| Read | Write | Execute | Value | |
|---|---|---|---|---|
| Owner | 7 | |||
| Group | 5 | |||
| Other | 5 |
Numeric
755
Symbolic
rwxr-xr-x
chmod Command
chmod 755 fileCommon Permission Patterns
How Unix Permissions Work
Read (r = 4): View file contents or list directory entries.
Write (w = 2): Modify file contents or add/delete files in a directory.
Execute (x = 1): Run as a program or access files within a directory.
Each permission group (Owner, Group, Other) gets a digit 0-7, calculated by adding the bit values of enabled permissions. For example: rwx = 4+2+1 = 7, r-x = 4+1 = 5.
FAQ
What is the difference between this and chmod-calculator?
Why should I avoid 777?
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About Unix Permissions
Unix Permissions was built for the moment you just need to handle developer and design work and move on — no signup, no upload to a third-party server. Processing runs locally in your browser using modern Web APIs. Nothing is uploaded, nothing is logged, and there is no quota to worry about for casual use. Like everything else in the developer collection, it is free, ad-light, and works on mobile as well as desktop.
When you'd reach for Unix Permissions
You need to handle a one-off task right before a meeting and don't have time to install anything.
Anyone working remotely on a borrowed or restricted machine.
Open the page, get the result, paste it into your doc — under a minute.
You're on a public or shared machine and don't want to leave traces of what you're working on.
Travelers, contractors, anyone working from a friend's computer.
Nothing is uploaded, nothing persists if you're not signed in.
You're cleaning up a folder of files that accumulated over a project and need to standardize them.
Designers, writers, and developers wrapping up deliverables.
Drop each file in, copy the output, move on.
You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.
Marketers and ops people whose primary tool is metered.
Stay productive without burning credits.
Frequently asked about Unix Permissions
- Are my files uploaded to a server when I use Unix Permissions?
- Unix Permissions processes everything in your browser using local APIs. Your files never leave your device.
- Do I need to create an account to use Unix Permissions?
- No. Unix Permissions works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
- Is Unix Permissions really free?
- Yes — Unix Permissions is free for unlimited personal use, with no account required and no watermark on the output.
- Can I use Unix Permissions commercially?
- Yes. The output of Unix Permissions belongs entirely to you, with no licensing restrictions.
- What browsers does Unix Permissions support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.