CBOR ↔ JSON Converter / Viewer
Options
Status
Idle
Bytes
0
Detected / last mode
Quick notes
Supported flows
- Decode Base64 CBOR to JSON
- Decode hex CBOR to JSON
- Encode JSON to CBOR and download it as a file
What is CBOR ↔ JSON Converter / Viewer?
This tool converts JSON to CBOR and decodes CBOR back to JSON.
It is useful for WebAuthn, passkeys, IoT, compact binary APIs, debugging binary payloads, and interoperability testing.
How to use CBOR ↔ JSON Converter / Viewer
- Paste JSON and click Encode to convert it into CBOR.
- Paste Base64 or hex CBOR and click Decode to convert it into JSON.
- Use Auto-detect if you are not sure whether the input is JSON, Base64, or hex.
- Upload or download .cbor files when needed.
Tips
- CBOR is a binary format, so Base64 and hex are the most convenient text representations.
- This tool is especially useful when debugging WebAuthn and passkey payloads.
- Hex output helps compare binary payloads byte by byte.
- If decoding fails, verify whether the input is really CBOR and whether the selected format is correct.
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CBOR ↔ JSON FAQ
Can this tool decode CBOR to JSON?
Yes. It supports decoding CBOR from Base64 or hex into formatted JSON.
Can it encode JSON to CBOR?
Yes. It encodes JSON into CBOR and returns Base64 and hex output.
Does it support file upload and download?
Yes. You can upload a .cbor file and download encoded CBOR as a .cbor file.
Is my data stored?
No. The tool only processes the submitted content for conversion.