HomeCBOR Encode/Decode

CBOR Encode/Decode

Online CBOR encode/decode tool with JSON and CBOR conversion, hex, Base64, C-array output, and container length modes for IoT and embedded protocol debugging.

Paste CBOR data captured from packet tools, IoT devices, or API responses.

Click to insert example data

Decoded Result

Enter CBOR data to decode and view result



Documentation

What is CBOR Codec

This tool converts between JSON and CBOR binary payloads, with multiple byte-format views for compact data debugging.

Key Features

  • Decode CBOR into readable JSON.
  • Encode JSON into CBOR bytes.
  • Convert across hex/base64/C-array formats.
  • Inspect byte viewer and size stats.

Steps

  1. Input CBOR data in Decode tab and choose format.
  2. Review decoded JSON and byte details.
  3. Enter JSON in Encode tab and choose output mode.
  4. Copy encoded result for transport/testing.

FAQ

Why does encoding fail?

Most often due to invalid JSON syntax or unsupported data shapes.

Is CBOR always smaller than JSON?

Not always, but it is often more compact for structured numeric payloads.