BCS Online Decoder

Binary Canonical Serialization Decoder

Convert BCS format back to readable data

Input Format

Encoded Input

Decode As Type

How to Use BCS Online Decoder

1. Select Input Format

Choose the format of your encoded BCS data:

•Hexadecimal: Standard hex format (e.g., 0a1b2c)
•Base64: Base64 encoded string
•Base58: Base58 encoded string

2. Choose Decode Type

Select what type the encoded data represents:

•Basic Types: string, bool, u8-u256, address
•Decimal Types: FixedPoint32/64, BigDecimal
•Custom Types: vectors, structs, options

3. Decode Custom Types

For complex structures, define the type schema:

Vector Example:

// Type Definition

vector<u64>

// Decoded Output

[1, 2, 3, 4, 5]

Struct Example:

// Type Definition

struct ABC { a: u64, b: string }

// Decoded Output

{"a": 100, "b": "hello"}

Option Example:

// Type Definition

option<u64>

// Decoded Output (Some)

123

// Decoded Output (None)

null

4. Decoding Tips

•You must know the original type to decode correctly
•Hex strings can include or omit the 0x prefix
•Large numbers (u64, u128, u256) are returned as strings
•Complex types are displayed as formatted JSON

About BCS Decoding

Binary Canonical Serialization (BCS) is the serialization format used in Move-based blockchains. This decoder converts BCS binary data back into readable values.