Estimate Flesch Reading Ease, Flesch–Kincaid grade level, ARI, and Coleman–Liau from pasted prose — with word, sentence, and estimated syllable counts. All math runs in your browser; nothing is uploaded for scoring, consistent with APK Analyzer and APK String Extractor. Best suited to English-style copy; formulas are heuristics, not editorial judgment.
Results update as you type (debounced). Sentences are inferred from . ! ? — add closing punctuation for clearer splits. Related:
Keyword Density Checker,
Word Frequency Counter,
Title & Meta Length Checker.
Classic readability tests estimate how difficult a passage is to read based on average sentence length, word length, and (for Flesch-style scores) approximate syllable counts. They are useful for comparing drafts, setting editorial targets, and communicating with stakeholders — but they do not measure factual accuracy, tone, or whether the topic matches search intent. Processing stays on your device, like APK String Extractor keeping extracted strings local.
Flesch Reading Ease is usually interpreted on a 0–100 scale (higher = easier). Flesch–Kincaid grade level maps roughly to U.S. school grades. ARI (Automated Readability Index) and Coleman–Liau estimate grade level using character-based averages instead of syllables — they can diverge from Flesch when copy is heavy on long words or unusual punctuation. Treat all figures as approximate.
Syllables are counted with an English heuristic (not a dictionary). Sentences are split on . ! ?; text without terminal punctuation may count as one sentence, which can skew averages — add periods where appropriate before judging scores.
Your text can be stored in localStorage only on your machine so the field repopulates on return visits. It is not transmitted to DroidXP for analysis — the same privacy story as
APK Analyzer (local inspection, no server-side processing of your files).
No. Scoring runs entirely in your browser — the same local-only model as APK Analyzer and APK String Extractor. Only normal static assets load from DroidXP.
No. They are statistical readability estimates for prose (mostly English-oriented). Search rankings and real user comprehension depend on many factors beyond a single formula.
Sentence boundaries, syllable heuristics, and which characters count toward averages vary by implementation. Two tools can both be reasonable yet disagree slightly — compare trends, not absolute decimals.
Syllables are estimated with English heuristics (vowel groups and common endings), not a pronunciation dictionary. Short words and edge cases can be off by one — treat totals as approximate.
Flesch Reading Ease is typically scored 0–100 (higher = easier). Flesch–Kincaid grade level approximates U.S. school grade difficulty. They use the same underlying averages but present different scales.
The Automated Readability Index and Coleman–Liau index estimate grade level using character and sentence averages rather than syllable estimates — useful cross-checks, still heuristics.
Text is split on sentence-ending punctuation (. ! ?). Lists, headings, or missing terminal periods may merge lines into fewer sentences than you expect — adjust punctuation for clearer splits.
Formulas are calibrated for English-style prose. Tokenization supports many scripts, but syllable logic targets Latin letters — scores for other languages may be misleading.
Yes — your draft can stay in localStorage on your device for convenience; it is not sent to DroidXP for analysis.
Input beyond about 500,000 characters is ignored for responsiveness. Very long documents can still slow the tab — prefer representative excerpts.