Pinyin Tone Mark Converter

Enter Pinyin (numbers like ni3 hao3, or marks like nǐ hǎo — type v for ü) Result

---

Try an example:

Mandarin Chinese has four main tones plus a neutral tone. In numbered Pinyin the tone is written as a digit after the syllable; in standard Pinyin it is written as a diacritic over a vowel.

Want to train your ear to hear these? Try the free Tone Trainer Quiz or browse every syllable with audio on the Interactive Pinyin Chart.

This converter follows the official Hanyu Pinyin placement rules, applied in order:

1. If the syllable has an a or an e, mark it. A syllable never contains both. Examples: hǎo, xiě, tiān, huáng.
2. In ou, mark the o. Examples: dōu, zhòu, gǒu.
3. Otherwise, mark the last vowel. Examples: guì, liù, xǔ, nǚ, shuǐ → shuǐ (mark on i).

Typing tip: since ü is not on most keyboards, write v in numbered Pinyin — nv3 becomes nǚ and lv4 becomes lǜ, exactly as Chinese input methods do. Full details are in our Pinyin Spelling Rules guide.

How do I convert ni3 hao3 to nǐ hǎo?

Type the Pinyin with tone numbers into the box above and click Numbers → Tone Marks. The tool places the correct diacritic on the correct vowel of each syllable, producing nǐ hǎo instantly.

How do I type ü in numbered Pinyin?

Type v — the same convention as Chinese input methods. Both nv3 and nü3 convert to nǚ.

What does tone number 5 mean?

Tone 5 (or 0) is the neutral tone — short, light, and unstressed, written with no mark. Example: nǐ hǎo ma (你好吗).

Can I convert tone marks back to numbers?

Yes — paste Pinyin with diacritics and click Tone Marks → Numbers. Numbered Pinyin (ni3 hao3) is the standard format in dictionaries like CC-CEDICT and in flashcard decks such as Anki.

Is my text sent to a server?

No. Conversion happens entirely in your browser with JavaScript — it is instant, private, and works even for long passages.