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What is code2flow?
code2flow is an online tool that turns source code or pseudocode into flowcharts automatically. Rather than drawing boxes and arrows by hand, you paste or upload code and it generates a visual diagram of the program's logic, which you can then export as SVG, PNG or PDF. It also offers plugins for JIRA and Confluence, so diagrams can be embedded directly into tickets and documentation pages. It is available at code2flow.
Who it is for
- Developers who need to explain an unfamiliar codebase to teammates or reviewers.
- Technical writers and analysts documenting logic for non-programmers.
- Teams using JIRA or Confluence who want diagrams living alongside the work item rather than in a separate drawing tool.
Practical trade-offs
- Automatic generation is fast and stays in sync with the code you feed it, but the layout is machine-chosen; complex functions can produce dense, hard-to-read charts that need manual cleanup.
- Exporting to SVG or PDF suits reports and slides; embedding via the JIRA/Confluence plugins suits living documentation.
- It is a diagramming aid, not a code analysis or debugging tool — treat the output as a communication device, not a source of truth about runtime behavior.
A useful next step: take one moderately complex function you already understand, generate its flowchart, and check whether the diagram matches your mental model. If it does, the tool is a good fit for onboarding docs; if it does not, simplify the input or expect to edit the result.
How do I convert pseudocode to a flowchart with code2flow?
Paste your pseudocode into the editor at code2flow, and it renders a flowchart automatically. There is no manual box-drawing step: the tool parses the structure of your text and lays out the diagram for you.
What the conversion relies on
The parser reads control-flow keywords rather than free-form prose. To get a clean chart, write pseudocode with recognizable blocks:
- A start or entry statement, then sequential steps on their own lines.
- Conditionals written as
if/else if/else, with the condition on the same line. - Loops written as
whileorfor, with the loop body nested underneath. - A clear end or return statement.
Indentation matters, because nesting is what tells the tool which steps sit inside a branch or loop.
A short example
start
get user input
if input is empty
show error
else
process input
while more items
handle item
return result
end
Practical workflow
- Draft the pseudocode in a plain text editor first, so you can fix logic before styling.
- Paste it into the online editor and check that branches and loops appear where you expect.
- Adjust indentation or keyword wording where the chart misreads a block.
- Export the result. The site advertises SVG, PNG and PDF output, and plugins for JIRA and Confluence, which suits teams documenting logic inside those tools.
Who this fits
It is a good match if you already think in pseudocode and want a diagram for documentation, code review or a design discussion. It is a weaker match if you need pixel-level control over layout, or if your pseudocode is written in loose prose — you will spend more time rewriting text than drawing.
Next step: start with a five-line snippet containing one if and one loop. If that renders correctly, your keyword and indentation conventions are right, and you can paste the full routine with confidence.
Can I integrate code2flow with JIRA and Confluence?
Yes. code2flow offers plugins for both JIRA and Confluence, so the flowchart generation can sit inside the tools your team already uses rather than in a separate browser tab.
What that means in practice
- In Confluence: you can embed generated diagrams directly into documentation pages, keeping architecture and process docs next to the written explanation. Useful for onboarding guides, design decision records and runbooks.
- In JIRA: diagrams can be attached to or generated from issue context, which helps when a ticket needs to show control flow before anyone touches the code.
Who benefits most
| Situation | Value of the integration |
|---|---|
| Teams documenting legacy code | Diagrams live beside the spec, not in a separate folder |
| Engineering + non-engineering stakeholders | Reviewers see flow logic without installing anything |
| Ticket-driven workflows | Flowcharts travel with the issue through its lifecycle |
Trade-offs to weigh
- Plugin availability depends on your JIRA/Confluence deployment type (Cloud vs. self-hosted) and admin permissions — confirm with your Atlassian admin before promising it to a team.
- Embedding diagrams in docs creates a maintenance question: who regenerates them when the code changes? Decide that upfront, or stale diagrams become worse than none.
- The product also exports SVG, PNG and PDF, so if plugins aren't an option in your environment, export-and-attach is a workable fallback.
Next step: install the plugin in a single Confluence space or JIRA project first, run one real diagram through it, and check whether the embedded output stays readable at your page width before rolling it out more widely.
What export formats does code2flow support for flowcharts?
code2flow supports SVG, PNG and PDF export for the flowcharts it generates.
That range covers the two main ways people reuse a diagram: SVG for editing and scaling (it stays sharp at any size and can be tweaked in vector tools like Illustrator, Figma or Inkscape), and PNG for dropping straight into slides, tickets or documentation where a raster image is expected. PDF sits in between — useful when you need a print-ready or paginated file, for example attaching a flow diagram to a design or architecture document.
