Remove comments from JSON

Remove JSONC comments and trailing commas so a commented configuration becomes strict JSON.

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ToolJSONC Stripper

Input

Output

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How it works

A character scanner tracks quoted strings and removes line and block comments only outside strings. It drops commas before closing braces or brackets, then parses the result as strict JSON.

Line and block comments cover tsconfig and editor settings.
Trailing-comma removal bridges JSONC input to strict JSON parsers.

Worked example

Server config with inline and block comments

Remove comments from a JSONC file to produce valid JSON

Input

											{
  // Server config
  "host": "localhost",
  "port": 3000 /* default port */
}

Output

												{
  
  "host": "localhost",
  "port": 3000 
}

When to use this

tsconfig.json, .vscode/settings.json, and build-time configuration conversion use JSONC.

Edge cases

http://example.test inside quotes keeps its slashes.
A multi-line block comment is removed without consuming the following token.
A comma inside a string remains while a comma before ] or } is removed.

References

TypeScript tsconfig reference