Analyze any text and get back clean, structured data.
Your text stays on our infrastructure, no third-party AI services.
Every endpoint returns predictable JSON.

What can you do with our API?

Readability

- Get six industry-standard scores: Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, ARI.
- Get a consensus grade level averaged across all formulas.
- Get actionable improvement hints (sentence length, word complexity, vocabulary diversity).

Statistics

- Word count, sentence count, paragraph count, character count.
- Average word length, average sentence length.
- Vocabulary richness (type-token ratio).
- Reading time and speaking time estimates.

Sentiment

- Compound score from -1 (very negative) to +1 (very positive).
- Proportional positive / negative / neutral breakdown.
- Plain-English label: positive, negative, or neutral.

Keywords

- TF-IDF ranked keywords and keyphrases.
- Unigrams, bigrams, and trigrams supported.
- Stop words and noise phrases filtered automatically.
- Frequency and position data included.

Language Detection

- Detects 12 languages with a confidence score.
- Returns alternative language candidates when confidence is split.
- Supported: English, Spanish, French, German, Portuguese, Italian, Dutch, Russian, Chinese, Japanese, Arabic, Korean

Batch & Compare

- Analyze multiple texts in a single API call.
- Compare two texts: cosine similarity score, shared keywords, side-by-side readability grades.
✅ Get full analysis from ***/analyze***.
✅ Get individual analysis from ***/stats***, ***/readability***, ***/sentiment***, ***/keywords***, ***/language***, ***/batch***, ***/compare***.
✅ Batch limited to 20 texts per call.
✅ Character limit of 50,000 per text.
✅ Fast response time.
✅ Deterministic results.