Calculate Unix file permissions (chmod), AWS IAM policies, and Kubernetes RBAC rules. Visualize access matrices.
This tool converts Unix file permissions between numeric form (e.g. 750) and symbolic form (e.g. rwxr-x---), and separately helps assemble AWS IAM policy statements and Kubernetes RBAC Role/RoleBinding rules, displaying each as a visual matrix of subjects against their granted permissions. The three modes are distinct calculators sharing one interface, not a unified cross-platform permission translator. The most common mistake is treating the generated IAM or RBAC output as final: it reflects only the actions, resources, or verbs you entered and still needs review against real resource ARNs, namespaces, and least-privilege requirements before it goes into a policy file.
A concrete input and expected output from the current implementation.
Input
640
Expected output
rw-r-----
The digit 6 (owner) decomposes to read(4)+write(2); 4 (group) is read only; 0 (other) is no access, giving the nine-character string rw-r-----.
Each octal digit from 0-7 represents a permission set as the sum of read(4), write(2), and execute(1). The tool decomposes the owner, group, and other digits into their component bits and renders the nine-character rwx string, or runs the process in reverse when you type symbolic notation instead.
For IAM and RBAC modes you pick actions or verbs and target resources, and the tool assembles the corresponding JSON policy statement or YAML Role/RoleBinding skeleton. It also renders a grid of subjects against permissions so you can visually scan coverage and gaps before copying the output into your actual policy or manifest file.
It gives you syntactically structured JSON based on what you selected, but it is not checked against AWS's policy simulator or your account's actual resources. Review resource ARNs, conditions, and explicit Allow/Deny effects before attaching it to a role or user.
No. It only calculates and displays the chmod notation, IAM policy, or RBAC YAML locally; you still have to run chmod yourself, or apply the generated policy with the AWS console/CLI or kubectl.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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