C Formatter
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Issue Description
Hint: Describe what you want to build or paste your code, select target language, and click Generate.
How It Works
- Step 1: Paste C code with formatting issues—inconsistent indentation, missing spaces around operators, or non-standard brace placement.
- Step 2: The formatter tokenizes C using lexical analysis, identifying keywords, preprocessor directives, function declarations, and control structures.
- Step 3: Applies formatting rules including consistent indentation, spaces after keywords (if, while, for), proper brace alignment, and pointer declaration spacing (int *ptr).
- Step 4: Returns formatted C code compatible with clang-format and industry standards, ready for embedded systems, kernel development, or systems programming projects.
C Formatting Examples
Example: C Code Formatting
#include<stdio.h>
int main(){int x=10;if(x>5){printf("Greater");} else{printf("Lesser");}return 0;}#include <stdio.h>
int main()
{
int x = 10;
if (x > 5)
{
printf("Greater");
}
else
{
printf("Lesser");
}
return 0;
}Key Changes:
The formatter applies Allman-style bracing with opening braces on new lines, improving readability for C codebases. Spaces are added around operators (x = 10, x > 5) and after keywords (if, else). The #include directive gains proper spacing. Indentation uses consistent 4 spaces per level. Blank lines separate logical blocks (variable declarations from control flow). This formatting matches common C style guides used in Linux kernel development, embedded systems, and systems programming, ensuring code passes automated linters and maintains team consistency.
Frequently Asked Questions
Can I customize the indentation style and brace placement?
The formatter currently applies a default Allman-style brace layout with 2-space indentation. Advanced configuration (K&R, GNU styles, tab width adjustment) is planned for future releases. For now, the output follows industry-standard conventions compatible with most C style guides and linters like clang-format.
Is my C code sent to a server during formatting?
No. All tokenization and reformatting run client-side via JavaScript parsers. Your C source code—whether proprietary firmware, confidential algorithms, or internal libraries—stays in your browser. Zero network transmission occurs, eliminating supply chain attack vectors from third-party formatting services.
What C syntax features are unsupported or problematic?
The formatter handles standard C89/C99/C11/C17 syntax. Complex preprocessor macros with token pasting (##) or stringification (#) may format unpredictably. Inline assembly blocks (__asm__) are preserved but not reformatted. Files exceeding 5MB may hit browser memory limits—split large headers or minimize before formatting.