Free Readability Checker — Flesch-Kincaid & More
The LetX Readability Checker is a free tool that scores your text with six algorithms — Flesch-Kincaid, Gunning Fog, SMOG, and others — to show its grade level and reading ease. It runs entirely in your browser, helping you write more clearly. Open it at tools.letx.app/readability.
Use Readability Checker now — free, no signup.
Open Readability CheckerFeatures
- Six algorithms incl. Flesch-Kincaid, Gunning Fog, SMOG
- Grade level and reading-ease scores
- Instant, in-browser analysis
- Free, no signup
Frequently asked questions
What is a good readability score?
For general audiences, a Flesch Reading Ease of 60–70 (roughly grade 8–9) is comfortable. Academic writing often scores lower; the checker shows several metrics so you can judge against your audience.
Which readability formulas does it use?
It computes Flesch-Kincaid, Gunning Fog, SMOG, and three more, so you can compare grade-level estimates.
Is the readability checker free?
Yes. It is free and runs entirely in your browser with no signup.
Related
Written by Shihab Shahriar Antor — AI Engineer & Founder of Shahriar Labs. Builder of LetX (collaborative LaTeX) and QuantumSketch (AI STEM video).