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ENR (.enr)

.enr file signature | application/x-endnote-refer

ENR is a reference file format associated with EndNote, a citation management system originally developed by Thomson Reuters and now maintained by Clarivate. It is used to store bibliographic entries and citation data for importing, exporting, and exchanging references with EndNote and compatible academic tools. The format is legacy-oriented and generally safe, although files from untrusted sources should still be reviewed before import because they can alter reference libraries.

Safe

Magic Bytes

Offset 0
25 41 20

Sources: Apache Tika

Extension

.enr

MIME Type

application/x-endnote-refer

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .enr files in Python

Python 
def is_enr(file_path: str) -> bool:
    """Check if file is a valid ENR by magic bytes."""
    signature = bytes([0x25, 0x41, 0x20])
    with open(file_path, "rb") as f:
        return f.read(3) == signature

How to validate .enr files in Node.js

Node.js 
function isENR(buffer: Buffer): boolean {
  const signature = Buffer.from([0x25, 0x41, 0x20]);
  return buffer.subarray(0, 3).equals(signature);
}

How to validate .enr files in Go

Go 
func IsENR(data []byte) bool {
    signature := []byte{0x25, 0x41, 0x20}
    if len(data) < 3 {
        return false
    }
    return bytes.Equal(data[:3], signature)
}

API Endpoint

GET /api/v1/enr
curl https://filesignature.org/api/v1/enr

See the full API documentation for all endpoints and parameters.

Related Formats

.enw

Frequently Asked Questions

What is a .enr file?

A .enr file is identified by the magic bytes 25 41 20 at byte offset 0. ENR is a reference file format associated with EndNote, a citation management system originally developed by Thomson Reuters and now maintained by Clarivate. It is used to store bibliographic entries and citation data for importing, exporting, and exchanging references with EndNote and compatible academic tools. The format is legacy-oriented and generally safe, although files from untrusted sources should still be reviewed before import because they can alter reference libraries.

What are the magic bytes for .enr files?

The magic bytes for ENR files are 25 41 20 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .enr file?

To validate a .enr file, read the first bytes of the file and compare them against the known magic bytes (25 41 20) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .enr files?

The primary MIME type for .enr files is application/x-endnote-refer.

Is it safe to open .enr files?

ENR (.enr) 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.