Readability.ch review
A private, free browser tool for scoring text clarity across five readability formulas.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Readability.ch is a free, browser-based checker for editors, copywriters, translators, and others assessing text clarity. It analyzes text with Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, and LIX Readability Index scores. Alongside the scores, it provides statistics for words, sentences, syllables, and unique words, plus sentence-level readability coloring. The tool also includes writing guidance on sentence length, word choice, active voice, jargon, paragraph structure, and filler words, with support for multilingual text and multiple interface languages.
Privacy and access are central strengths. Processing occurs locally in the browser, and the published feature set supports offline use after the page has loaded. That makes Readability.ch a practical choice for checking private drafts without sending text to a remote processing service. Sentence coloring adds a quick way to identify variation in difficulty across a passage, while the five formulas offer more context than relying on a single score. URL-based sharing is available for short text analyses when collaboration or review requires a shareable result.
The tradeoff is focus. Readability.ch is web-only and centers on measurement, statistics, coloring, and general writing tips rather than a wider editorial workflow. It suits users who want a free, private readability check with several scoring methods and straightforward multilingual access. Teams looking for broader collaboration, extensive integrations, or a more comprehensive writing environment should choose a tool built around those needs instead. For individual clarity checks and lightweight editorial review, its narrow scope keeps the core task easy to understand.
Readability.ch pros and cons
- Where it wins
- Calculates five established readability scores in one place
- Shows word, sentence, syllable, and unique-word statistics
- Processes text locally and supports offline use after loading
- Where it doesn't
- Web-only, with no broader writing workflow
- URL sharing is limited to short text analyses
- Readability scoring may not replace detailed editorial review
Readability.ch fact sheet, pricing and score →
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