Free Pseudocode to Flowchart Converter
Transform your algorithm pseudocode into clear, professional flowcharts instantly. Perfect for learning, teaching, and documentation.
A textbook algorithm to a flowchart
Binary search, the standard pseudocode example.
Input
What the AI produces
Textbook pseudocode → textbook flowchart in one step. Perfect for teaching, interview prep, or refactoring legacy algorithm documentation.
What is pseudocode-to-flowchart?
Write your algorithm in any pseudocode style — IF/THEN/ELSE, WHILE/DO, BEGIN/END, indentation-based, or a casual mix — and Flowova maps it to standard flowchart symbols: rectangles for processes, diamonds for decisions, parallelograms for I/O, ovals for start/end. The output uses canonical NIST flowchart shapes, which is what most CS coursework expects. Best for algorithms up to about 30 steps; longer ones read better when split into sub-flows.
Convert Pseudocode to a Flowchart
Write Your Pseudocode
Paste pseudocode — BEGIN/END blocks, IF/THEN/ELSE, WHILE/REPEAT/FOR loops, function definitions, variable assignments. The AI handles multiple pseudocode dialects (Knuth-style, modern indentation-based, etc.).
- BEGIN/END, IF/THEN/ELSE, WHILE/DO syntaxes
- Indentation- or keyword-based — either works
- Up to 10,000 characters per paste
AI Creates Flowchart
The control structures become flowchart constructs (decision diamonds for IF, back-edges for loops, separate flows for function calls). Variable assignments become process boxes.
- Canonical NIST shapes (most CS coursework expects these)
- Parallelograms for I/O, diamonds for decisions
- Algorithms above ~30 steps read better split
Export Free
Refine — pseudocode is often more abstract than real code, so the diagram is a good place to add concrete examples or annotations.
- Edit labels to match your textbook conventions
- Print-ready resolution for assignments
- Free PNG; SVG is Pro for vector quality
Pseudocode to Flowchart Features
Style-Agnostic Parsing
BEGIN/END, IF/THEN/ELSE, WHILE/DO/ENDWHILE, structured English, indentation-based — the AI handles any common pseudocode style without configuration.
NIST Standard Shapes
Rectangles for processes, diamonds for decisions, parallelograms for I/O, ovals for start/end. Matches the conventions in most CS textbooks and coursework rubrics.
Algorithm-Specific Patterns
Binary search, merge sort, BFS/DFS, dynamic programming, and other classic patterns generate diagrams that match standard textbook presentations.
Print-Ready Resolution
PNG export at 2x pixel ratio reads cleanly in printed assignments and projector slides. SVG (Pro) for crisp at any zoom level on PDFs.
Big-O Annotations
When your pseudocode includes complexity comments ("// O(n log n)"), they survive the conversion as inline notes on the relevant step.
Split Long Algorithms
Algorithms over ~30 steps benefit from being split into sub-routines — Flowova suggests natural split points in the generation log.
When to use pseudocode-to-flowchart
Use this tool for
- Teaching algorithms — turn textbook pseudocode (BEGIN/END, IF/THEN/ELSE) into a visual aid for the lecture or handout.
- Interview prep — visualize binary search, BFS, or quicksort before implementing in a real language.
- Algorithm design: sketch in pseudocode, get the flowchart, share with reviewers before committing to syntax.
- Documenting internal algorithms in a tech doc where the actual implementation would be too dense to scan.
Use a different tool for
- Real source code that compiles — Code-to-Flowchart's language-aware parser is more faithful to return statements, exceptions, and early exits.
- Plain-English descriptions without keyword markers — Text-to-Flowchart handles unstructured prose more naturally.
- ML decision trees or scikit-learn output — use the library's own `plot_tree` or graphviz export.
- Mathematical proofs and theorem chains — those need a math-aware notation tool like LaTeX with TikZ, not a flowchart.
Pseudocode to Flowchart FAQ
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