NGSPICE File — Open & Convert .cir Online
What Is a .cir File?
NGSPICE (.cir) is a scientific file format. ngspice Circuit File Created by ngspice, this format is essential for researchers and academics.
How to Open .cir Files
Upload your .cir file to OpenAnyFile and instantly analyze and visualize it in your browser. No software installation required. Works on Windows, macOS, Linux, iPhone, and Android.
Everything About NGSPICE Files
Popular NGSPICE Conversions
Frequently Asked Questions
What is a .cir file?
A .cir file is a scientific format called NGSPICE. ngspice Circuit File
How do I open a .cir file without installing software?
Upload your .cir file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .cir files?
.cir files are typically created by ngspice.
Can I convert .cir to another format?
Yes. OpenAnyFile converts .cir to TXT.
Is it safe to open .cir files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .cir on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.