Home / Tools / Developer / JSON ValidatordeveloperJSON ValidatorCheck JSON for syntax errors and see a clear explanation.JSONValidateWaiting for JSON.Related toolsJSON FormatterPretty-print JSON in the browser. Your data never leaves the page.UUID GeneratorGenerate RFC 4122 version 4 UUIDs locally.Base64 Encoder / DecoderEncode or decode Base64 text without a network round-trip.