Delimiter Readability Checker vs DO101 Readability Checker

Delimiter Readability Checker is a free web tool that scores English text with Flesch Reading Ease, Flesch–Kincaid Grade, and Gunning Fog formulas. It shows sentence and syllable averages behind the scores, updates results automatically in the browser, and does not send entered text to a server. A Load file control accepts text, and a Copy control copies results. The page suggests checking public-facing copy, plain-English requirements, long articles, and draft rewrites. It includes sentence analysis and clarity recommendations, and no account is required. The formulas were calibrated on English prose, so scores for other languages are not meaningful. They assess sentence and word length rather than clarity, accuracy, or structure. Syllable counting is heuristic, so individual words may be counted incorrectly. The tool has a free plan at free, with no paywall. Support is available at [email protected], although replies are not instant and no response time is promised.

DO101 Readability Checker has no write-up on Specifiction yet; its figures are above.