Converts Chinese characters to Hanyu Pinyin, the official romanization system. Choose tone marks (nǐ hǎo), tone numbers (ni3 hao3), plain letters without tones, syllable initials, or just first letters. Covers over 20,000 common characters.
Pinyin data is loaded once from an authoritative open-source dataset and everything runs locally in your browser — your text is never uploaded. For characters with multiple readings (polyphones), the most common reading is used.