Chmod calculator. Convert Unix file permissions between numeric (755, 644) and symbolic (rwxr-xr-x) formats with interactive checkboxes.
100% browser-based — your data never leaves your device
Convert Unix file permissions between numeric and symbolic formats.
Type a three-digit octal number (e.g., 755, 644, 777) in the numeric field.
Click the convert button to see the symbolic representation (e.g., rwx r-x r-x).
Type symbolic notation with three groups separated by spaces (e.g., rw- r-- r--).
Toggle setuid, setgid, and sticky bit options for special permission modes.
Binary: 1011110011
755 = rwx r-x r-x
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Chmod Calculator is a free online math tool that convert unix file permissions between numeric and symbolic formats. It works entirely in your browser — no downloads, no installations, and no server uploads required. engineers, data scientists, students use Chmod Calculator when they need a fast, privacy-respecting way to process math data without installing additional software. It supports capabilities such as numeric to symbolic, permission breakdown, interactive checkboxes. Additional features include common modes. Common use cases include setting correct file permissions on linux servers during deployment, converting between numeric (755) and symbolic (rwxr-xr-x) permission formats, auditing and fixing permission issues on shared hosting environments. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes Chmod Calculator ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
Chmod Calculator is a free online math tool that helps you convert unix file permissions between numeric and symbolic formats. Key capabilities include numeric to symbolic, permission breakdown, interactive checkboxes. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to setting correct file permissions on linux servers during deployment.
Type a chmod value like 755, or use the checkboxes to set permissions visually.
See the numeric value and symbolic notation update simultaneously.
Use the quick-select dropdown for standard permission sets (755, 644, 700, etc.).
| Category | Details |
|---|---|
| Input Limits | Numeric precision: 64-bit IEEE 754 (double) |
| Result precision: Up to 16 significant digits | |
| Supported Formats | Decimal, Hexadecimal, Binary, Octal, Scientific notation |
| Browser Engine |
|
All operations run entirely in your browser using built-in Math APIs. No server uploads, no data storage, and no third-party requests.
Chmod Calculator is ideal when you need to setting correct file permissions on linux servers during deployment without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For one-off tasks and quick processing, Chmod Calculator is faster than setting up a local development environment or using a command-line tool.
No. Chmod Calculator processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
755 means the owner has read, write, and execute permissions (7), while the group and others have read and execute permissions (5). It is common for directories and scripts.
Symbolic notation like rwxr-xr-- breaks down into three groups: owner (rwx), group (r-x), and others (r--). Each position indicates read, write, or execute permission.
Convert chmod numeric values (755) to symbolic notation (rwxr-xr-x).
See the read, write, execute status for owner, group, and others.
Toggle permissions visually and see the chmod command update live.
Quick-select from common permission sets (644, 755, 700, etc.).
Chmod Calculator is useful in a variety of scenarios across different workflows:
Setting correct file permissions on Linux servers during deployment
Converting between numeric (755) and symbolic (rwxr-xr-x) permission formats
Auditing and fixing permission issues on shared hosting environments
File permissions are divided into owner, group, and others. Use 700 for private files, 755 for public directories, and 644 for public files.
755 for directories and executables, 644 for regular files, 600 for sensitive configs, and 700 for private scripts.
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