Opening a LAST File

The LAST file type is primarily associated with Wireshark.

LAST	File extension: LAST
	File type:	log file

What is a LAST file?

LAST files mostly belong to Wireshark. LAST files are Bluetooth HCI snoop log files. They record the data exchanged between a computer and a Bluetooth adapter.
Such logs capture detailed HCI packets including commands, events, and data transmissions. They help in troubleshooting and analyzing Bluetooth communications.
These files are similar to the alternative description btsnoop_hci.log and are managed by Wireshark.

Purpose: To log the low-level Bluetooth activity.

Functionality: They capture and store HCI command and event data for later analysis.

Usage: Open them with Wireshark to inspect packet details.

FilExt.com tip: For more details, visit the official site: Wireshark.

How to open a LAST file

You need a suitable software like Wireshark to open a LAST file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your LAST file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a LAST file directly in the browser:. Just drag the file onto this browser window and drop it.

Online LAST Text Viewer

Choose your .last file to analyze

or drag and drop it here

Online File Viewer

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LAST file format:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The file format can be determined based on the file extension and the signature (the first few characters of a file). File extension, signature and file format must match; otherwise errors will occur when the file is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below you will find our evaluation of the LAST files:

As a file extension, LAST isn't very common and includes various formats for various programs. However, the following two file formats are common:

• 35% of all LAST files start with the bytes btsnoop, which are crucial for this file format. These are binary files, so they do not contain words or text. LAST files are between 16 bytes and 6 MB in size. The file type is relatively new. Certain words are almost always found in the files, such as btsnoop. The file name btsnoop_hci.log.last or btsnoop_hci_phone.log.last is typical for these files. Such files sometimes refer to btsnoop, phone and btsnooz.
• 4% of all LAST files use the same file format, which can be identified by the letters "Initialize engine version: 2017.4.30f1 (0) " at the beginning. The content consists of readable text data, which can be read using a text editor. LAST files can be up to 3 MB in size, but are often around 45 KB - 280 KB. The files contain the following words: Direct3D 11.0, Direct3D, GfxDevice: creating device client; threaded=1, Initialize engine version: 2017.4.30f1 (0), Version and level 11. A common filename is output_log.txt.last. Files like these have the following tags: output.

The remaining 61% of all LAST files are files with no common format, the following 4 formats can be found: ZIP and taskname. The category is game, overlayui, streaming, client, profile or random. You can get all the details of your LAST file by dragging it onto this page or by clicking the button "Choose your .last file to analyze" above.