diff --git a/src/common/filetype/c.ts b/src/common/filetype/c.ts
new file mode 100644
index 0000000..b77e887
--- /dev/null
+++ b/src/common/filetype/c.ts
@@ -0,0 +1,154 @@
+import Option, { Some } from '../option.ts';
+import {
+	AbstractFileType,
+	defaultHighlightOptions,
+	FileLang,
+	HighlightingOptions,
+} from './base.ts';
+
+export class CFile extends AbstractFileType {
+	public readonly name: FileLang = FileLang.C;
+	public readonly singleLineComment = Some('//');
+	public readonly multiLineCommentStart: Option<string> = Some('/*');
+	public readonly multiLineCommentEnd: Option<string> = Some('*/');
+	public readonly keywords1 = [
+		'continue',
+		'register',
+		'restrict',
+		'volatile',
+		'default',
+		'typedef',
+		'typedef',
+		'switch',
+		'return',
+		'static',
+		'struct',
+		'extern',
+		'inline',
+		'return',
+		'sizeof',
+		'switch',
+		'break',
+		'const',
+		'while',
+		'break',
+		'union',
+		'class',
+		'union',
+		'auto',
+		'case',
+		'else',
+		'enum',
+		'case',
+		'for',
+		'do',
+		'if',
+	];
+	public readonly keywords2 = [
+		'#include',
+		'unsigned',
+		'uint32_t',
+		'uint64_t',
+		'uint16_t',
+		'#define',
+		'#ifndef',
+		'wchar_t',
+		'int32_t',
+		'int64_t',
+		'int16_t',
+		'uint8_t',
+		'double',
+		'signed',
+		'#endif',
+		'#ifdef',
+		'#error',
+		'#undef',
+		'int8_t',
+		'time_t',
+		'size_t',
+		'float',
+		'#elif',
+		'long',
+		'char',
+		'void',
+		'int',
+		'#if',
+	];
+	public readonly operators = [
+		'>>>=',
+		'**=',
+		'<<=',
+		'>>=',
+		'&&=',
+		'||=',
+		'??=',
+		'===',
+		'!==',
+		'>>>',
+		'<=>',
+		'<<=',
+		'>>=',
+		'+=',
+		'-=',
+		'*=',
+		'/=',
+		'%=',
+		'&=',
+		'^=',
+		'|=',
+		'==',
+		'!=',
+		'>=',
+		'<=',
+		'++',
+		'--',
+		'**',
+		'<<',
+		'>>',
+		'&&',
+		'||',
+		'??',
+		'?.',
+		'++',
+		'--',
+		'==',
+		'!=',
+		'>=',
+		'<=',
+		'&&',
+		'||',
+		'<<',
+		'>>',
+		'+=',
+		'-=',
+		'*=',
+		'/=',
+		'%=',
+		'&=',
+		'|=',
+		'^=',
+		'->',
+		'::',
+		'?',
+		':',
+		'=',
+		'>',
+		'<',
+		'%',
+		'-',
+		'+',
+		'&',
+		'|',
+		'^',
+		'~',
+		'!',
+		'.',
+		',',
+		';',
+	];
+	public readonly hlOptions: HighlightingOptions = {
+		...defaultHighlightOptions,
+		characters: true,
+		hexNumbers: true,
+	};
+}