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Octal vs symbolic
Octal like 755 encodes read/write/execute for owner, group, and others. Symbolic chmod uses u/g/o and r/w/x. Both describe the same bitmask—pick whichever your runbook uses.
Privacy
Editing and conversion run in your browser for these workflows—nothing is uploaded to our servers for the core tool actions. Clear sensitive data on shared machines when you are done.