How to open .PAS files on Linux
To open .PAS files on Linux, open the .pas file in a code editor from your file manager (Open With → a text/code editor).
Step-by-step instructions
- Open the .pas file in a code editor from your file manager (Open With → a text/code editor).
- If installed, use a Pascal environment/tooling (for example Free Pascal–based workflows) to compile; otherwise, treat it as plain text for viewing.
- If your desktop doesn’t recognize .pas correctly, check the file’s association via the shared MIME database configuration used by your Linux desktop.
Common issues
The .PAS file opens in the wrong app (or as an unknown file)
Your system may not have a Pascal-aware editor/IDE associated with .pas, so it defaults to an unrelated app or shows “unknown format.”
- Use “Open with” and select a text/code editor to view the file content.
- If you regularly work with Pascal, set your chosen editor/IDE as the default app for .pas files.
It’s not actually Pascal source code
Sometimes files are mislabeled or downloaded with the wrong extension; a .pas should typically be readable text containing Pascal/Object Pascal keywords (e.g., unit, interface, implementation, begin, end).
- Open the file in a plain text editor and verify it looks like Pascal source code.
- If it looks like binary/garbled data, re-download the file or ask the sender what program created it.
Compiler/IDE errors when building a .PAS file
A .pas file is usually part of a larger project (units depend on other units, project files, and library paths). Opening a single unit may not be enough to compile successfully.
- Obtain the full project (all referenced units and supporting files), not just one .pas file.
- In Delphi workflows, open the project in Delphi/RAD Studio rather than compiling a single unit in isolation.
Security note
.PAS files are plain text source code, but they may be part of a project that builds an executable; treat code from untrusted sources as potentially harmful if compiled and run.