Utilities🌐 YAS server-sideAPI availableintermediate

chmod Calculator

Converts between symbolic and numeric (octal) Unix permission modes.

Processed by YAS · not stored

Ready to runInstant execution

Result

—

What does this tool do?

Converts between symbolic and numeric (octal) Unix permission modes.

Why would I use it?

You are setting file permissions on a server.
You want to translate chmod 755 into symbolic form.
You are auditing permission bits.

Real-life example

Input

Output

rwxr-xr-x · owner rwx, group r-x, others r-x

Each digit maps to read/write/execute.

Input → Process → Output → Next

Input: Enter a numeric or symbolic mode.
Process: YAS converts between the two notations.
Output: Both forms with an explanation.
Next action: Apply the mode with chmod on your server.

Common mistakes

Using 777 for everything (world-writable).
Forgetting the sticky bit / setuid semantics.
Using symbolic modes with wrong ordering (ugoa).

What the result means

The octal digits encode owner/group/other permissions.

Privacy & security

Your input is sent to YAS infrastructure because the tool requires server-side processing or public network queries. Input is not stored.

API

Endpoint

POST https://yas.sh/api/v1/tools/chmod-calculator

Request Header

Content-Type: application/json

cURL

curl -X POST "https://yas.sh/api/v1/tools/chmod-calculator" \
  -H "Content-Type: application/json" \
  -d '{"input":"755"}'

JavaScript

const res = await fetch("https://yas.sh/api/v1/tools/chmod-calculator", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "input": "755"
}),
});
const data = await res.json();

Python

import requests

r = requests.post("https://yas.sh/api/v1/tools/chmod-calculator", json={"input":"755"})
data = r.json()

Field	Type	Required	Description
input	string	Yes	e.g. 755, 4755, u=rwx,go=rx, or a+rwx

Success response

{ "result": { "input": "755", "numeric": "755", "symbolic": "u=rwx,go=rx", "special": "none", "bits": { "owner": "rwx", "group": "r-x", "other": "r-x" } } }

Convert between numeric (755) and symbolic (u=rwx,go=rx) permission modes, incl. special bits.

Error responses

400 VALIDATION_ERROR — invalid input or unsupported option.
413 PAYLOAD_TOO_LARGE — input exceeds the 64 KB limit.
429 RATE_LIMIT_EXCEEDED — rate limit exceeded (60 req/min).

Limits

Maximum input: 64 KB per request.
Rate limit: 60 requests/min per IP address.
Authenticated accounts benefit from higher tier quotas.