.CC file extension
To open .CC files on Windows, right-click the .cc file → Open with → choose a code editor or IDE (a plain-text editor works if you just need to read it).
To open a .cc file, use a programming text editor or an IDE (for example on Windows/macOS/Linux). If you need to run it, compile it as C++ (for example with g++), rather than trying to “open” it like a document.
Last updated: June 11, 2026 · Reviewed by Julian Stricker
What “reviewed” means on this page
- Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
- Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
- Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
- Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
- Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.
Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.
Open on your device
Choose your operating system for a dedicated step-by-step opening guide.
How to open .CC files
Use these platform-specific instructions to open .CC files safely.
Windows
- Right-click the .cc file → Open with → choose a code editor or IDE (a plain-text editor works if you just need to read it).
- If you need to build it, use a C++ toolchain and compile it as C++ (for example with g++ in a developer command prompt or terminal).
Mac
- Control-click the .cc file → Open With → choose a code editor/IDE (any plain-text editor can display it).
- To run the program, compile it with a C++ compiler (for example g++) from Terminal.
Linux
- Open the .cc file in a text editor/IDE from your file manager (Open With…); many desktops recognize it as C++ source (text/x-c++src).
- To compile, run g++ on the file from a terminal (g++ treats .cc as C++ source by default).
iOS
- iOS can usually display .cc as text in a code/text editor app; for compiling/building, transfer the file to a desktop system with a C++ toolchain.
Android
- Android can usually display .cc as text in a code/text editor app; for compiling/building, transfer the file to a desktop system with a C++ toolchain.
Security notes
- .cc files are plain text, but they can still be risky if you compile and run code you did not review—treat untrusted source code like an untrusted program.
- Be cautious with build scripts and compiler flags from third parties; the danger is usually in what you execute during the build/run process, not in “opening” the text.
- If you host .cc files on a web server, configure the server’s Content-Type mappings intentionally (for example in Apache via mod_mime) to avoid unexpected handling by clients.
Before you run downloaded code
These files usually need a runtime (Python, Node, Java, …). They are not classic “file viruses,” but untrusted code can still do serious harm if you execute it. Prefer official packages, verify publishers, and scan archives or sketchy downloads when you are unsure.
Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.
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We may earn a commission when you use affiliate links. This supports our free file extension guides.
Can't open this file?
These are the most common causes and fixes when .CC files fail to open.
Common reasons
- It opens in the wrong app (or shows as an unknown file type)
- Compilation fails or the compiler treats it as the wrong language
- Web server serves .cc with an unexpected Content-Type
Fix steps
- Use “Open with…” and pick a text editor or IDE.
- On Linux, ensure your environment uses the shared MIME database; .cc is commonly mapped to text/x-c++src there.
OS-specific troubleshooting
What is a .CC file?
.cc is a conventional filename suffix for C++ source code. Tools like GCC treat .cc as C++ input and will compile it accordingly. On many systems it is associated with the (non-IANA) MIME type text/x-c++src via the shared MIME database.
Background
In practice, .cc files are plain-text C++ source files used in software projects. Because they are text, they can be viewed and edited in many editors, and they work well with version control systems (diffs, merges, code review).
Common MIME types: text/x-c++src
Further reading
Authoritative resources for more details on the .CC format.
- Invoking G++ (Using the GNU Compiler Collection) — suffixes and C++ compilation
- Shared MIME-info Database specification (freedesktop.org) — MIME globs like text/x-c++src
- Apache HTTP Server 2.4 — mod_mime (extension-to-Content-Type mapping)
- IANA Media Types registry (to verify registered vs. unregistered types)
Common .CC issues
It opens in the wrong app (or shows as an unknown file type)
File associations may not be set up, or your desktop environment may not recognize the extension/MIME mapping.
- Use “Open with…” and pick a text editor or IDE.
- On Linux, ensure your environment uses the shared MIME database; .cc is commonly mapped to text/x-c++src there.
Compilation fails or the compiler treats it as the wrong language
The build command or toolchain may be misconfigured, or you may be using the wrong compiler driver.
- Compile using a C++ compiler driver such as g++ (GCC documents .cc as a C++ source suffix).
- Check that the file really contains C++ (not C, C#, or something else) and that required headers/libraries are installed.
Web server serves .cc with an unexpected Content-Type
Servers often map extensions to Content-Type via configuration (for example Apache’s mime.types/TypesConfig). If misconfigured, browsers may download it or display it oddly.
- Review your server’s extension-to-type mapping (for Apache, check mod_mime configuration and mime.types).
- Prefer serving source files as a text type if your goal is safe viewing rather than execution/download behavior.
FAQ
Is a .cc file a “CC Document File”?
Most commonly, .cc refers to a C++ source code file. If you received it expecting a document, confirm the sender and context—don’t assume it is a word-processing document.
Can I open a .cc file in a normal text editor?
Yes. .cc is plain text source code, so any text editor can open it. An IDE/code editor will add syntax highlighting and project/build features.
What MIME type should .cc use?
Many systems use text/x-c++src for C++ source, but it is not an IANA-registered standard media type. Servers and desktops may differ based on their MIME databases and configuration.
Can I convert a .cc file by renaming it?
No. Renaming only changes the extension; it does not convert the content. If you need a different format (for example, HTML for viewing), use an export or code-to-documentation tool.
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