.JSONLZ4 File Recovery

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .JSONLZ4 file recovery guide for Windows, MacOS, Android and IOS in 2024.

JSONLZ4 File Recovery

What is a .JSONLZ4 file?

Compressed bookmark backup file created and used by Firefox, a web browser; contains data describing all of the bookmarks used by the Firefox user profile; similar to the .JSON file used by Firefox.

What Are Common Causes of ".JSONLZ4" Files Lost or Failure?

There are several common causes of ".JSONLZ4" file loss or failure:

  1. Accidental deletion: One of the most common causes is accidentally deleting the ".JSONLZ4" file. This can happen when you are cleaning up your computer or mistakenly deleting the wrong file.
  2. File system errors: Corruption or errors in the file system can lead to the loss or failure of ".JSONLZ4" files. This can occur due to improper shutdowns, power outages, or hardware issues.
  3. Software or application issues: Errors or bugs in the software or application that handles the ".JSONLZ4" files can cause them to fail or become inaccessible. This can happen during the compression or decompression process.
  4. Virus or malware attacks: Malicious software can infect and damage files on your computer, including ".JSONLZ4" files. Viruses or malware can corrupt or delete files, making them unusable.
  5. Hardware failure: Issues with the storage device where the ".JSONLZ4" files are stored, such as a hard drive failure or physical damage, can result in the loss or failure of the files.
  6. Operating system updates or upgrades: Sometimes, updating or upgrading your operating system can cause compatibility issues with certain files, including ".JSONLZ4" files. This can lead to their loss or failure.
  7. Human error: Mistakes made by users, such as accidentally overwriting or moving ".JSONLZ4" files, can cause their loss or failure.

It's important to regularly back up your ".JSONLZ4" files to prevent data loss and use reliable data recovery tools or services if you encounter any issues.

How to recover lost ".JSONLZ4" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".JSONLZ4" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".JSONLZ4" file is always to create it once more.

Use programs for recovering ".JSONLZ4" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".JSONLZ4" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

The tool recovers data from any devices, regardless of the cause of data loss.

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software
  3. Double-click on the disk from which you need to recover ".JSONLZ4" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type
  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored
  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan
  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery
  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".JSONLZ4" extension?

Looking for how to open a stereo compressed Firefox Bookmarks Backup File image file file?

Programs that open ".JSONLZ4" files

Mozilla Firefox Mozilla Firefox
Mozilla Firefox Mozilla Firefox
Mozilla Firefox Mozilla Firefox

Additional Information

  • File type: Compressed Firefox Bookmarks Backup File

  • File extension: .JSONLZ4

  • Developer: N/A

  • Category: Compressed Files

  • Format: N/A


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 15:14 #
    Leave a comment if you have any questions about Recovering lost .JSONLZ4 files after deleting, cleaning or formatting!
Post comment
Leave a reply
Your email address will not be published. Required fields are marked *

Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What is a .JSONLZ4 file format and what is its purpose?

    The .JSONLZ4 file format is a compressed file format used for storing JSON data. It is created by compressing JSON data using the LZ4 compression algorithm.

    The purpose of the .JSONLZ4 format is to reduce the file size of JSON data, making it more efficient to store and transmit. JSON (JavaScript Object Notation) is a popular data interchange format used for representing structured data. However, JSON files can be quite large, especially when dealing with large datasets.

    By compressing JSON data using the LZ4 algorithm, the .JSONLZ4 format significantly reduces the file size while still preserving the original data. This makes it easier to store and transfer JSON data, especially in scenarios where bandwidth or storage space is limited.

    To use .JSONLZ4 files, they need to be decompressed using a compatible tool or library that supports the LZ4 compression algorithm. Once decompressed, the data can be accessed and manipulated in its original JSON format.

  • How can I open a .JSONLZ4 file and access its contents?

    To open and access the contents of a .JSONLZ4 file, you need to perform the following steps:

    Install the required libraries: First, make sure you have the necessary libraries installed. You'll need the `lz4` and `json` libraries. You can install them using the following commands:

    • For lz4: `pip install lz4`
    • For json: No installation required as it is a built-in library.

    Import the required libraries: In your Python script, import the necessary libraries using the following lines:


    import lz4.frame as lz4frame

    import json


    Read and decompress the file: Open the .JSONLZ4 file in binary mode and read its contents. Then, decompress the data using the `lz4frame.decompress()` function. Here's an example:


    with open('your_file.jsonlz4', 'rb') as file:

    compressed_data = file.read()

    decompressed_data = lz4frame.decompress(compressed_data)


    Access the JSON data: Once the data is decompressed, you can access its contents as JSON. Use the `json.loads()` function to parse the data into a Python object. Here's an example:


    json_data = json.loads(decompressed_data)


    Now, you can access the contents of the .JSONLZ4 file through the `json_data` object, which will contain the parsed JSON.

    Note: The .JSONLZ4 file format is often used for storing Firefox browser bookmarks, history, or session data. Keep in mind that the structure of the JSON data may vary depending on the specific use case, so you'll need to handle the data accordingly.

  • Are there any specific tools or software required to open and extract data from a .JSONLZ4 file?

    Yes, to open and extract data from a .JSONLZ4 file, you would need specific tools or software that can handle this file format. Here are a few options:

    1. Mozilla Firefox: .JSONLZ4 files are typically associated with Firefox browser backups. You can open and extract data from a .JSONLZ4 file using Firefox itself. Simply rename the file extension from .JSONLZ4 to .JSON and open it with Firefox. You can then save the file as a .JSON file and access the extracted data.
    2. lz4json: lz4json is a command-line tool specifically designed to decompress and extract data from .JSONLZ4 files. It can be installed on various operating systems and provides a simple way to convert .JSONLZ4 files to .JSON format.
    3. Python libraries: If you are comfortable with programming, you can use Python libraries like lz4 and json to open and extract data from .JSONLZ4 files. The lz4 library can decompress the file, and then you can use the json library to parse the extracted data.

    These are just a few examples, and there may be other tools or software available depending on your specific requirements and operating system.

Hello! This is AI-based Hetman Software virtual assistant, and it will answer any of your questions right away.
Start Chat