CAPNP File — Open & Convert .capnp Online
What Is a .capnp File?
CAPNP (.capnp) is a data file format. Cap'n Proto Schema Created by Sandstorm, this format is essential for developers, analysts, and data engineers.
How to Open .capnp Files
Upload your .capnp file to OpenAnyFile and instantly parse and transform it in your browser. No software installation required. Works on Windows, macOS, Linux, iPhone, and Android.
Everything About CAPNP Files
Popular CAPNP Conversions
Frequently Asked Questions
What is a .capnp file?
A .capnp file is a data format called CAPNP. Cap'n Proto Schema
How do I open a .capnp file without installing software?
Upload your .capnp file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .capnp files?
.capnp files are typically created by Sandstorm.
Can I convert .capnp to another format?
Yes. OpenAnyFile converts .capnp to CSV, JSON, XML.
Is it safe to open .capnp files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .capnp on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.