Free Online Tool

Parity Bit

Add parity bits for simple error detection.

Parity Bit Calculator

Add or check parity bits for simple error detection in binary data

Operation Mode

Input Type

Parity Type

Parity Position

Bit Grouping

Simulate parity error

Enter Text

Characters: 0Blocks: 0

Binary with Parity

Example Values

Click any example to try it

Single character

Hello

Simple word

Test123

Mixed alphanumeric

How to Use Parity Bit

Choose Add Parity, Text input, Even parity, and End position.
Leave grouping at 8 so every UTF-16 character code is shown as an eight-bit byte in these ASCII examples.
The component appends 0 or 1 so each nine-bit block has an even count of ones.
Use Check Parity to validate blocks and report mismatches.

A parity bit detects any odd number of flipped bits in a block but cannot identify or correct the bad bit.

Even parity appended to one byte:

Output:

010000010

Even parity appended to two bytes:

Output:

010010000 011010010

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

No registration, no limits, completely free to use.