ProseScore
Free readability analyzer with 8 formulas.
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CKMTools

ProseScore - Free readability analyzer with 8 formulas.

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ProseScore analyzes your writing with 8 readability formulas (Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG, ARI, Dale-Chall, Spache, Linsear Write), plus sentiment analysis, keyword extraction, and SEO scoring. Everything runs client-side in your browser — your text never leaves your device. Free tier gives you the core score and stats. Pro ($3.99/mo or $19.99 lifetime) unlocks all 8 formulas, sentiment, keywords, SEO, markdown export, and analysis history. Built with textlens.

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Hey Product Hunt! I'm Christopher, the maker of ProseScore. I built this because every readability tool I tried either gave me a single score with no context, shipped my text to a server, or wanted $20/month for basic analysis. ProseScore runs 8 readability formulas — Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI, Dale-Chall, Linsear Write, and Flesch Reading Ease — and averages them into one consensus grade. On top of that you get sentiment analysis, keyword extraction, SEO scoring, and extractive summarization. The part I'm most proud of: everything runs client-side in your browser. Your text never leaves your machine. No server, no API calls, no accounts required to start. It even works offline once the page loads. Under the hood it's powered by textlens, an open-source TypeScript library we published on npm. If you're a developer who wants readability scoring in your own app or CI pipeline, that's there for you too. Free tier gives you Flesch-Kincaid, word count, and basic stats. Pro unlocks all 8 formulas, sentiment, keywords, SEO scoring, markdown export, and analysis history — $3.99/mo or $19.99 for lifetime access. Would love to hear what you think. What features would make this more useful for your workflow?