Developer Utilities

Chmod Calculator

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Convert Unix file permissions between symbolic and octal. - runs entirely in your browser. Free, fast and private.

How it works

Four simple steps

1

Toggle permission bits

Click read/write/execute for user, group, and other.

2

See octal value

Symbolic rwx maps to a three-digit chmod number.

3

Convert both ways

Type octal like 755 to update symbolic checkboxes.

4

Copy chmod command

Copy chmod 755 filename ready for your shell.

Chmod Calculator

About Chmod Calculator

Chmod Calculator is a free developer utilities utility on OneDevToolkit. Convert Unix file permissions between symbolic and octal. It runs in your browser for this session - use the workspace on this page to try it.

Need a related step? Open the Developer Utilities hub at /developer-tools/ or the <a href="/blog/">blog</a> for longer workflows.

Features

Lightning fast

Processes data instantly with no server round-trips.

100% private

Your data never leaves your browser. Nothing is uploaded.

No installation

Works in any modern browser. Nothing to download or install.

Free forever

No limits, no sign-up, no credit card required.

Cross-platform

Works on desktop, tablet and mobile devices.

Dark & light mode

Beautiful in both themes. Your preference is saved.

Keyboard shortcut

Ctrl Enter - Run tool

Use cases

For developers

Use Chmod Calculator to format, validate, or transform data while debugging or reviewing a PR.

For local workflows

Keep payloads on your device - no upload farm between you and the result.

With Recipes

Chain related code tools in Recipe Studio when you need multi-step transforms.

Instructions

How to use this tool

FAQ

Frequently asked questions

See all FAQs

Answers for this tool. For site-wide help, open the FAQ hub.

Chmod Calculator convert unix file permissions between symbolic and octal. Output stays in your browser for quick iteration.

Prefer redacted samples. Even with local processing, treat prod credentials carefully and rotate anything accidentally shared.

No. Generators and linters produce text for you to copy into Git, CI, or consoles - they do not deploy for you.

Always run official CLIs (kubectl, terraform plan, actionlint, etc.) on the final files after using Chmod Calculator as a starting point.

Syntax may vary across Kubernetes/Terraform/GitHub Actions versions. Adjust generated snippets to your runtime version.

After the page loads, most authors work offline. Keep a local copy of critical manifests.

Commit reviewed files to Git rather than sharing long-lived links with secrets in query strings.

Use Sample to learn the format, edit, then Download/Copy into your editor.

Request it via Contact with the platform and version you use.

View more FAQs

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