For conversion
Export editable .docx files, print to PDF, and bring old Word files back into markdown.
Features
Everything you need to turn markdown and AI output into Word documents, PDFs, and architecture diagrams.
Document conversion, diagramming, and AI polish in one place
Markdownyi combines markdown to Word export, Word to markdown import, Mermaid diagrams, PlantUML diagrams, PDF handoff, and personal file storage. Each feature is built around the same goal: keep markdown easy to edit while making the final document easy to review.
For diagrams
Create Mermaid and PlantUML source, preview visuals, and include diagrams in documents.
For AI output
Paste AI-generated markdown, clean up formatting, and ship a professional deliverable.
Feature guide
Pick the workflow that matches your document source
Start with Markdown to Word when your source is markdown from an AI assistant, README, wiki, or notes app. Use Word to Markdown when the source is a legacy .docx that needs to become editable text again. Open the UML and diagram editor when the deliverable needs flowcharts, sequence diagrams, C4 views, class diagrams, or architecture visuals.
Before export
Check headings, table width, list nesting, code fences, image placement, and diagram size in the live preview.
During review
Send .docx when people need comments and Track Changes. Send PDF when the layout should stay fixed.
After feedback
Keep the markdown source, apply edits there, and export again so the source and delivery file do not drift apart.
Core features
Feature
Markdown to Word: professional .docx in one click
Paste markdown from any editor or AI assistant, preview paginated A4 output, and download a Word document your team can edit immediately.
Feature
Word to Markdown: unlock legacy documents
Import .docx files, preview the markdown output, and download clean MD plus images for your knowledge base or next AI prompt.
Feature
UML diagram editor in your browser
Sketch architecture, document APIs, and align engineering teams with text-based diagrams that version control like code.
Feature
Mermaid diagrams: from code to visuals
Write Mermaid syntax, preview with themes and zoom, export images, or embed directly in markdown-to-Word documents.
Feature
PlantUML online: serious UML in the browser
The standard for rigorous UML and C4 architecture diagrams, without local Java setup.
Feature
Markdown to PDF: pixel-perfect A4
Preview paginated output, then save as PDF from the browser. Matches your .docx formatting choices.
Feature
Markdown to DOCX: native Word files
Real .docx output with styles, tables, and embedded diagrams, not a PDF disguised as Word.
Feature
Mermaid diagrams inside Word
Fence blocks with ```mermaid render in preview and export to .docx automatically.
Feature
Sequence diagrams for APIs and systems
Text-based sequence diagrams you can generate with AI and export to Word or image formats.
Feature
Flowchart maker: Mermaid-powered
Describe flows in text, preview instantly, share as images or inside markdown exports.
Comparisons
Use cases
View all →Use case
Technical docs: markdown in, Word out
One toolkit for prose, code samples, architecture diagrams, and client deliverables.
Use case
Architecture diagrams that ship with specs
Keep diagram source next to markdown documentation and export everything together.
Use case
Academic markdown → Word for review
Write in markdown or export from AI tools; submit .docx when required.
Use case
API docs: formatted for stakeholders
Developers write markdown; product and legal get Word.
Use case
README → Word for the whole team
Share repository documentation with people who do not use GitHub.