Structogram generator from code
Paste code — get a Nassi-Shneiderman structogram: nested boxes, not a single arrow. The same engine as for ISO 5807 flowcharts — just a different view of the algorithm. 10 languages, export to any format.
What a structogram is
A structogram (Nassi-Shneiderman diagram, NSD) shows an algorithm as nested boxes with no arrows. The whole logic reads top to bottom as a single block, so the structure is clear at a glance.
Sequence
Actions one after another — a stack of boxes top to bottom.
Branch
A condition is a triangle with “Yes” / “No”, with two columns below.
Loop
Repetition is a frame wrapping the loop body on the side and top.
Who it’s for
Structograms are often required at universities as an alternative to flowcharts: they are more compact, don’t tangle you in arrows, and show nesting directly. If your assignment asks for a structogram, rombik builds it in seconds.
How to make a structogram
Paste code
Python, JavaScript, TypeScript, C, C++, C#, Java, Go, PHP or Pascal — or drag a file in.
Flip the “Structogram” toggle
The same function instantly becomes a Nassi-Shneiderman structogram.
Save in the format you need
Word, Visio, draw.io, SVG, PNG or PDF — as native objects, not a picture.
Any format
A structogram exports just as widely as a flowchart — as native objects of your chosen tool: Word (.docx), Visio (.vsdx), draw.io, Excalidraw, plus SVG, PNG and PDF.
Works across every language
The structogram is built by the same parser as flowcharts — the same for Python, JavaScript, TypeScript, C, C++, C#, Java, Go, PHP and Pascal. Nothing extra to configure.
Try a structogram right now
Paste code — and in seconds you’ll have a ready Nassi-Shneiderman structogram.
Open the editor