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How to Use Free Online LZ4 Decompressor - Step by Step Guide

Step 1

Upload or Paste LZ4 Data

Start by providing the LZ4 compressed data you want to decompress. LZ4 is an extremely fast compression algorithm widely used in gaming, databases, and real-time applications. Perfect for decompressing JSON, XML, log files, and more:

•
Upload .lz4 file: Click "Upload .lz4 File" to select a compressed file from your computer
•
Paste base64: Paste base64-encoded LZ4 data directly into the input area
•
Try sample data: Click "Sample" to see how decompression works with example data

Example: Base64 Encoded LZ4 Input

Here's what compressed LZ4 data looks like (base64 encoded):

BCJNGGRwBQBCAJNhYW1lIjogIkN5YmVyIEFy
ZW5hIDIwNzciLCAicGxheWVycyI6IFt7ImlkIg
ogIlBMQVlFUi0wMDEiLCAidXNlcm5hbWUiOi
AiU2hhZG93TmluamEiLCAic2NvcmUiOiA5OD
UwLCAibGV2ZWwiOiA0N31dfQA=
Step 2

Ultra-Fast Decompression

The decompression happens instantly! As soon as you upload or paste LZ4 data, the tool automatically decompresses it, similar to how our GZIP, ZLIB, and Brotli decompression tools work:

•
Decompresses your data: Uses ultra-fast LZ4 algorithm for instant decompression
•
Validates data format: Ensures the data is valid LZ4 format before decompression
•
Shows original content: Displays the decompressed data in an easy-to-read format

Example: Decompressed Output

After decompression, you'll see the original JSON data:

{
  "game": "Cyber Arena 2077",
  "players": [
    {
      "id": "PLAYER-001",
      "username": "ShadowNinja",
      "score": 9850,
      "level": 47
    }
  ]
}
Step 3

Download or Copy Decompressed Data

Get your decompressed data ready for use! Multiple options to work with your extracted content:

•
Copy to clipboard: One-click copying for immediate use in your projects
•
Download as text file: Save the decompressed content to your computer
•
View in editor: Read and review the content directly in the output panel

Frequently Asked Questions

How do I decompress an LZ4 file?

Simply upload your .lz4 file using the "Upload .lz4 File" button, or paste base64-encoded LZ4 data into the input area. The tool will automatically decompress it and show the original content instantly.

Is my data secure when decompressing?

Yes! All decompression happens in your browser. Your data never leaves your computer or gets uploaded to any server. Complete privacy and security for your sensitive files.

What file formats does LZ4 decompressor support?

The tool supports .lz4 files and base64-encoded LZ4 data. You can decompress any LZ4 compressed content including text files, JSON, XML, logs, configuration files, and more.

How do I compress files back to LZ4?

Use our LZ4 compression tool to compress your files. The process is reversible and you can compress and decompress as many times as needed.

Why is LZ4 decompression so fast?

LZ4 is specifically designed for speed. Its decompression is 2-3x faster than GZIP, making it perfect for real-time applications like gaming, live streaming, and database operations where quick access to data is critical.

Can I decompress LZ4 files from databases like MySQL or PostgreSQL?

Yes! Many databases use LZ4 compression for data storage. You can extract LZ4 compressed data from databases and decompress it using this tool to view the original content.

What happens if I upload an invalid LZ4 file?

The tool will validate the file format and show an error message if the data is not valid LZ4 format. Make sure your file was compressed using LZ4 compression algorithm.

Can I decompress game assets and log files compressed with LZ4?

Absolutely! LZ4 is commonly used in game engines and logging systems. Upload your .lz4 game assets or log files, and the tool will instantly extract the original content for viewing or editing.

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