with error line:col reporting

Merge multiple PDF files in sequence, all processed locally in browser

Generate cryptographically secure passwords with custom length and charset