C Program to Flowchart Converter
Paste a C program and get the flowchart your lab record needs, drawn with the standard symbols: ovals for Start and Stop, parallelograms for scanf and printf, rectangles for calculations and diamonds for every condition. Nested loops are drawn as nested loops, not flattened.
- scanf as input and printf as output boxes
- for, while and do-while loops, including nested loops
- if / else if / else and switch-case as decisions
- Arrays and functions shown as clear process steps
- Animated dry run with a variable trace table
- Export PNG or PDF to print, or PowerPoint
How it works
- Paste your C program and a sample input
- The AI draws the flowchart
- Press ▶ Explain to check the logic
- Export it for your lab record
Try it with
- int n, i, sum = 0; scanf("%d", &n); for (i = 1; i <= n; i++) sum = sum + i; printf("Sum = %d", sum);
- int a[] = {5, 1, 4, 2}, n = 4, i, j, t; for (i = 0; i < n - 1; i++) for (j = 0; j < n - i - 1; j++) if (a[j] > a[j + 1]) { t = a[j]; a[j] = a[j + 1]; a[j + 1] = t; } for (i = 0; i < n; i++) printf("%d ", a[i]);
- int a, b, c; scanf("%d %d %d", &a, &b, &c); if (a > b && a > c) printf("%d is largest", a); else if (b > c) printf("%d is largest", b); else printf("%d is largest", c);
Frequently asked questions
Is it free?
Yes. Drawing by hand is always free and every account includes free AI credits. AI Flowchart Pro adds unlimited AI generation and every diagram type.
Which symbols does the flowchart use?
The standard ones your lab record needs: oval for Start/Stop, parallelogram for input (scanf) and output (printf), rectangle for processing, diamond for decisions with Yes / No on each branch, and arrows for the flow.
Can it handle nested loops like bubble sort?
Yes. Each loop gets its own counter, condition and update, and the inner loop sits inside the outer one with its own loop-back arrow, so the structure matches the code.
Does it compile or run my C code?
No. The AI reads the program and works out each step on paper, so it is safe to paste unfinished code; it is most reliable for programs up to about 80 lines.
Can I export it?
Yes — PNG, SVG, PDF, PowerPoint with an editable slide, Mermaid code and draw.io. You can also share a live link or present it full screen.
Ready-made examples, explained
- Linear search flowchart, pseudocode and trace table
- Binary search flowchart, pseudocode and trace table
- Bubble sort flowchart, pseudocode and trace table
- Password check flowchart with 3 attempts
- Number guessing game flowchart and pseudocode
- Input validation flowchart (range check)