JSON ↔ Base64
Encode JSON to Base64 or decode Base64 back to JSON
Free online JSON Base64 encoder/decoder. Encode JSON to a Base64 string (useful for JWT payloads, API tokens, config embedding) or decode Base64 back to readable JSON.
Base64 Output will appear here
About JSON ↔ Base64
Base64-encoding JSON is commonly used for embedding configuration in environment variables, URL-safe tokens, JWT custom claims, and API tokens. This tool validates the JSON before encoding and validates the Base64 decodes to valid JSON before displaying.