C Beautifier

Paste compact C source and expand it into readable, consistently indented code.

Last updated: May 29, 2026

Indent:Preserve blank linesFinal newline

Messy or Minified C Code

2 lines, 102 B

Beautified C Code

#include <stdio.h>
int main() {
  int total=0;
  for(int i=0;i<3;i++) {
    total+=i;
  }
  printf("%d",total);
  return 0;
}

9 lines, 125 B

Input: 2 linesOutput: 9 linesSize: 125 B

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is C Beautifier?

C Beautifier formats C snippets so functions, loops, conditionals, and return statements are easier to inspect. It is designed for quick browser-side cleanup of copied source, small examples, and compact code blocks. The formatter is intentionally lightweight and focuses on indentation and line breaks rather than compiling or rewriting the program.

How to Use C Beautifier

Paste C source code.

Choose indentation style.

Click Format.

Check the formatted C output.

Copy or download the .c file.

Common Use Cases

Cleaning C examples before adding them to a tutorial.
Reading compact code from an online answer or issue comment.
Making short C snippets easier to review.
Preparing code samples for screenshots or documentation.

Example Input and Output

A compact C function is expanded into readable lines.

Compact C

int add(int a,int b){int total=a+b;return total;}

Beautified C

int add(int a,int b) {
  int total=a+b;
  return total;
}

Privacy

C code is beautified locally in the browser and is not uploaded.

Frequently Asked Questions

Does this compile or validate C?

No. It formats text for readability. Use a C compiler or linter for syntax validation.

Will it change program behavior?

No. It only adjusts whitespace and line breaks.

Does it handle for loops?

Yes. Semicolons inside for loop parentheses are preserved on the same line.

Is my source code uploaded?

No. Beautification runs in your browser.

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