Data
Tab-Separated Values is a data format commonly identified by .tsv, .tab. Use the listed signatures, MIME types, and structure notes to validate files beyond the extension.
69 6E 64 65 78 09 index.SIGNATURE = bytes.fromhex("696e64657809")
OFFSET = 0
def is_tsv(path: str) -> bool:
with open(path, "rb") as f:
f.seek(OFFSET)
head = f.read(len(SIGNATURE))
return head == SIGNATUREconst SIGNATURE = [0x69, 0x6e, 0x64, 0x65, 0x78, 0x09];
const OFFSET = 0;
// bytes: a Uint8Array / Buffer holding the start of the file
export function isTsv(bytes) {
return SIGNATURE.every((byte, i) => bytes[OFFSET + i] === byte);
}package fileid
import "bytes"
var istsvSignature = []byte{0x69, 0x6e, 0x64, 0x65, 0x78, 0x09}
const istsvOffset = 0
func IsTsv(b []byte) bool {
end := istsvOffset + len(istsvSignature)
if len(b) < end {
return false
}
return bytes.Equal(b[istsvOffset:end], istsvSignature)
}const SIGNATURE: &[u8] = &[0x69, 0x6e, 0x64, 0x65, 0x78, 0x09];
const OFFSET: usize = 0;
fn is_tsv(bytes: &[u8]) -> bool {
bytes.get(OFFSET..OFFSET + SIGNATURE.len()) == Some(SIGNATURE)
}<?php
$signature = "\x69\x6e\x64\x65\x78\x09";
$offset = 0;
function is_tsv(string $bytes): bool {
global $signature, $offset;
return substr($bytes, $offset, strlen($signature)) === $signature;
}Tab-Separated Values is used for data exchange, imports, exports, parser testing, and validation workflows. Encoding, delimiters, versions, and container structure often change implementation behavior.
Untrusted input is not safe just because the format was detected. Account for parser exceptions, large files, unexpected encodings, and external references.
11 samples help test leading-byte detection, parser errors, upload limits, and download behavior.
Blue Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
01-blue-sky.tsv7cc4332dafc0b5b4c4195f617a859b053ad974c5fb6e11c51ca907d469cfd79fFlower Garden TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
02-flower-garden.tsv0735f1405d078609c577301426738e9910f9a722a87df1d2caad414ec9425f73Navy Blue Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
03-navy-blue-sky.tsv3ef298ff2d0763a28872e550a787cd802969f80490489252e1060716b60c0ac2Nature of the Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
04-nature-sky.tsv6b632fa9c3048f3ecaebeebd903466fc08c6258907f8ccb925fceff47edad489Sky Landscape TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
05-sky-landscape.tsv2bf7cd4e735c8856998b0676885278ecde0b314739fd4ac48cb6612d885154b5Starry Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
06-starry-sky.tsv3d4a3cfa3c78c4d7e6b533b9f104f32ff99abb28347cabe524b1f363c7438132Blue Night Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
07-blue-night-sky.tsvb9093471f57aff1e15183fd8ae1263fe29dc9525c4f2c1e3ee5205278d25db66Hibiscus Flower TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
08-hibiscus-flower.tsved4ae8b7f1364176e4e4f00844ccecfffb4d70036b885b8ecb918ababf876c24Arctic Sky TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
09-arctic-sky.tsv03fd96063f64b6e2cb93d0097061f53315facc0d42ba2369e08220e88d4d5d9eSunset Rays TSV is a Tab-Separated Values sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
10-sunset-rays.tsv8e269dc9224d702ca825587b5458e59f48ce95bf2228b66e1aaba2faf7a3affaNASA Blue Marble TSV is a Tab-Separated Values sample based on NASA Image and Video Library. It can be used to test downloads, parsers, previews, and file type detection.
nasa-blue-marble-2012-east.tsv4cfbcc778162f9ff078783ff8c5cbf6cbdf2dff658e3af5e3e525c20eea44605Tab-Separated Values files begin with the byte signature 69 6E 64 65 78 09 ("index."). Detect the format by reading these leading bytes rather than trusting the file extension alone.
The MIME type for Tab-Separated Values is text/tab-separated-values.
Tab-Separated Values files use the .tsv, .tab extension. The extension is a convention only and does not guarantee the file contents, so combine it with signature and structure checks.