Feature Request: Export all pages as separate PNG files

[EngenMe]

Problem

When a diagram has multiple pages, exporting as PNG only exports one page at a time.
For large ERDs or architecture diagrams, this is tedious.

Additionally, exporting a large single-canvas diagram produces blurry,
unreadable PNGs — even at higher scale values.

Expected Behaviour

• File > Export As > PNG should include an "Export all pages" option
• Each page saves as filename-page-1.png, filename-page-2.png, etc.
• CLI should support --all-pages for PNG (currently PDF-only)

Why This Already Makes Sense

The CLI already supports --all-pages for PDF:
drawio --export --format pdf --all-pages myfile.drawio
The same should work for PNG — the loop mechanism already exists.

Workaround I'm Currently Using

I had to write a Python script to split the canvas and loop the CLI manually.
Happy to share it if useful.

Environment

• draw.io Desktop 28.2.5
• Linux Ubuntu 24

[draw-io-triage-bot]

👋 Thank you for opening this issue!

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Summary: The user requests a built-in "Export all pages" option for PNG export (both in the GUI and CLI via --all-pages), similar to what already exists for PDF export. They also mention that large single-canvas diagrams produce blurry PNGs even at higher scale values.

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💡 Possible Solution Found

We found a potentially relevant solution in a previous issue:

The CLI already supports exporting individual pages by index using --page-index. While there's no built-in --all-pages flag for PNG, you can loop through pages in a shell script. For example: for i in $(seq 0 N); do drawio --export --format png --page-index $i -o "filename-page-$i.png" myfile.drawio; done. Note from issue #2247: avoid running multiple draw.io CLI instances in parallel, as this causes disk cache errors and segfaults. Run exports sequentially instead, or use --disable-gpu and separate user data directories (--user-data-dir) if you must parallelize. The user in #2247 had a similar batch-export use case and these were the recommended approaches.

📎 Source: #2247

Please check if this addresses your issue. If not, let us know what's different about your situation.

🔍 Possible Related Issues

This issue might be related to existing issues:

🟡 #2247 - Parallel PNG exports cause various errors, even segmentation faults
Directly relates to batch PNG export via CLI. The discussion covers the limitations of CLI export and workarounds for exporting multiple pages/files as PNG, which is the core of this feature request.

Please check if any of these address your issue. If this is a duplicate, we may close this issue and continue the conversation there.

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