Work with Markdown & Diagrams, Visually.
A set of fast, secure, and 100% browser-based developer utility tools to boost your documentation workflow. No registration required.
Table Generator
Visually design, edit, and export rich Markdown tables. Import CSV/TSV, manage alignment, and format instantly in your browser.
Open Tool
Diagram Generator
Write Mermaid.js syntax and preview beautiful flowcharts, sequence diagrams, and class diagrams in real-time. Export to PNG/SVG.
Open Tool
Why Choose DevToy?
Lightning Fast
Static site rendering on the edge CDN. Loads instantly and runs completely in your browser.
Privacy First
Your data never touches our servers. All parsing, rendering, and drafts are stored locally.
100% Free
No paywall, no registration, no hidden costs. A fully open-source and free tool suite.