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
- Open Calculate CRC16 Hash.
- Paste or type your text.
- 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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