Unix Permissions Calculator

Toggle 9 permission bits to instantly generate chmod numeric and symbolic notation

Read r
Write w
Execute x
Owner
Group
Other
Octal
644
Symbolic
-rw-r--r--
💡 Regular file; owner can read and write

Quick guide

Use cases, answers, and nearby tools

Compact below-tool notes that help first-run users and repeated visitors move faster without changing the main interface.

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How to use

Run a clean first pass

  1. Click the toggles in the matrix or type a 3-digit octal value (e.g. 755) in the reverse input.
  2. Watch the octal number and symbolic string (e.g. -rwxr-xr-x) update instantly.
  3. Copy the numeric or symbolic output to use directly in chmod commands or config files.

Examples

Real jobs this page helps with

  • Web directory setupApply preset 755 to confirm a web directory is world-readable but only owner-writable.
  • Private key protectionQuickly verify that 600 means owner read/write only with no access for others.