MarkdownPreview.org – A teaching-first Markdown editor for improved writing quality

Summary: MarkdownPreview.org is a Markdown editor that provides real-time, rule-based feedback to enhance writing clarity and style. It offers word-level diffs, configurable writing quality checks, and detailed exportable reports, supporting multiple languages with a focus on Japanese.

What it does

It delivers real-time writing feedback through rule-based checks, highlighting improvements with word-level diffs and style optimization. Users can export reports for review and learning.

Who it's for

Designed primarily for Japanese writers, it also supports English, Chinese, French, and Spanish users such as researchers, editors, and anyone focused on writing quality.

Why it matters

It addresses the need for clearer, more consistent writing by showing specific improvements and explaining why they matter, beyond simple Markdown formatting.