A practical decision guide:
- Editing or resizing later → SVG
- Pasting into Jira, Confluence, Slack or a slide deck → PNG
- Sharing a fixed, printable document → PDF
The tool is aimed at developers and technical writers who want a flowchart from pseudo code or existing code without drawing boxes by hand; its Jira and Confluence plugins suggest the PNG/SVG output is mainly meant to live inside issue trackers and team wikis. If you are evaluating it, generate one small flowchart first and export in all three formats, then open each in the destination tool you actually use — that quickly shows which format fits your workflow before you commit to it.
Is code2flow free to use, and what does the free trial include?
Yes, you can try code2flow without paying, and the site describes its trial as unlimited rather than time-boxed or credit-limited. That distinction matters: many online diagramming tools meter you by diagram count, export credits or a 7–14 day clock, so an unlimited trial is unusually permissive for evaluating a converter before committing.
What the free access covers, based on the product's own description:
- Automatic conversion of pseudo code into flowcharts
- An online, interactive editor rather than a one-shot generator
- Export to SVG, PNG and PDF
- Plugins for JIRA and Confluence
The JIRA and Confluence plugins are the strongest signal about intended audience. This is aimed at teams documenting existing logic inside ticketing and wiki workflows, not just individuals sketching a diagram once. A developer who needs to show a reviewer how a branching rule works can paste the logic, adjust the chart, and attach an exported image to the ticket or page.
A practical way to decide: run one real piece of your own logic through it, then export the same chart in both PNG and SVG. PNG is fine for pasting into a ticket or slide; SVG is what you want if the diagram will be resized or embedded in a wiki page, since it stays sharp. If the exported result needs heavy manual correction, the tool is saving you little; if it comes out close to publishable, the trial has told you what you need to know.
One caveat worth planning for: "unlimited free trial" describes the trial, not necessarily the paid product's limits, and the page evidence here does not spell out what changes after the trial ends — whether exports, plugin use or diagram count become restricted. Check the current terms before you build a team workflow around it. If you are comparing options, diagrams.net is a general-purpose free diagramming alternative for cases where you would rather draw the chart yourself than generate it from code.
How does code2flow compare to manual flowchart creation or other diagramming tools?
code2flow is best understood as a code-first diagramming tool: you paste in pseudocode or source and it generates the flowchart for you, rather than asking you to drag shapes around a canvas. That single difference drives most of its advantages and limitations.
Where it beats manual flowchart creation
- Speed and consistency. Hand-drawn flowcharts drift in style and layout as they grow, and redrawing one after a logic change is tedious. Generating from code means the structure comes from the source, so a revised snippet produces a revised diagram.
- No layout work. You skip aligning boxes, routing arrows and re-spacing branches — the parts of manual diagramming that consume the most time and add no information.
- Useful for explaining logic. A generated chart is a good artifact for a code review, a design doc or a handover, because it reflects actual control flow rather than someone's recollection of it.
- Export options. The site lists SVG, PNG and PDF output, so the result can go into documentation or a slide deck.
Where manual or general diagramming tools win
- Free-form architecture. Sequence diagrams, system context diagrams, data models and whiteboard sketches have no code to generate from. A general diagramming tool handles those; code2flow does not.
- Presentation polish. Generated layouts are functional, not designed. If the diagram is customer-facing, you will likely still adjust it by hand.
- Ambiguous or messy input. Generation depends on the code being parseable and reasonably structured. Sparse pseudocode or heavy framework magic can produce a chart that misses the real behaviour.
Rough comparison
| Need | code2flow-style generation | Manual / general diagramming |
|---|---|---|
| Flowchart from existing logic | Strong fit | Slow, error-prone |
| Keeping diagram in sync with code | Re-generate | Manual rework |
| Architecture, sequence, data models | Not the target | Strong fit |
| Visual polish and branding | Limited | Full control |
| Ad-hoc sketching in a meeting | Poor fit | Strong fit |
Who should use which
- Developers documenting a function or algorithm: try generation first — you will usually get a usable draft in seconds.
- Teams maintaining living documentation: generation plus a plugin route (the site mentions JIRA and Confluence integrations) reduces the "diagram is out of date" problem.
- Designers, architects or anyone diagramming non-code systems: a general diagramming tool is the better default.
Next step
Take one function you have struggled to explain in a meeting, generate a chart from it, and compare that against the last hand-drawn version. If the generated chart captures the branches correctly, adopt generation for logic diagrams and keep manual tools for everything else. The site offers a free trial, and payment runs through Stripe, so you can test that workflow before committing.
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