Markups – A free markdown editor with real-time preview and advanced diagram support

Summary: Markups is a privacy-focused online markdown editor featuring real-time preview, Mermaid diagrams, KaTeX math rendering, syntax highlighting, and export to PDF, HTML, or DOCX without requiring login. It uses the Monaco editor engine to provide IDE-like features and works offline as a progressive web app.

What it does

Markups enables users to write markdown with live preview, including complex Mermaid flowcharts and KaTeX math, while offering syntax highlighting and one-click export to multiple formats. It saves files locally and functions offline without ads or account requirements.

Who it's for

It is designed for developers and technical users who need to create, preview, and export markdown documents with diagrams and math without friction or sign-up barriers.

Why it matters

Markups eliminates common issues with online editors such as forced sign-ups, broken formatting, and lack of support for advanced markdown features, streamlining documentation workflows.