Linux Tools
Linux Permission Calculator
Calculate and convert Linux file permissions easily.
File Permission Converter
Convert between octal, symbolic, and binary file permission notations.
Quick Presets
Bidirectional Converter
3 or 4 digit octal value (0000 - 7777).
9-character notation (r, w, x, s, t, or -).
9-bit or 12-bit binary notation (grouped by 3 bits).
Interactive Permissions Grid
Special Flags
Owner (u)
Group (g)
Others (o)
Equivalent chmod command
$ chmod 0755 file.txt
Symbolic chmod command
$ chmod u=rwx,g=rx,o=rx file.txt
Permission Breakdown
Frequently Asked Questions
What is the difference between 644 and 755?
644 (rw-r--r--) gives owner read/write and others read-only, ideal for files. 755 (rwxr-xr-x) adds execute permission for all, used for directories and executables.
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