About Readability Analyzer

Our approach

Most readability tools — including the well-known ones — give you one score and one piece of advice: simplify. That’s backwards for half of professional writing. A pitch deck written at a 6th-grade level doesn’t read as accessible to a VC, it reads as thin. This tool is built around a different idea: the right readability target depends entirely on who’s reading, and getting that match right matters more than chasing the lowest possible score.

Readability Analyzer is built around the idea that good writing is audience-aware. If you are writing an investor update, patient discharge instructions, or peer-to-peer clinical documentation, the target is different from general consumer content — and the advice should be different too.

This tool lets you choose the audience you are writing for, then interprets the same formula scores against the standards and expectations relevant to that audience.

What makes this tool different

• Audience targets are first-class inputs — not marketing copy, but an interactive feature built into the tool itself.
• Five verified formulas shown together — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, Coleman-Liau, and SMOG, each verified against primary academic sources.
• Interpretation is rules-based and audience-specific — the guidance you see depends on which audience you selected, not a one-size-fits-all message.
• No AI rewrite feature — the tool stays fast, transparent, and free to use.

Who should use it

This tool is useful for writers who need to match a specific register or readability target, including:

• Marketers and content creators writing for general audiences
• Healthcare communicators working with patient-facing materials
• Legal and government writers meeting plain-language requirements
• Investor relations teams writing board memos, pitch decks, and executive updates
• Technical authors and clinical writers communicating with specialist peers

Why no AI rewriting

We intentionally avoid AI-powered rewrite features. Rewriting is an open-ended, conversational task that people already do well with dedicated AI tools like Claude, ChatGPT, or Gemini. A single-shot rewrite widget on a utility site cannot compete with that, and trying to match it would require a backend, per-request costs, and abuse infrastructure that would compromise the simplicity and speed of the tool. The formula-scoring task is different: it is deterministic, tool-shaped, and genuinely useful as a standalone utility.

To learn more about the formulas, see Formulas Explained. To try the tool, go back to the homepage.