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MonoCalc

CRC-64 Hash Calculator

Calculate CRC-64 Hash

Polynomial: 0x000000000000001B
Enter any text to calculate its CRC-64 value
Maximum file size: 5MB
Calculate as you type (not available for file input)
Show result in binary and decimal
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About the tool

🔐 CRC-64 Calculator – Reliable Data Integrity Verification

The CRC-64 Calculator is a powerful tool for generating 64-bit Cyclic Redundancy Check (CRC) values to verify data integrity. Whether you're working with file transfers, data storage, or communications protocols, this tool helps ensure your data remains uncorrupted during transmission or storage.

This guide explains what CRC-64 is, how it works, and walks you through using our free online calculator to generate and verify CRC-64 checksums for your data.

📘 What is CRC-64?

CRC-64 is a type of error-detecting code that generates a 64-bit (8-byte) hash value for a block of data. It's an extension of the CRC family of algorithms, offering stronger error detection capabilities than its 16-bit and 32-bit counterparts. The 64-bit length provides an extremely low probability of undetected errors, making it suitable for applications where data integrity is critical.

CRC-64 works by treating the input data as a polynomial and performing polynomial division by a predefined generator polynomial. The remainder of this division becomes the CRC value, which can later be used to verify if the data has been altered.

🧩 CRC-64 Variants

There are several CRC-64 variants, each using different parameters:

  • CRC-64-ISO: Used in ISO standards, this variant uses polynomial 0x000000000000001B with reflected input/output and initial/final XOR values of 0xFFFFFFFFFFFFFFFF
  • CRC-64-ECMA: Defined by ECMA (European Computer Manufacturers Association), uses polynomial 0x42F0E1EBA9EA3693 without reflection and with initial/final XOR values of 0x0000000000000000
  • CRC-64-WE (WiMAX): Used in WiMAX applications, shares the same polynomial as ECMA but with different initial/final XOR values
  • CRC-64-Jones: Named after its creator, uses polynomial 0xAD93D23594C935A9 with reflected input/output

⚙️ How the CRC-64 Calculator Works

Our CRC-64 Calculator provides a simple interface to:

  1. Enter text or data in various formats (plain text, hexadecimal, or binary)
  2. Upload files to calculate their CRC-64 value
  3. Select a CRC-64 variant based on your requirements
  4. Generate the CRC-64 checksum instantly
  5. View results in hexadecimal, decimal, and binary formats
  6. Copy the result for use in your applications

🧩 Key Features

  • ⚡ Support for multiple CRC-64 variants (ISO, ECMA, WE, Jones)
  • 📝 Input in different formats (text, hex, binary)
  • 📂 File upload capability for calculating CRC-64 of files
  • 🔄 Real-time calculation option
  • 🔢 Display of results in multiple formats
  • 📋 Copy to clipboard functionality
  • 🔐 Client-side processing for privacy and security
  • 📱 Mobile and desktop-friendly interface

🔐 Security and Privacy

Our CRC-64 Calculator runs entirely in your browser, ensuring:

  • No server communication — your data never leaves your device
  • No tracking or logging of calculated checksums
  • Safe processing of potentially sensitive information

🔄 Common Uses for CRC-64

CRC-64 is used in various applications where data integrity is crucial:

  • Data Storage: Verifying file integrity in storage systems and archives
  • Data Transmission: Ensuring data packets are received without corruption
  • Network Protocols: Implementing error detection in communication protocols
  • Cryptographic Applications: As part of data verification processes
  • Database Systems: Checking record integrity
  • Backup Solutions: Verifying successful backup and restoration

🔄 How to Use the CRC-64 Calculator

  1. Select a CRC-64 variant from the dropdown menu (ISO, ECMA, WE, or Jones)
  2. Choose an input format (plain text, hexadecimal, or binary)
  3. Enter your data in the text area or upload a file
  4. View the calculated CRC-64 value in the results section
  5. Toggle additional formats to see the result in decimal and binary
  6. Copy the result using the copy button for use in your applications

📊 Advantages and Limitations

Understanding the strengths and limitations of CRC-64 helps in choosing the right tool for your data integrity needs:

Advantages:

  • Strong Error Detection: The 64-bit length provides excellent detection of burst errors and multiple bit errors
  • Speed: CRC calculations are computationally efficient compared to cryptographic hash functions
  • Standardized: Various CRC-64 variants are standardized and widely implemented
  • Low Resource Requirements: Can be implemented in hardware or software with minimal resources

Limitations:

  • Not for Security: CRC-64 is not cryptographically secure and should not be used for security purposes
  • No Authentication: Does not provide authentication or non-repudiation
  • Variant Compatibility: Different CRC-64 variants are not compatible with each other

🔍 Practical Examples

Here are some practical examples of using CRC-64:

  • File Verification: Calculate the CRC-64 of a file before and after transmission to verify integrity
  • Data Storage: Store CRC-64 values alongside data records to detect corruption
  • Protocol Implementation: Use CRC-64 in custom protocols for error detection
  • Testing: Verify that data processing doesn't alter the original content

By using our CRC-64 Calculator, you can easily generate and verify checksums for your data, ensuring its integrity throughout its lifecycle.

Frequently Asked Questions

  • Is the CRC-64 Hash Calculator free ?

    Yes, CRC-64 Hash Calculator is totally free :)

  • Can i use the CRC-64 Hash Calculator offline ?

    Yes, you can install the webapp as PWA.

  • Is it safe to use CRC-64 Hash Calculator ?

    Yes, any data related to CRC-64 Hash Calculator only stored in your browser(if storage required). You can simply clear browser cache to clear all the stored data. We do not store any data on server.

  • What is CRC-64?

    CRC-64 (Cyclic Redundancy Check) is a type of hash function that generates a 64-bit (8-byte) checksum value used to detect errors in digital data. It provides stronger error detection capabilities than CRC-16 or CRC-32 and is commonly used in data transmission and storage to verify data integrity.

  • What are the different CRC-64 variants?

    There are several CRC-64 variants, each using different polynomials and parameters. Common variants include CRC-64-ISO (used in ISO standards), CRC-64-ECMA (defined by ECMA), CRC-64-WE (used in WiMAX), and CRC-64-Jones (named after its creator). Each variant is optimized for specific use cases and error patterns.

  • How does CRC-64 work?

    CRC-64 works by treating the input data as a polynomial and performing polynomial division by a predefined generator polynomial. The remainder of this division becomes the CRC value. This mathematical property ensures that changes in the input data will likely result in a different CRC value, allowing for error detection.

  • What's the difference between the CRC-64 variants?

    The main differences between CRC-64 variants are the generator polynomial used, the initial value of the CRC register, whether the bits are processed in reverse order (reflected), and whether the final value is XORed with another value. These parameters determine the error-detection properties of the CRC algorithm.

  • When should I use CRC-64 instead of other CRC variants?

    CRC-64 is a good choice when you need stronger error detection capabilities than CRC-16 or CRC-32 can provide. It's particularly useful for large data sets, high-integrity applications, or when the cost of an undetected error is very high. However, it does require more computational resources than smaller CRC variants.

  • Can CRC-64 correct errors?

    No, CRC-64 can only detect errors, not correct them. It can identify when data has been corrupted but cannot determine what the original data was. For error correction, you would need to use more complex algorithms like Reed-Solomon codes or implement a protocol that requests retransmission of corrupted data.