Extract text from additional data files (EXTRA)
To convert EXTRA data files to another format, you need LINE or other Data software.
To convert other file formats to the "Application Data & Mods" file type, you need software like LINE or a similar tool.
The .extra file format serves multiple distinct purposes depending on the software that created it. Most commonly, it is a chat history backup generated by the messaging app LINE. Alternatively, it functions as a character mod package for the Illusion Koikatsu Party video game. In software development environments, it is used as asset metadata for Snapchat Lens Studio or as crash report data for Mozilla Firefox, where it is structured internally as standard JSON.
The major disadvantage of .extra files is their lack of standardization. The extension provides no immediate clue about the file's internal data. A LINE backup is proprietary, securely locked to the application ecosystem, and completely unreadable by standard text editors. This creates severe vendor lock-in for users trying to export their chats. Game mod packages are equally restricted to their specific game engine. Conversely, Lens Studio and crash report files are simple plain text, but the obscure extension prevents operating systems and web browsers from opening them automatically without manual intervention.
Users frequently need to extract or read the data inside these files outside of their native applications. For developers and technical users dealing with crash reports or Lens metadata, the best conversion target is JSON or TXT for web use and code editing. For users attempting to archive LINE chat histories, extracting the underlying text data into CSV or PDF/A is ideal for long-term archiving, though native app restrictions make direct file conversion difficult. Drag and drop your file to analyze and convert it - free, online, and without installing software.
Convert.Guru analyzes your EXTRA file, detects the exact format, and lets you read the text inside.
Users also converted VBB, MSV and COT files.
If you want to convert EXTRA file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use LINE or similar software from the "App Backup & Game Mods" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to EXTRA, try LINE or another comparable tool in the "App Backup & Game Mods" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our EXTRA converter.