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Revit Project File subheader (.rvt)

.rvt file signature | application/octet-stream

The Revit Project File format is a proprietary building information modeling file format developed and maintained by Autodesk for use with Autodesk Revit. It stores architectural, structural, and mechanical design data for creating, editing, and coordinating 3D building models, construction documentation, and project collaboration. These files are generally safe, but as with other complex design documents, they should be opened only in trusted software and kept updated to avoid compatibility issues.

Safe

Magic Bytes

Offset 512
00 00 00 00 00 00 00 00

Sources: Gary Kessler

All Known Signatures

2 signature variants are documented for .rvt files across multiple sources.

Hex Signature Offset Sources
00 00 00 00 00 00 00 00 512 Gary Kessler
D0 CF 11 E0 A1 B1 1A E1 0 Gary Kessler

Extension

.rvt

MIME Type

application/octet-stream

Byte Offset

512

Risk Level

Safe

Validation Code

How to validate .rvt files in Python

Python 
def is_rvt(file_path: str) -> bool:
    """Check if file is a valid RVT by magic bytes at offset 512."""
    signature = bytes([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])
    with open(file_path, "rb") as f:
        f.seek(512)
        return f.read(8) == signature

How to validate .rvt files in Node.js

Node.js 
function isRVT(buffer: Buffer): boolean {
  const signature = Buffer.from([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
  if (buffer.length < 520) return false;
  return buffer.subarray(512, 520).equals(signature);
}

How to validate .rvt files in Go

Go 
func IsRVT(data []byte) bool {
    signature := []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
    if len(data) < 520 {
        return false
    }
    return bytes.Equal(data[512:520], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Related Formats

.pdb .tbi .xxx

Frequently Asked Questions

What is a .rvt file?

A .rvt file is a Revit Project File subheader file. The Revit Project File format is a proprietary building information modeling file format developed and maintained by Autodesk for use with Autodesk Revit. It stores architectural, structural, and mechanical design data for creating, editing, and coordinating 3D building models, construction documentation, and project collaboration. These files are generally safe, but as with other complex design documents, they should be opened only in trusted software and kept updated to avoid compatibility issues.

What are the magic bytes for .rvt files?

The magic bytes for Revit Project File subheader files are 00 00 00 00 00 00 00 00 at byte offset 512. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .rvt file?

To validate a .rvt file, read the first bytes of the file and compare them against the known magic bytes (00 00 00 00 00 00 00 00) at offset 512. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .rvt files?

There is no officially registered MIME type for .rvt files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .rvt files?

Revit Project File subheader (.rvt) 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.