Free Online Tool

Hamming Code

Generate error-detecting and correcting Hamming codes.

Hamming Code (7,4)

Error detection and correction using Hamming codes

Operation Mode

Input Type

Use (8,4) Extended

Enter Binary Data (4-bit chunks)

Encoded Output

Example Values

Click any example to try it

1011

4-bit data → 7-bit Hamming

1100

Another 4-bit example

11010110

8-bit data (2 blocks)

How to Use Hamming Code

Choose Binary input and Encode mode.
Enter bits; the component processes them in four-bit chunks and pads the last chunk on the right.
Leave Extended Hamming off for the 7-bit outputs shown below.
Switch to Decode to extract data bits and correct a reported single-bit error.

Hamming(7,4) places three even-parity bits around four data bits. A three-bit syndrome identifies one erroneous bit position.

One four-bit block:

1010

Output:

1010 → 1011010

Two four-bit blocks:

11110000

Output:

1111 → 1111111 0000 → 0000000

All processing happens in your browser. No data is sent to servers.

No registration, no limits, completely free to use.