SJ Chmod Calculator
Calculate Chmod permissions
Free · In-App Purchases · Designed for iPad
SJ Chmod Calculator is a free iOS app designed for system administrators, developers, and Linux/Unix users who need to quickly and accurately calculate, understand, and convert Unix file permissions.
With its clear and intuitive interface, the app makes it easy to switch between numeric and symbolic representations of file permissions.
SJ Chmod Calculator offers two simple methods to obtain or verify file or directory access rights.
First mode: Numeric code input (755, 644, 600, etc.)
The user enters a 3-digit chmod value. The app instantly displays:
– A permissions table (read, write, execute) for each category: User (owner), Group, Others
– The equivalent symbolic notation (e.g., rwxr-xr-x)
Second mode: Interactive table input
The user simply checks the boxes for read (R), write (W), and execute (X) for each category. The app automatically calculates:
– The corresponding numeric chmod value
– The Unix symbolic permission string
Key features:
– Instant conversion between numeric and symbolic notation
– Visual table of permissions by category (user, group, others)
– Intuitive interface, easy to use
– Free application
A practical tool for all Linux/Unix users
Whether you’re a developer, system administrator, student, or advanced user of Unix/Linux systems, SJ Chmod Calculator helps you manage file permissions quickly and effortlessly.
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- Fixed an issue with ads
The developer, Stephane JAILLIARD, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Stephane JAILLIARD
- Size
- 3.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
English and 10 more
- English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- A pizza ₦ 14,900.00
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- A cookie ₦ 4,900.00
- A coffee ₦ 1,500.00
- No ads ₦ 7,900.00
- Copyright
- © 2025 Stéphane JAILLIARD