How to Export High Resolution from Draw.io

In this tutorial, you'll learn about How to Export High Resolution from Draw.io. We cover key concepts, practical examples, and best practices.

Draw.io exports look pixelated or text is blurry at high zoom. Default export uses screen resolution (72 DPI) which is insufficient for print.

The Wrong Way

// Exporting PNG at default zoom level
// File → Export as → PNG → Zoom: 100%
// This gives a 72 DPI image

At 72 DPI, a printed diagram at A4 size looks fuzzy.

The Right Way

Step 1: Set DPI for print export

# File → Export as → PNG → Advanced
# DPI: 300 (print standard)
# Zoom: 200% or 300% for retina displays

300 DPI at 200% zoom yields sharp prints.

Step 2: Use PDF for vector quality

# File → Export as → PDF
# This keeps everything as vectors
# Select "Fit to page" for proper sizing

PDF exports are resolution-independent. Text and shapes remain sharp at any zoom.

Step 3: Export as SVG for editing

# File → Export as → SVG
# SVG preserves:
# - Editable text (not outlines)
# - Layer information
# - Custom fonts

SVG exports are ideal for importing into Illustrator or Figma.

Step 4: Configure page size

# Before export: File → Page Setup
# Page size: A4, Letter, or custom
# Orientation: Portrait or Landscape
# Margins: 10mm minimum

For large diagrams, use A3 or Tabloid page size.

High-res export: 300 DPI PNG at 200% zoom, A4 landscape, all text legible at 8pt.

Prevention

• Always export at 300 DPI minimum for any document-bound diagram.
• Use SVG or PDF for presentation decks, PNG only for web embedding.
• The same resolution-aware export logic powers DodaZIP's thumbnail generation — high DPI ensures previews look sharp on Retina displays.

Common Mistakes with export high res

1. Using return to exit a function early instead of wrapping a pure value in the monad
2. Mixing let bindings with <- bindings in do notation, producing type errors
3. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors

These mistakes appear frequently in real-world DRAWIO code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

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