Doc to Markdown

Convert documents to high-quality markdown with intelligent multi-tool orchestration and automatic DOCX post-processing.

Architecture: Pandoc (best-in-class extraction) + 8 post-processing fixes (our value-add).

Quick Start

# DOCX → Markdown (one command, zero manual fixes)
uv run --with pymupdf4llm --with markitdown scripts/convert.py document.docx -o output.md --assets-dir ./media

# PDF → Markdown
uv run --with pymupdf4llm --with markitdown scripts/convert.py document.pdf -o output.md

# Run tests
uv run --with pytest pytest scripts/test_convert.py -v

Dual Mode

Tool Selection

DOCX Post-Processing (automatic)

When converting DOCX via pandoc, 8 cleanups are applied automatically:

+:---+

TestPostprocessPipeline

  ---- ----

TestSimpleTable

media/media/

media/

test_stats_tracking

{width="..."}

test_pandoc_attributes_removed

**粗体**中文

**

TestCjkBoldSpacing

test_code_block_with_language

\[...\]

[...]

test_escaped_brackets_fixed

[[text]](url)

[text](url)

test_double_bracket_links_fixed

CJK Bold Spacing — why and how

DOCX uses run-level styling (no spaces between bold/normal runs in CJK text). Markdown renderers need whitespace around

**

Rule: if a

**content**

Before: 打开**飞书**，就可以    → some renderers fail to bold
After:  打开 **飞书** ，就可以  → universally renders correctly

Heavy Mode Workflow

Heavy Mode runs multiple tools in parallel and selects the best segments:

1. Parallel Execution: Run all applicable tools simultaneously
2. Segment Analysis: Parse each output into segments (tables, headings, images, paragraphs)
3. Quality Scoring: Score each segment based on completeness and structure
4. Intelligent Merge: Select best version of each segment across tools

Merge Criteria

Image Extraction

# Extract images with metadata
uv run --with pymupdf scripts/extract_pdf_images.py document.pdf -o ./assets

# Generate markdown references file
uv run --with pymupdf scripts/extract_pdf_images.py document.pdf --markdown refs.md

Output:

• Images:

  assets/img_page1_1.png

  ,

  assets/img_page2_1.jpg

• Metadata:

  assets/images_metadata.json

  (page, position, dimensions)

Quality Validation

# Validate conversion quality
uv run --with pymupdf scripts/validate_output.py document.pdf output.md

# Generate HTML report
uv run --with pymupdf scripts/validate_output.py document.pdf output.md --report report.html

Quality Metrics

Merge Outputs Manually

# Merge multiple markdown files
python scripts/merge_outputs.py output1.md output2.md -o merged.md

# Show segment attribution
python scripts/merge_outputs.py output1.md output2.md -o merged.md --verbose

Path Conversion (Windows/WSL)

# Windows to WSL conversion
python scripts/convert_path.py "C:\Users\name\Documents\file.pdf"
# Output: /mnt/c/Users/name/Documents/file.pdf

Common Issues

"No conversion tools available"

# Install all tools
pip install pymupdf4llm
uv tool install "markitdown[pdf]"
brew install pandoc

FontBBox warnings during PDF conversion

• Harmless font parsing warnings, output is still correct

Images missing from output

• Use Heavy Mode for better image preservation
• Or extract separately with

  scripts/extract_pdf_images.py

Tables broken in output

• Use Heavy Mode - it selects the most complete table version
• Or validate with

  scripts/validate_output.py

Bundled Scripts

convert.py

test_convert.py

merge_outputs.py

validate_output.py

extract_pdf_images.py

convert_path.py

References

• references/benchmark-2026-03-22.md

  - 5-tool benchmark (Docling/MarkItDown/Pandoc/Mammoth/ours)

• references/heavy-mode-guide.md

  - Detailed Heavy Mode documentation

• references/tool-comparison.md

  - Tool capabilities comparison

• references/conversion-examples.md

  - Batch operation examples