WebFX Readability Test Tool review
A useful free checker for formula-based readability reviews and basic sentence flags.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
WebFX Readability Test Tool is a free web-based checker for developers, copywriters, marketers, usability assessors, SEO professionals, educators, and other content authors. It analyzes pasted text, webpages, and uploaded documents, then reports readability results using six formulas: Flesch-Kincaid Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, Coleman-Liau Index, Automated Readability Index, and SMOG Index. The tool also provides word, sentence, complexity, and syllable statistics.
Its main strength is breadth within formula-based readability analysis. Users can compare multiple established scoring methods instead of relying on a single grade-level result. Sentence review adds practical context through hard and very hard sentence highlighting, plus passive voice and adverb highlighting. Input options cover a URL, pasted text, or uploaded TXT, DOC, and DOCX files. WebFX also describes an embed option for placing the tool on a webpage, which fits teams that want readability checking available alongside their own content workflows.
The product remains focused rather than a broad content-authoring environment. Its published capabilities emphasize scores, statistics, and targeted highlights, so it is a better fit for reviewing clarity and sentence complexity than for managing a wider writing process. Web access keeps the workflow straightforward, while the supported upload formats suit common document checks but do not extend beyond TXT, DOC, and DOCX. Choose it for free, multi-formula readability analysis with several input methods; choose another option if your priority is a broader platform beyond readability measurement.
WebFX Readability Test Tool pros and cons
- Where it wins
- Scores text with six established readability formulas
- Highlights hard, very hard, passive, and adverb-heavy sentences
- Accepts URLs, pasted text, and TXT, DOC, or DOCX files
- Where it doesn't
- Access is limited to the web platform
- Analysis centers on readability scoring and sentence-level flags
- Document uploads are limited to TXT, DOC, and DOCX formats
WebFX Readability Test Tool fact sheet, pricing and score →
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