Click the "Select File" button above, and choose your ASY file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert ASY to another file type
To convert ASY Symbol files to another format, you need LTspice or other Data software.
Convert a file to ASY
To convert other file formats to the "Hardware Logic & Assay Data" file type, you need software like LTspice or a similar tool.
About ASY files
The .ASY file format is heavily fragmented across completely unrelated industries. Its most common use is as a Schematic Component Symbol in LTspice, a widely used electronic circuit simulator developed by Analog Devices. In this engineering context, the file defines the visual representation and pinout of a circuit component (like a resistor, capacitor, or custom IC) meant to be placed on an ASC schematic canvas. Another major slice of the .ASY file pie comes from the clinical and medical laboratory sector. Here, it functions as an Assay Protocol or diagnostic data file. These are used by expensive, closed-ecosystem machines such as the Eppendorf epRealplex qPCR cyclers, Roche Cobas analyzers, or specific hardware suites from Siemens Healthineers and DiaSorin. Additionally, the extension is sometimes used as a script file for the Asymptote vector graphics language, or as a 3D virtual product assembly file in Lattice VPS or MSC ADAMS. The main disadvantage of the .ASY format is this extreme fragmentation. If you receive an .ASY file without context, it is impossible to immediately know what software requires it. Laboratory assay files are notoriously locked down; they are proprietary, binary blobs designed to strictly prevent tampering, meaning they require the exact companion software from the manufacturer to open. You cannot view them natively in Windows or macOS. Meanwhile, LTspice files are plain text, but their proprietary coordinate system only renders correctly within the LTspice engine. If you need to share a circuit component drawing with a client, converting the schematic symbol to a standard PDF or PNG is highly recommended. For Asymptote graphics scripts, you must compile the code into EPS or SVG for universal vector compatibility. Clinical laboratory data files cannot be blindly converted; instead, technicians must export the test results from the native laboratory software directly to CSV or XLSX. Because the .ASY format is so fiercely specific and heavily tied to physical hardware, standard online converters predictably fail to process it. Only the original software or lab hardware can properly read or export the assay data. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your ASY file, detects the exact format, and lets you read the text inside.
If you want to convert ASY file to DWG, DXF, DGN, RVT, RFA, SKP, 3DM, STEP, IGES, SAT, X_T or X_B, you can use LTspice or similar software from the "Component Symbol or Assay Protocol" category. In the File menu, look for Save As… or Export….
To convert SLDASM, DGN, PRT, IAM, X_B, CATPRODUCT, SLDPRT, RVT, ASM, DWG, CATPART or DXF files to ASY, try LTspice or another comparable tool in the "Component Symbol or Assay Protocol" category.
The ASY 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 ASY converter.