LZ77 Calculator
A free online tool to simulate and analyze LZ77 compression, helping developers and students understand pattern matching and efficiency in data encoding.

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About This Tool
The LZ77 Calculator is an advanced online tool designed to simulate the core operations of the LZ77 compression algorithm. Users can input raw data strings to explore how the algorithm identifies repeated patterns, calculates compression ratios, and generates tokenized output similar to standard LZ77 encoding. This educational and practical tool provides a clear visualization of the sliding window mechanism and pattern matching process, making complex concepts accessible for learners and professionals alike.
By analyzing your data with this calculator, you gain insights into compression efficiency, identify redundant data sequences, and understand how LZ77 reduces data size. The tool features a range of outputs including detailed token lists, pattern detection, and optional graphical visualizations. It supports quick exports of results in JSON format, enabling integration with other systems or further analysis.
Whether you're a developer optimizing compression algorithms, a student studying data encoding, or an educator preparing lessons, this calculator offers a robust platform for exploration and analysis. It operates entirely client-side for fast responses and user privacy. Ideal for use in software development, academic projects, or debugging compression techniques.
How to Use
1. Paste your raw data string into the input area.
2. Click the 'Calculate' button to run the compression simulation.
3. Review the generated compression ratio, pattern detections, and token list.
4. Use visualization tools for better understanding or export results for offline analysis.
5. Click 'Reset' to clear input and start a new session.

FAQs/Additional Resources
Find Quick Answers
What is the LZ77 compression algorithm?
Can I use this tool with binary files?
How accurate are the compression ratio estimates?
Is this tool suitable for educational use?
Can I export the results?
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