Vocabulary coverage estimator
Compare a passage against your explicit known-word list and separate token coverage from word-type coverage.
Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate. Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded. Up to 500,000 characters. Review the settings before running.
Your result
How to use Vocabulary coverage estimator
- Paste your own passage as plain text.
- Choose explicit matching or analysis settings.
- Review the bounded table and download complete JSON or CSV.
Useful next steps
Know exactly what is measured
Supply one known word per line, up to 10000 words. Matching uses NFC normalization and the selected case setting. No stemming, translation, inflection inference or dictionary is used. An empty known list marks every word unknown. Coverage is a descriptive fraction, not a proficiency estimate.
Keep the full report
Use up to 500000 text characters and 20000 word tokens. Reports allow up to 10000 matches or repeated phrase groups. JSON and CSV preserve the full report, with bounded exports up to 40 million characters and 500000 CSV records. Analysis runs locally with a 10-second timeout. Preview search and sort cover the first 200 rows; copy returns the summary. Download the full report for every row. Your text is not uploaded. Offsets refer to the original UTF-16 text. Machine report keys and your content are preserved. Formula-protected CSV changes risky cell prefixes; import columns as text when preserving exact identifiers.