OpenDocumentSpreadsheet (.ods)

.ods file signature | application/vnd.oasis.opendocument.spreadsheet

zip file formatand formats based on it, such asEPUB,JAR,ODF,OOXML

Safe

Magic Bytes

Offset 0


              50 4B

Sources: Apache Tika

All Known Signatures

3 signature variants are documented for .ods files across multiple sources.

Hex Signature	Offset	Sources
50 4B	0	Apache Tika
50 4B 03 04 50 4B 05 06 50 4B 07 08	0	Wikipedia
6D 69 6D 65 74 79 70 65 61 70 70 6C 69 63 61 74 69 6F 6E 2F 76 6E 64 2E 6F 61 73 69 73 2E 6F 70 65 6E 64 6F 63 75 6D 65 6E 74 2E 73 70 72 65 61 64 73 68 65 65 74	0	Neil Harvey FileSignatures

Extension

.ods

MIME Type

application/vnd.oasis.opendocument.spreadsheet

Byte Offset

Risk Level

Safe

Validation Code

How to validate .ods files in Python

Python

def is_ods(file_path: str) -> bool:
    """Check if file is a valid ODS by magic bytes."""
    signature = bytes([0x50, 0x4B])
    with open(file_path, "rb") as f:
        return f.read(2) == signature

How to validate .ods files in Node.js

Node.js

function isODS(buffer: Buffer): boolean {
  const signature = Buffer.from([0x50, 0x4B]);
  return buffer.subarray(0, 2).equals(signature);
}

How to validate .ods files in Go

func IsODS(data []byte) bool {
    signature := []byte{0x50, 0x4B}
    if len(data) < 2 {
        return false
    }
    return bytes.Equal(data[:2], signature)
}

API Endpoint

GET /api/v1/ods


              curl https://filesignature.org/api/v1/ods

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .ods file?

A .ods file is a OpenDocumentSpreadsheet file. zip file formatand formats based on it, such asEPUB,JAR,ODF,OOXML

What are the magic bytes for .ods files?

The magic bytes for OpenDocumentSpreadsheet files are 50 4B at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ods file?

To validate a .ods file, read the first bytes of the file and compare them against the known magic bytes (50 4B) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .ods files?

The primary MIME type for .ods files is application/vnd.oasis.opendocument.spreadsheet.

Is it safe to open .ods files?

OpenDocumentSpreadsheet (.ods) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.