Click the "Select File" button above, and choose your AT2 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert AT2 to another file type
To convert AT2 Data files to another format, you need SeismoSignal or other Data software.
Convert a file to AT2
To convert other file formats to the "Seismic Time Series File" file type, you need software like SeismoSignal or a similar tool.
About AT2 files
The .AT2 file extension is predominantly used to store Strong Motion Acceleration Time History data. It is the standard format distributed by the PEER (Pacific Earthquake Engineering Research Center) NGA Strong Motion Database to record and analyze seismic events. Secondary, less common uses for the .AT2 extension include Austrian address data exchange for Österreichische Post AG, standard accounting extracts for SAP Concur, and Canadian corporate tax returns generated by Intuit ProFile.
The primary disadvantage of the .AT2 format is its highly specialized and fragmented nature. The seismic variant is effectively plain text, but it uses rigid, unstructured formatting with multiple header lines that break standard spreadsheet imports. Opening and plotting this data directly requires specialized, expensive engineering software like SeismoSignal. Conversely, the tax and banking variants of .AT2 are proprietary, locked ecosystems that cannot be opened without active, expensive software subscriptions. These files are not supported by web browsers and are notoriously difficult to share with non-engineers or external accountants.
To make this data accessible, conversion is necessary. For data science and analysis in Microsoft Excel, Python, or MATLAB, convert the .AT2 to a standardized CSV or TXT file. For archiving or sharing unalterable records with stakeholders, convert to PDF.
Convert.Guru analyzes your AT2 file, detects the exact format, and lets you read the text inside.
If you want to convert AT2 file to MP3, WAV, AAC, FLAC, OGG, WMA, M4A, AIFF, OPUS, ALAC, APE or WV, you can use SeismoSignal or similar software from the "Seismic Acceleration Data Storage" category. In the File menu, look for Save As… or Export….
To convert MIDI, AAC, TTA, AU, WV, DTS, MID, FLAC, RA, MP3, PCM or WAV files to AT2, try SeismoSignal or another comparable tool in the "Seismic Acceleration Data Storage" category.
The AT2 Converter Story
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 AT2 converter.