From code to flowchart,
in seconds

rombik follows ISO 5807 (GOST 19.701-90): correct shapes (oval, rectangle, diamond, parallelogram, loop hexagon, subprogram symbol), directions and labels. If the requirements are specific (different words, a single “End”, etc.) it’s configurable. So the chart matches both the standard and your teacher.

Building a chart, previewing it and even downloading a watermarked preview is free and needs no sign-up, with no limits (the watermark isn’t for submission). Clean, unwatermarked formats — Word (.docx), Visio (.vsdx), draw.io, Typst, Excalidraw, SVG, PDF, hi-res PNG — need a free account and cost 1 export each (3 functions in one file — 3 exports). Export packs start at $2.69 (“Lab” — 3 exports); the Pro editor adds custom labels and bonus exports. Full pricing is on the Pricing page.

Yes — there’s a Telegram bot. As a group: an admin tops up a shared balance once, and the whole group drops code files into the chat and gets ready charts in seconds — no sign-ups, much cheaper than one by one. Solo: you can also DM the bot — link your rombik account and render from your own export balance, no group.

Yes. The editor has a “Structogram” toggle — the same code becomes a structogram (nested boxes, no arrows). It exports in any format — Word, Visio, draw.io, Typst, Excalidraw, SVG, PNG, PDF — and works the same across every supported language.

To Word (.docx) and Visio (.vsdx) as native shapes; to draw.io and Excalidraw as board objects; Typst as typesetting code; plus SVG, PNG and PDF. The same set works for both flowcharts and structograms.

Fully supported: Python, JavaScript, TypeScript, C, C++, C#, Java, Go, PHP and Pascal. All core constructs (conditions, loops, functions/procedures/methods), plus lambdas and the ternary operator, are recognized automatically and drawn per ISO 5807. What is NOT drawn (exceptions, inline anonymous lambdas) is described honestly on the “How it works” page.

Yes — it’s one of the main use cases. Teachers generate dozens of ISO 5807 charts for handouts, lectures and examples: paste code — get a ready chart, export to Word as real objects (not a picture) and edit it for your course. For large volumes there’s an AI skill and batch generation — all charts at once.

Easiest — download as Word (.docx): the chart drops straight into your document as real objects, standard-compliant — no manual pasting needed.

By default the labels come ready — Yes/No, Input/Output. If your teacher wants otherwise, open “Settings” (the gear icon) → “Text & labels” tab and set any words you like: branch labels (Так/Ні · Yes/No · +/−), input/output words, the caption template “Figure N”.

Your code is sent to our server, where the engine builds the chart and returns it to you right away. We don’t publish your code or share it with third parties — it’s only used to generate the chart.

Large algorithms can be split into parts. The “✂ Split” button under the chart cuts it by height automatically. In the visual editor you split manually: lasso-select blocks (Shift+drag) → “⊞ Separate chart”, and “⊟ Merge” joins them back. Connector circles (A, B, C…) appear at the seams automatically.

Click “✎ Edit” under the generated chart. The visual editor opens, where you can double-click text to change it, add new blocks, draw arrows or reroute them.

Yes. rombik ships a ready-made skill for AI agents (Claude Code, etc.) — just ask, and the agent generates charts from your code. For scripts, CI, or your own app there’s an HTTP API and a CLI. Details on the “How it works” page. Same pricing — 1 function, 1 export.

That’s what the rombik format is for — you give the chart as a description, not code. With Pro it’s built in: in the editor pick the «🪄 Description / any language (AI)» language, type a description (or paste code in a language we don’t parse — assembler, Rust, pseudocode) and press «Generate». Important: the AI only translates it into the rombik language, while the chart itself is drawn to ISO 5807 by our deterministic engine — so it’s stable and exactly standard-compliant, not “whatever the AI imagined”. Then fine-tune it in the visual editor. (Without Pro, or as a fallback, copy a ready prompt into an external AI chat.)

A flowchart uses shapes joined by arrows (oval, rectangle, diamond) — the control flow is shown by lines. A Nassi-Shneiderman structogram uses nested boxes with no arrows at all: a sequence stacks top to bottom, branching is a condition triangle, a loop is a frame. Same logic, different look — rombik builds both from the same code, switched with one toggle.

It’s the standard for algorithm and program flowcharts: it defines which shapes mark the start and end (oval), a process (rectangle), a decision (diamond), input/output (parallelogram), a loop (hexagon), a subroutine call, and so on, plus the flow directions. It’s the standard used for flowcharts in academic work — and exactly what rombik follows, so it passes strict review.

Yes — just drag a file (.py .js .ts .go .php .cpp .c .java .cs .pas) straight into the code field of the editor. The language is detected from the extension automatically. You can also paste code the usual way — whichever is handier.

Yes — rombik runs online in the browser, nothing to install: on a computer, phone or tablet. Building a chart and exporting work anywhere; for fine manual editing in the visual editor a bigger screen is comfier.

Seconds. Paste code and the engine draws a ready standards-compliant flowchart right away — no queues, no waiting. You can edit or export it immediately.

Yes — with a free account your charts and history are saved and available from any device. Without signing up you can still build and preview a chart, but it won’t persist between sessions.

By hand, a single chart is tens of minutes: aligning shapes, arrows, and redoing it all after every code change. rombik builds it from code in seconds and exactly to standard, then hands it over as native editable shapes — right inside Word, Visio or draw.io, where you can tweak them if needed. So you don’t draw from scratch — you start from a ready, submission-grade result.