Private by default
Developer tools that stay on your machine
Convert OpenAPI, Mermaid, and Markdown without uploading a file. Open a tool and start — no account, no install.
- Your data never leaves the browser
- No sign-up — start immediately
- Open the page and use it — nothing to install
Tools
- OpenAPI → SDKGenerate a typed TypeScript SDK from an OpenAPI document with hey-api. The whole run stays in this browser.TypeScript ZIP
- Mermaid → SVG/PDFEdit Mermaid with a live preview, then download SVG or PDF. Source and export stay in this browser.SVG · PDF
- Markdown → PDFTurn Markdown into a printable PDF with GFM preview, themes, and page options. Nothing is uploaded.PDF export
Guides
Short comparisons of when a browser-only workflow makes sense — then jump into the matching tool.
- GuideOpenAPI to TypeScript SDKGenerate a typed TypeScript SDK from OpenAPI 3.x in your browser with hey-api. No upload, no server — paste JSON/YAML, pick client, download ZIP.Read guide
- GuideMermaid to SVG and PDFEdit Mermaid diagrams online with live preview, then export Mermaid to SVG or PDF in your browser. No upload, no account, no server.Read guide
- GuideMarkdown to PDFConvert Markdown to PDF online in your browser. GFM preview, themes, page size and margins. Export via print dialog — no upload, no account.Read guide