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Linux Permission Calculator

Convert Unix octal file permissions to symbolic rwx and review special mode bits.

Processed in your browser · No account or file upload needed

Three digits (755) or four digits (0755/4755). The first digit represents setuid, setgid, and sticky bits.

Enter input and select Run tool.

How to use this utility

File mode digits represent read (4), write (2) and execute (1) for owner, group and others. The leading digit controls setuid, setgid and the sticky bit. For example, 0755 means owner rwx and group/others r-x. Special bits require additional review because they affect execution or deletion behavior. This tool generates a reference command; it never runs commands or changes file permissions. Verify ownership, filesystem type, and the security implications before running chmod.

Local processing: This page performs calculations in your browser. It does not make remote API requests, persist your input, or send telemetry. Input is capped to protect responsiveness.

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