Unix chmod calculator
Unix chmod calculator - octal to symbolic and back, what owner, group and others can do, umask equivalents and warnings for setuid and world-writable modes
Answeringour last check, 2026-10-20
1 of 1checks answered this week
269 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/dev/chmod
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.01 | 269 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"mode": "4755"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"mode": {
"description": "Octal such as 755 or 4755, or symbolic such as rwxr-xr-x",
"type": "string"
}
},
"required": [
"mode"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"command": {
"description": "Ready-to-run chmod command",
"type": "string"
},
"group": {
"description": "What the group can do",
"type": "string"
},
"octal": {
"description": "Octal mode",
"type": "string"
},
"others": {
"description": "What everyone else can do",
"type": "string"
},
"owner": {
"description": "Owner address",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"symbolic": {
"description": "Symbolic mode",
"type": "string"
},
"umask_for_these_permissions_as_directories": {
"description": "Umask for these permissions as directories",
"type": [
"string",
"null"
]
},
"umask_for_these_permissions_as_files": {
"description": "Umask for these permissions as files",
"type": "string"
},
"warnings": {
"description": "Security warnings for the mode",
"type": "array"
}
},
"required": [
"octal",
"symbolic"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}