What is a SESSION file?
A .SESSION file stores the active state, login tokens, or history of a software application. The most common .SESSION files are SQL databases created by the Telethon library for Telegram. These files store user connection data.
However, .SESSION files have multiple possible meanings. They can be JSON or plist formatted analytics logs from Apple iOS, track history states for Serato DJ Pro, terminal session restore scripts for tmux or iTerm2, or a CATIA 4 Session File created by Dassault Systemes.
How to open SESSION files?
Because there are many types of .SESSION files, the correct software depends on the origin of the file. You can open a Telethon file using an SQLite browser. Serato DJ Pro opens music session files. Developers can inspect JSON or text-based .SESSION logs using text editors like Visual Studio Code or Notepad++.
Best practices and troubleshooting
.SESSION files often contain sensitive login tokens and system analytics. Do not share them publicly. If you cannot open your file, viewer.online/session analyzes .SESSION files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Summary
If you are unsure of your file type, we recommend viewer.online/session to identify the actual format of the user's file. Because .SESSION files use the known SQL format, viewer.online/session can safely open and display them online, eliminating compatibility problems.