Chmod Calculator
Chmod Calculator is a free online calculator that helps you convert between numeric (755) and symbolic (rwxr-xr-x) Unix file permissions. Free, instant, in-browser. Chmod Calculator uses 2 input fields, returns 3 output values, and runs in your browser on the device.
Key facts
- Inputs
- 2 fields: Direction and Permission
- Outputs
- 3 values: Numeric, Symbolic, and Breakdown
- Runtime
- your browser on the device
- Mode
- Calculator
- Privacy
- Files and text stay in the browser session.
- Cost
- $0, no account required
How to use Chmod Calculator
- 1
Paste or fill in the input
Enter your text or values into the input fields on the page.
- 2
Run the utility
Click Compute to run the utility in your browser and review the result.
- 3
Copy the output
Copy the output value you need from the result panel.
Chmod Calculator details
First, enter Direction in Chmod Calculator. Next, review Numeric, Symbolic, and Breakdown. Additionally, Chmod Calculator uses 2 input fields and 3 output blocks so the result is easy to scan and copy.
Enter a numeric chmod value like 755 or 0644 and see its symbolic representation (rwxr-xr-x), or enter symbolic permissions and get the numeric equivalent. The tool shows a detailed breakdown of owner, group, and others permissions including read, write, execute, setuid, setgid, and sticky bit. Supports both 3-digit and 4-digit octal formats. Essential for Linux and macOS system administrators, DevOps engineers, and developers working with file permissions, deployment scripts, Dockerfiles, or CI/CD pipelines. Runs entirely in your browser.
Common searches
- chmod calculator
- chmod converter
- file permissions calculator
- unix permissions calculator
- chmod 755
- chmod 644
Related tools
Tools that work with the same formats — most users open one of these next.
Htaccess to Nginx Converter
Convert Apache .htaccess rewrite rules and directives to nginx configuration — free, in your browser.
JSON Validator & Formatter
Validate JSON and see errors with line numbers — plus auto-format/beautify. Free, instant, in-browser.
User-Agent Parser
Parse a browser User-Agent string into structured browser/engine/OS/device fields.
MIME Type Lookup
Look up the MIME type for a file extension, or the canonical extensions for a MIME type — covering 100+ common types.
CSV Validator
Validate CSV data — check column consistency, count rows and surface parse errors.
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards. Free, instant, copy-paste ready.
Frequently asked
What is Chmod Calculator?
Chmod Calculator is a free online calculator that helps you convert between numeric (755) and symbolic (rwxr-xr-x) Unix file permissions. Free, instant, in-browser. Chmod Calculator uses 2 input fields, returns 3 output values, and runs in your browser on the device.
What inputs and outputs does Chmod Calculator use?
Chmod Calculator uses 2 input fields: Direction and Permission. Chmod Calculator returns 3 output values: Numeric, Symbolic, and Breakdown.
Do my files and data stay private?
Yes. Chmod Calculator runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use Chmod Calculator?
Open Chmod Calculator, paste or fill in the input fields, and the result updates instantly. Chmod Calculator runs in your browser with no upload and no waiting.
Which browsers does Chmod Calculator support?
Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Chmod Calculator uses standard web APIs and does not require any plugin, extension, or sign-up.