Chinese Pinyin Annotator
Add Pinyin to Chinese text in your browser, review polyphonic readings, then choose how tones and syllable boundaries appear before export.Chinese characters do not spell out their pronunciation. Hanyu Pinyin supplies a Roman-letter reading, and tone is part of that reading: mā, má, mǎ, and mà represent different syllables. Pinyin is useful beside beginner texts, vocabulary lists, names, captions, and pronunciation notes, but it does not translate the Chinese or explain what a word means.
Context matters because many Han characters are polyphonic. The character 行 can be read xíng in one word and háng in another. A dictionary can choose a likely reading from surrounding characters, yet personal names, place names, specialist vocabulary, and unusual phrasing still need a reader who knows the intended meaning.
- Tone marks
- The most readable pronunciation form, with the tone shown on the vowel, such as nǐ hǎo.
- Tone numbers
- A plain-text form that puts 1 to 4 after the four lexical tones and 0 after a neutral-tone syllable, such as ni3 hao3.
- No tones
- Letters without tone information, such as ni hao. This is easier to type but less precise.
Spacing also carries meaning. Standard Pinyin orthography groups syllables into words rather than treating every character as an isolated unit. Automatic annotation cannot always recover those word boundaries, so spaces, hyphens, or compact output should be chosen for the destination and reviewed before publication.
A reliable handoff keeps the Chinese source beside the Pinyin. That makes it possible to check an uncertain reading, repair a name, and notice when punctuation or non-Chinese text changes the intended phrase.
How to Use This Tool:
Start with the complete Chinese phrase so nearby characters can help resolve pronunciation.
- Paste up to 10,000 characters into Chinese source text. The text must contain at least one Han character; punctuation and non-Chinese characters remain in place.
- Choose Tone display. Keep tone marks for normal reading, use tone numbers for plain-text systems, or remove tones only when the destination does not need pronunciation precision.
- Review every entry under Readings to review. Select the intended pronunciation for polyphonic characters, especially in names, places, and specialist terms.
- Open Advanced only when the handoff needs hyphens or compact syllables. Changing Syllable separator keeps the selected readings unchanged.
- Check Reading coverage and the Reading ledger before copying the annotated text. Any Review or Unresolved entry deserves attention.
Interpreting Results:
Resolved means the local dictionary returned one reading for that character in context. Review means more than one reading is available, even though one has been selected. Unresolved means no usable dictionary reading was found and the original character remains in the Pinyin line.
The coverage counts measure dictionary handling, not linguistic correctness. A phrase with every character marked Resolved can still contain the wrong reading for a person’s name or a domain-specific term. Compare the Pinyin with the original phrase and ask a knowledgeable speaker when the wording matters.
- Keep tone marks when the text will teach or check pronunciation.
- Treat no-tone output as a spelling aid, not a complete pronunciation guide.
- Do not read the number of reviewed characters as a quality score for the Chinese text.
Technical Details:
Annotation works character by character after a context-sensitive dictionary pass. Han characters receive a selected reading and a list of alternatives; other characters are preserved in their original positions. The same selected syllables can then be rendered with tone marks, numeric tones, or no tones.
Transformation Core:
The transformation keeps pronunciation choice separate from notation. This is why changing tone style or the separator does not silently choose a different reading.
| Stage | Rule | Audit cue |
|---|---|---|
| Character scan | Each Unicode Han character enters the reading pass; other text stays in source order. | The Chinese line should be unchanged. |
| Context reading | The pinned local dictionary selects its likely reading from the phrase. | The selected reading appears first. |
| Alternative review | Distinct dictionary readings are collected for each Han character. | More than one candidate produces Review. |
| Manual choice | A chosen alternative replaces the default for that character. | The ledger records the selected Pinyin. |
| Notation | The chosen syllables are rendered with tone marks, numbers, or no tones and joined with spaces, hyphens, or no separator. | Reading choices and coverage counts stay fixed. |
Status assignment follows an ordered rule. A missing dictionary reading is Unresolved. Otherwise, more than one distinct candidate is Review; one usable candidate is Resolved. Punctuation and non-Han characters are Preserved rather than counted as readings.
| Option | Example | Information effect |
|---|---|---|
| Tone marks | nǐ hǎo | Keeps tone in the standard diacritic form. |
| Tone numbers | ni3 hao3 | Keeps tone as a numeric suffix. |
| No tones | ni hao | Removes tone information and is not fully reversible. |
| Hyphens | nǐ-hǎo | Changes only the join between adjacent Han-character readings. |
| Compact | nǐhǎo | Removes the visible syllable boundary. |
The same source text, notation settings, and manual reading choices produce the same annotation. Comparisons between versions are meaningful only when those three inputs remain fixed.
Accuracy Notes:
The conversion uses a version-pinned dictionary in the browser and does not send the pasted text to a server. Dictionary segmentation is useful for ordinary phrases but is not authoritative for personal names, dialect readings, rare characters, newly coined terms, or specialist vocabulary.
- Manual choices apply to the current character position, so review repeated characters separately.
- Removing tones or syllable separators discards distinctions that cannot be recovered from the final Pinyin alone.
- Use a language specialist or an authoritative name source when pronunciation has legal, educational, or publishing consequences.
References:
- GB/T 16159-2012, Basic rules of Chinese phonetic alphabet orthography, Standardization Administration of China, 2012.
- Pinyin conversion and tone-format documentation, pinyin-pro.
- Polyphonic reading documentation, pinyin-pro.