What is a .CIR file?
CIR is a SPICE circuit description for simulating electronics.
- Did you know
- SPICE, born at Berkeley in 1973, is the foundation of analogue circuit simulation.
- SPICE’s predecessor bore the pointed name CANCER - Computer Analysis of Nonlinear Circuits, Excluding Radiation - a student-era jab at Cold War simulators for radiation-hardened electronics.
- Berkeley released SPICE into the public domain, which is why nearly every commercial circuit simulator is a SPICE derivative.
- What Analyser reads
- Open scientific, medical and engineering files: DICOM scans, NIfTI brain volumes, Garmin FIT/TCX activities, FITS astronomy frames, FASTA/FASTQ sequences, chemistry structures (MOL/SDF/MOL2/CIF/XYZ), Gerber/Excellon PCB data, SPICE netlists, EDF/BDF biosignals, JCAMP-DX spectra, SPSS/Stata/SAS datasets and VTK/ParaView meshes - metadata extracted entirely in-browser.
- Depth of analysis
- .CIR is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .CIR file
- Drag a .CIR file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.