MarkDone
File converter that never sees your files — 100% local
What it does
Most file converters upload your documents to a server. MarkDone does everything locally in the browser — your files never leave your device. Tools available: Markdown → PDF (with LaTeX/KaTeX + syntax highlighting) Word (DOCX) → PDF README → PDF Mermaid diagrams → PDF JSON ↔ TOON (compact LLM-friendly format) JSON ↔ YAML No account. No upload. No BS.
Convert Markdown, Word DOCX, Excel XLSX, README files, Mermaid diagrams, PDF, JSON, TOON, and private AI context packs locally in your browser. No upload, no account.
MarkDone is a local converter hub for document, diagram, README, PDF, JSON, TOON, and LLM context 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. The home page lists the available local tools and routes each job to the right converter. The dedicated Markdown, Word, Excel, README, Mermaid, JSON, TOON, and PDF pages carry the format-specific details. 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. No. MarkDone runs the conversion in…from markdone.dev
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