CSV to JSON

Convert numbers to Chinese RMB uppercase or plain Chinese digits

Convert JSON arrays to CSV with auto field extraction

Convert Markdown to HTML with source and rendered preview views

Convert between camelCase, PascalCase, snake_case, kebab-case naming styles

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