DIO is a diagram from draw.io (diagrams.net) - an XML description of the shapes and connectors in a flowchart or diagram. draw.io stores a diagram as the mxGraph model, the same XML whether saved as .dio, .drawio or embedded in a PNG. Analyser handles .DIO alongside related formats such as .ABC, .AFL, .ARX and more. In Analyser's format library, .DIO sits in the System & disk category.

How do I open a .DIO file?

Drop a .DIO file onto Analyser at https://lab.valjdakosta.com/ and it is identified directly in your browser - no upload, no account and no software to install. A catch-all for rare and niche formats Analyser still identifies from their bytes: 3D caches and scans (Alembic ABC, FARO FLS/FWS), camera and design data (ARRIRAW ARX, Capture One masks, CATIA CGR), JBIG codestreams, firmware dumps (Binwalk), draw.io diagrams, OptimFROG DualStream audio, RTTTL ringtones, LaTeX style and class files, Sun Raster and Truevision TGA images, MPEG-2 streams, PVR/DVB recordings, Tiled tilesets, Windows Prefetch and Reaper project backups.

Can I open a .DIO file online for free?

Yes. Analyser is a free online .DIO identifier that runs entirely in your browser - your .DIO file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.DIO file - what it is and how to identify it online

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Home › Formats › .DIOID

What is a .DIO file?

DIO is a diagram from draw.io (diagrams.net) - an XML description of the shapes and connectors in a flowchart or diagram.

Did you know: draw.io stores a diagram as the mxGraph model, the same XML whether saved as .dio, .drawio or embedded in a PNG.
Analyser handles .DIO alongside related formats such as .ABC, .AFL, .ARX and more.
In Analyser's format library, .DIO sits in the System & disk category.
What Analyser reads: A catch-all for rare and niche formats Analyser still identifies from their bytes: 3D caches and scans (Alembic ABC, FARO FLS/FWS), camera and design data (ARRIRAW ARX, Capture One masks, CATIA CGR), JBIG codestreams, firmware dumps (Binwalk), draw.io diagrams, OptimFROG DualStream audio, RTTTL ringtones, LaTeX style and class files, Sun Raster and Truevision TGA images, MPEG-2 streams, PVR/DVB recordings, Tiled tilesets, Windows Prefetch and Reaper project backups.
Depth of analysis: .DIO is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
Open a .DIO file: Drag a .DIO file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .ABC · .AFL · .ARX · .BIE · .Binwalk · .CGR · .COMask · .FLS · .FWS · .H2V · .OFS · .PF · .RPP-bak · .RTX · .STY · .CLS · .SUN · .TP and more. See all supported file types.