Extract text from telemetry data files (TLM)
To convert TLM telemetry files to another format, you need Mozilla Firefox or other Data software.
To convert other file formats to the "Telemetry Log File" file type, you need software like Mozilla Firefox or a similar tool.
A .TLM file typically stores system telemetry and log data. The format is heavily fragmented across multiple industries. It is widely used by Mozilla Firefox to archive browser performance metrics, by the X-Plane flight simulator to record virtual flight paths, and by Spektrum RC or OpenTX transmitters to log remote-control flight telemetry (like signal strength and battery voltage). Depending on the exact originating software, these files can be structured as proprietary binaries, compressed ZIP archives (such as those used by Trotec JobControl laser software), or plain XML execution logs (used by Domus Laundry machines).
Because the .TLM extension is shared among unrelated applications, opening these files locally is frustrating. A raw telemetry file from an RC transmitter cannot be read by a web browser, and proprietary flight logs usually require dedicated, heavy viewer applications. Users frequently struggle to open these files on standard operating systems because double-clicking a .TLM file will normally result in an error.
To make this data readable and accessible, conversion is usually required. For data analysis, you should convert the file to CSV or JSON to parse sensor values cleanly in spreadsheet software like Microsoft Excel. If the file is actually an archived ZIP or XML database, extracting it to standard text formats allows for quick manual review.
Convert.Guru analyzes your TLM file, detects the exact format, and lets you read the text inside.
Users also converted CEV, HISTORY and GBD files.
If you want to convert TLM file to , you can use Mozilla Firefox or similar software from the "Telemetry Data Logging" category. In the File menu, look for Save As… or Export….
To convert files to TLM, try Mozilla Firefox or another comparable tool in the "Telemetry Data Logging" 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 TLM converter.