Markdown ↔ PDF · JSON ↔ TOON 100% local
Batch convertPro
Type Markdown, then “Download PDF”. Everything stays in your browser.
Input
Markdown source

Drop a Markdown or PDF file here

or click here to choose a file

Supports .md, .markdown, .txt, and .pdf files

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documents converted worldwide Your files never leave your browser. Only an anonymous +1 is counted, never your documents.

Local document converter

Markdown to PDF, JSON to TOON, and TOON to JSON in your browser.

MarkDone is a local converter hub for document, diagram, README, PDF, JSON, and TOON workflows. Pick the focused tool for your source format; each converter runs in the browser so drafts, repository docs, API payloads, and prompt files stay on your device.

PrivateConversion runs locally in the browser.
FastNo account, upload queue, or backend job.
UsefulBuilt for notes, prompts, docs, and structured data.
Markdown to PDFGeneral notes, AI output, reports, tables, code blocks, and printable Markdown documents. Word to PDFModern DOCX files, meeting notes, draft reports, business handoffs, and private Word documents. README to PDFGitHub README.md files, repository handoffs, private repo documentation, badges, and GFM-style tables. Mermaid to PDFFlowcharts, sequence diagrams, ER diagrams, class diagrams, Gantt charts, and architecture visuals. JSON to TOONCompact structured data for prompts, examples, API payload summaries, and AI workflows. YAML to JSONCI configs, Docker Compose, and Kubernetes manifests parsed into clean JSON for scripts and APIs. JSON to YAMLAPI payloads and JSON data turned into readable YAML for Compose, Kubernetes, and CI workflows.

A hub, not another Markdown landing page

The home page lists the available local tools and routes each job to the right converter. The dedicated Markdown, README, Mermaid, JSON, TOON, and PDF pages carry the format-specific details.

Local conversion without an account

Open a source file, preview the result, and download the converted output from the browser. MarkDone avoids upload queues and server-side document processing for everyday private files.

Supported local converters

  • Markdown to PDF for broad prose and code documents.
  • README to PDF for GitHub repository documentation.
  • Mermaid to PDF for diagram-first exports.
  • JSON to TOON for compact prompt-friendly structured data.
  • TOON to JSON for clean, copy-ready JSON output.
  • PDF to Markdown for local text extraction workflows.

From the blog

Is my Markdown, JSON, or TOON uploaded?

No. MarkDone runs the conversion in your browser. Your text stays on your device.

What can MarkDone convert right now?

It currently supports Markdown to PDF, JSON to TOON, TOON to JSON, and PDF to Markdown. All conversions run locally in your browser.

What is TOON?

TOON is a compact text format for structured data. It is useful when you want JSON-like information in a shorter, readable form for AI and developer workflows.

Can I use MarkDone offline?

The converter logic is bundled into the page. A future PWA version will make offline launch and installation more explicit.

Why use a local converter?

Local conversion is safer for drafts, business notes, prompts, and documents that should not be uploaded to an unknown server.