Base64 to JSON
Paste Base64-encoded text to decode and format as JSON.
Try it with this example
Paste a Base64 string containing JSON. Decode and format in one step.
What is this tool?
APIs and logs sometimes deliver JSON that has been Base64-encoded. Decoding and formatting that manually is tedious. The Base64 to JSON tool does both in one step: paste the Base64 string, decode it, parse the JSON, and pretty-print the result. Get readable JSON from an encoded payload without running two separate tools. All processing runs in your browser. Your data stays on your device.
Base64 encoding turns binary data into ASCII text. When JSON is Base64-encoded, you get a long string of letters, digits, plus, and slash. Decoding yields the original JSON text. This tool then parses it and formats it with indentation and line breaks. If the decoded content isn't valid JSON, you'll see an error—the Base64 part may have decoded correctly, but the inner content might be corrupted or not JSON at all.
Use it when debugging API responses that return Base64-encoded JSON. When inspecting logs that contain encoded payloads. When a webhook or integration sends data in this format and you need to see the structure. One paste, one click, readable JSON. For the reverse—JSON to Base64—use a Base64 encoder; for JSON to CSV to Base64, use the JSON to Base64 CSV tool.
All decoding and parsing is client-side. No server round-trip, no storage. Paste, decode, view. For very large payloads, browser memory may be a limit; for typical API responses and log lines, it's fast. Bookmark it for encoded JSON inspection.
Handy for API debugging and log analysis.