Base64 to JSON
Decode Base64 strings back to formatted JSON instantly. Free online Base64 to JSON decoder with validation and beautific
JSON will appear here...
How to Use Base64 to JSON
- Paste your Base64: Paste a Base64 string containing JSON into the input box, or load the sample.
- Click Decode to JSON: Press the Decode to JSON button. The string is decoded, validated and beautified.
- Copy the JSON: Copy the formatted JSON output for inspection or reuse.
About Base64 to JSON
Base64 to JSON Decoder decodes Base64 strings back into formatted, readable JSON.
- Auto-Beautify: Decoded JSON is validated and formatted with indentation automatically.
- Error Detection: Invalid Base64 or non-JSON content shows a clear error message.
- Private Processing: Decoding runs entirely in your browser.
Ideal for debugging encoded API payloads, inspecting tokens and reading encoded configs.
Frequently Asked Questions
How does Base64 to JSON decoding work?
The Base64 string is decoded back to text and then validated as JSON. Valid results are beautified with clean indentation automatically.
What if my Base64 has invalid characters?
The tool shows a clear error message so you can fix the input. Whitespace is trimmed automatically before decoding.
Is decoding done locally?
Yes — decoding happens entirely in your browser, so sensitive payloads never leave your device.