Does it support JSONC or trailing commas?

Strict JSON only, matching JSON.parse, so what validates here validates in your runtime.

Never. The parser is the browser built in JSON engine.

Developer Utilities

JSON formatter and validator

Paste any JSON document to pretty print it with two or four space indentation, minify it for production, sort keys alphabetically, or jump straight to the line and column of a syntax error.

Frequently asked questions

Does it support JSONC or trailing commas?: Strict JSON only, matching JSON.parse, so what validates here validates in your runtime.
Is my data uploaded?: Never. The parser is the browser built in JSON engine.