Plain LanguageSay it plain. Keep it true.
Signature feature

The reading-level slider

Drag from the expert source down to plain language. The Flesch–Kincaid score updates live, the citation follows every version, and the meaning-drift check flags any point where simplification changed a fact that had to survive. Pick a subject, choose the second sample in each, and slide to the simplest level to see a real drift flag.

Health. Plain never means wrong.

Grade 8 · grade 7–8

Plain, the recommended public default. Drag from the expert source down toward plain language — the score and the drift check update as you go.

Plain version

If you have early high blood pressure, take 10 mg of lisinopril once a day. Stop taking it and call your doctor if you have heart symptoms such as chest pain. [1]

Source [1] 2017 ACC/AHA Guideline for High Blood Pressure in Adults. American College of Cardiology / American Heart Association · 2017. Carried through every version and language.


Hard (grade 16)Plain (grade 8)Simplest (grade 2)

Flesch–Kincaid grade 2.6 · reading ease 96/100 · Easy to read

✓ Meaning-drift check passed. Every dose, frequency, and contraindication in the source survived this reading level. Plain, and still correct.
$ plain rewrite --domain health --doc htn-stage1 --level 2
[ok] source loaded ............. 162 chars
[ok] reading grade ............. 2.6 (target grade 7–8)
[ok] flesch reading ease ....... 96/100
[ok] citation carried .......... [1] intact
[ok] guards checked ............ dose, limit, frequency, warning
[ok] meaning drift ............. none — safe to publish
generated in-session · nothing stored · no personal data