GRIB2 (.grib2)
.grib2 file signature | application/octet-stream
GRIB2 (GRIdded Binary) is a binary data format for gridded meteorological information, standardized and maintained by the World Meteorological Organization. It is used to distribute weather observations, forecasts, and related atmospheric, oceanographic, and land-surface data in operational forecasting and climate applications. The format is widely supported by meteorological software and is generally considered safe; however, malformed inputs may expose parser vulnerabilities in poorly maintained tools.
Magic Bytes
Offset 0
47 52 49 42
Sources: Wikipedia
Extension
.grib2
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .grib2 files in Python
def is_grib2(file_path: str) -> bool:
"""Check if file is a valid GRIB2 by magic bytes."""
signature = bytes([0x47, 0x52, 0x49, 0x42])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .grib2 files in Node.js
function isGRIB2(buffer: Buffer): boolean {
const signature = Buffer.from([0x47, 0x52, 0x49, 0x42]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .grib2 files in Go
func IsGRIB2(data []byte) bool {
signature := []byte{0x47, 0x52, 0x49, 0x42}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/grib2
curl https://filesignature.org/api/v1/grib2
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .grib2 file?
A .grib2 file is identified by the magic bytes 47 52 49 42 at byte offset 0. GRIB2 (GRIdded Binary) is a binary data format for gridded meteorological information, standardized and maintained by the World Meteorological Organization. It is used to distribute weather observations, forecasts, and related atmospheric, oceanographic, and land-surface data in operational forecasting and climate applications. The format is widely supported by meteorological software and is generally considered safe; however, malformed inputs may expose parser vulnerabilities in poorly maintained tools.
What are the magic bytes for .grib2 files?
The magic bytes for GRIB2 files are 47 52 49 42 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .grib2 file?
To validate a .grib2 file, read the first bytes of the file and compare them against the known magic bytes (47 52 49 42) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .grib2 files?
There is no officially registered MIME type for .grib2 files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .grib2 files?
GRIB2 (.grib2) 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.