Calculate CRC16 Hash – Free Online CRC16 Checksum Generator

Compute CRC-16 (CCITT) checksum from text in your browser. Client-side only. For error detection, not security.

What is the CRC16 Hash tool?

This tool computes the CRC-16 (CCITT) checksum of any text. CRC-16 is used for error detection in data transmission, storage, and protocols. It is not cryptographic. All processing runs in your browser.

Key features

• Client-side — No server uploads.
• UTF-8 input — Text is encoded as UTF-8; CRC-16 is computed over the bytes.
• Instant — Result updates as you type.
• Copy — One-click copy (hex output).

How to use

1. Open Calculate CRC16 Hash.
2. Paste or type your text.
3. Copy the CRC-16 checksum (hex).

When to use CRC16

• Serial protocols — Many use CRC-16 for error detection.
• File integrity (non-security) — When a format specifies CRC-16.
• Systems that require CRC-16. For security use SHA-256.

Frequently asked questions

What is CRC16 used for?

CRC-16 is a checksum for error detection in data transmission, storage, and protocols. It is not cryptographic.

What input does the tool accept?

Any text. Input is encoded as UTF-8 and the CRC-16 (CCITT) is computed over the bytes.

Is CRC16 secure?

No. CRC is for error detection, not security. Do not use for passwords or secrets.

Is my data sent to a server?

No. The checksum is computed in your browser.

When should I use CRC16?

For serial protocols, file integrity in non-security contexts, or when a system specifies CRC-16.

Why does my checksum differ?

CRC depends on the exact bytes. Ensure the same encoding (UTF-8) and no extra characters.

Try the tool

Use Calculate CRC16 Hash. See CRC32, Hash Generator, or All Hashes.

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