Detects the likely real file format from filename, file creation time, file size
Detects the likely real file format from filename, file creation time, file size, and the first 200 bytes of the file. Identifies common formats such as PDF, DOCX, XLSX, CSV, JPG/JPEG, PNG, WEBP, HEIC, TXT, HTML, MP3, WAV, MP4, AVI, MPEG, and WEBM, as well as about 15,000 other file types.
Answeringour last check, 2026-10-03
1 of 1checks answered this week
375 msmedian answer time
$0.002listed price per call
$0.002price 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
POST https://convert.guru/api/x402/v1/detect-file-type
| Category | Everything else |
|---|---|
| Provider host | convert.guru |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-03 | valid payment request | 402 | $0.002 | 375 ms |
Example input (from the provider)
{
"body": {
"created_at": "2026-05-21T14:30:00Z",
"filename": "document.001",
"header_first_200_bytes_base64": "JVBERi0xLjQKJcTl8uXrp...",
"size_bytes": 184221
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"body": {
"properties": {
"created_at": {
"description": "File creation timestamp in ISO 8601 format",
"type": "string"
},
"filename": {
"description": "Original filename, e.g. document.pdf, report.docx, data.csv, image.png",
"type": "string"
},
"header_first_200_bytes_base64": {
"description": "Base64 encoded first 200 bytes of the file",
"type": "string"
},
"size_bytes": {
"description": "Total size of the file in bytes",
"type": "integer"
}
},
"required": [
"filename",
"header_first_200_bytes_base64",
"size_bytes"
],
"type": "object"
},
"bodyType": {
"const": "json",
"type": "string"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"convert_file_compatibility": {
"properties": {
"confidence": {
"type": "number"
},
"reason": {
"type": "string"
},
"status": {
"type": "string"
}
},
"required": [
"status",
"confidence",
"reason"
],
"type": "object"
},
"convertible_to": {
"items": {
"type": "string"
},
"type": "array"
},
"detected": {
"type": "boolean"
},
"detected_format": {
"properties": {
"canonical_extension": {
"type": "string"
},
"confidence": {
"type": "number"
},
"confidence_percent": {
"type": "integer"
},
"description": {
"type": "string"
},
"format": {
"description": "Canonical format e.g. pdf, docx, xlsx, csv, png, jpg, webp, txt, html",
"type": "string"
}
},
"required": [
"format",
"description",
"confidence",
"confidence_percent",
"canonical_extension"
],
"type": [
"object",
"null"
]
},
"input_filename": {
"type": "string"
},
"payment": {
"type": "object"
},
"suggested_filename": {
"type": [
"string",
"null"
]
}
},
"required": [
"detected",
"input_filename",
"suggested_filename",
"detected_format",
"convertible_to",
"convert_file_compatibility",
"payment"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}