Flowcharts for Python
Paste a Python function and get an ISO-5807 flowchart in seconds: an elif chain becomes a cascade of diamonds, range becomes a loop, and a nested def becomes a subprogram symbol.
ISO 5807 · 10 programming languages · your chart in seconds
Flowcharts from Python code
rombik parses Python via its syntax tree: functions, if/elif/else, for and while loops, try/except, recursion. Type hints and decorators don’t get in the way — only the algorithm’s logic remains, drawn to the ISO 5807 standard.
def fizzbuzz(n):
for i in range(1, n + 1):
if i % 15 == 0:
print("FizzBuzz")
elif i % 3 == 0:
print("Fizz")
elif i % 5 == 0:
print("Buzz")
else:
print(i)How to make a flowchart from Python code
- 1 Paste your code
Copy a Python function into the editor or drag a file in.
- 2 Get the chart
The engine builds a flowchart to the standard. Toggle to a structogram if you need one.
- 3 Export
Word, Visio, draw.io, Typst, Excalidraw, SVG, PNG or PDF — native shapes, not a picture.
Python in rombik: frequent questions
Does rombik understand elif chains? +
Yes. Each elif becomes its own diamond attached to the previous “No” branch — exactly how the standard wants a cascade. Ten branches in a row are fine.
What about list comprehensions and lambdas? +
Named lambdas (f = lambda x: …) are drawn as ordinary actions. An inline comprehension stays a single expression inside its block — unrolling it into a loop would invent structure the code doesn’t have.
Does try/except show up on the chart? +
Yes: the try body, each except branch and finally become separate blocks.
What about type hints? +
Toggle “No type annotations” in settings: x: int = 5 becomes x = 5. That is usually what assignments ask for.
Drawing flowcharts by hand takes hours
Students — a report, lab, coursework, thesis. Teachers — handouts, lectures, assignments and their examples. Anywhere there is an algorithm, it has to be drawn as a standards-compliant flowchart: rulers, shapes, arrows, redoing it after every code change. rombik does this in a second, and you can adjust the result to any requirements.
Your flowchart — in the format you need
No dead images: your chart arrives in the native format of your tool. In Word and Visio — real editable shapes, in Typst — clean typesetting code, in Excalidraw and draw.io — board objects. Pick any of the twelve formats — all standard-compliant.
- Word (.docx) · Visio (.vsdx) — real editable shapes, not a pasted picture
- Typst — clean CeTZ code, native to academic typesetting
- Excalidraw · draw.io — native objects on the board and diagrams.net
- SVG · PNG · JPEG · WebP · GIF · PDF · HTML — universal: print, slides, the web
#import "@preview/cetz" #cetz.canvas({ rect((0,0), label: "Початок") line((0,0), (0,-1)) diamond(label: "n > 0") })
Nassi-Shneiderman structogram — same code, a different view
Nested boxes, not a single arrow: sequence is a stack, branching is a condition triangle, a loop is a frame. A clean view of the algorithm’s structure, often required in universities. One toggle in the editor — and the same function becomes a structogram.
- One click: flowchart ↔ structogram — from the same code
- Any format — Word, Visio, draw.io, Typst, Excalidraw, SVG, PNG, JPEG, WebP, GIF, PDF, HTML
- Works the same across every language — nothing to configure
What rombik does
Exactly per ISO 5807
Oval, diamond, parallelogram, loop hexagon, subroutine symbol — every shape exactly to standard. Strict academic review finds nothing to pick at.
Ten programming languages
Python, JavaScript, TypeScript, C, C++, C#, Java, Go, PHP and Pascal. The engine understands if/else, switch, loops, functions and methods — nesting of any depth.
Built-in visual editor
Right inside rombik: change a block’s text and shape, drag it, draw an arrow. Lasso-select blocks to split the chart into parts or merge them back. Comes with Pro.
Tall charts split neatly into pages
rombik auto-cuts an oversized chart into A4 pages with connectors (A, B…) — it drops into coursework cleanly, nothing clipped.
rombik right in Telegram
Don’t want to open the site? Send the bot your code in Telegram: a ready flowchart and a .docx land right in the chat.
- As a group: add the bot to your course chat — one plan for the whole chat, and everyone makes their first chart for free.
- Solo: DM the bot and link your account — render under your own plan.
- A code file or
/renderwith code → a standard flowchart in seconds.
For the whole group — one plan per chat for a month or a semester. One admin payment → the whole class renders.
Examples, updates and announcements — our Telegram channel →
Pick format & language → «Generate»
Done! Chat plan “Group” until 30.12.
What it costs
You see the chart on screen right away, for free — with a watermark. A plan removes it from both the preview and the files you submit: by the week, month or semester, no auto-charges.
Student
$1.49 / week
unlimited clean exports, a preview without the watermark and the Telegram bot. A semester costs less.
Pro
$2.99 / week
everything in Student + the chart editor, AI from a description, API, CLI and MCP.
For a group
$9.99 / month
a plan for the whole Telegram chat: one person pays, the whole group draws.
The on-screen chart and watermarked preview are always free; clean exports a month with an account — 1.
What people say
People who already submitted their charts on time.
to leave a review.
Something broke or have an idea?
Chart came out wrong, or a feature is missing? Drop a line — I read every message and fix things fast.
rombik grew out of my own coursework
The code worked, the assignment didn’t: it still needed a standard-compliant flowchart. Here was the paradox: my lecturer didn’t know Python and spent two minutes working out whether the code was even correct — yet rejected the chart in a second over a single wrong arrow. So instead of drawing dozens of charts by hand, I wrote an engine that does it deterministically, to the standard. The site, the bot and the API are mine too — one developer, not a studio.
Oleksii Odarchuk The full story →
The chart won’t draw itself. rombik will.
Paste your code — in seconds you’ll see a finished standards-compliant chart. You only pay for the clean file you submit.
Build a flowchart