Document
Rich Text Format is a document format commonly identified by .rtf. Use the listed signatures, MIME types, and structure notes to validate files beyond the extension.
7B 5C 72 74 66 {\rtfSIGNATURE = bytes.fromhex("7b5c727466")
OFFSET = 0
def is_rtf(path: str) -> bool:
with open(path, "rb") as f:
f.seek(OFFSET)
head = f.read(len(SIGNATURE))
return head == SIGNATUREconst SIGNATURE = [0x7b, 0x5c, 0x72, 0x74, 0x66];
const OFFSET = 0;
// bytes: a Uint8Array / Buffer holding the start of the file
export function isRtf(bytes) {
return SIGNATURE.every((byte, i) => bytes[OFFSET + i] === byte);
}package fileid
import "bytes"
var isrtfSignature = []byte{0x7b, 0x5c, 0x72, 0x74, 0x66}
const isrtfOffset = 0
func IsRtf(b []byte) bool {
end := isrtfOffset + len(isrtfSignature)
if len(b) < end {
return false
}
return bytes.Equal(b[isrtfOffset:end], isrtfSignature)
}const SIGNATURE: &[u8] = &[0x7b, 0x5c, 0x72, 0x74, 0x66];
const OFFSET: usize = 0;
fn is_rtf(bytes: &[u8]) -> bool {
bytes.get(OFFSET..OFFSET + SIGNATURE.len()) == Some(SIGNATURE)
}<?php
$signature = "\x7b\x5c\x72\x74\x66";
$offset = 0;
function is_rtf(string $bytes): bool {
global $signature, $offset;
return substr($bytes, $offset, strlen($signature)) === $signature;
}Rich Text Format is used for data exchange, imports, exports, parser testing, and validation workflows. Encoding, delimiters, versions, and container structure often change implementation behavior.
Document formats may include scripts, attachments, macros, or external references. Sandbox previews and conversions, and avoid opening untrusted files directly.
11 samples help test leading-byte detection, parser errors, upload limits, and download behavior.
Blue Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
01-blue-sky.rtfca46ce089c878dfc268d903cb18e634fe502455a2500742864a48707e63c6ddcFlower Garden RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
02-flower-garden.rtf915800782ddea2e4e4bcf64c1de1ea6041ce385f99ce3fd48943aa4de28289aaNavy Blue Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
03-navy-blue-sky.rtf14e55c9ca5e4611245aeafb27928a0a0f2df1e752e889115a64cca98c1155702Nature of the Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
04-nature-sky.rtfb710eefc8fb8b2966bed7a4d98f0a6c213238e9ee43fe6423ffba92b2cc5e901Sky Landscape RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
05-sky-landscape.rtf332089461015ea27eab1e0d60f51d146d349973d9545d65e46164fc47e7ec621Starry Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
06-starry-sky.rtfc3222088a1b69243cf944ab189e61ca4e487077d0f95be7f952adb471d96fd5dBlue Night Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
07-blue-night-sky.rtfffd9fb1fcb1233b02129b1ff29b537a7f10b5d8f1d78a842911a44a68ba768b5Hibiscus Flower RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
08-hibiscus-flower.rtf4d12c8526787593fb26dca21259ee6d13c22ad03f13cae14df94cb3beb794833Arctic Sky RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
09-arctic-sky.rtf9c14832a446200557a1ff38c9a0a066f1cfcfd7c635fa48301f894bdaca4dd15Sunset Rays RTF is a Rich Text Format sample based on Wikimedia Commons. It can be used to test downloads, parsers, previews, and file type detection.
10-sunset-rays.rtf390d4af0959bf64bc2020ab4ca4eead0f7c14a3c55330a9bd6532b39f3dedb1eNASA Blue Marble RTF is a Rich Text Format 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.rtfe5b07989f55a9da71bfdb9fdcd1e17ea45aea807d25571cca6da9886e0fc908cRich Text Format files begin with the byte signature 7B 5C 72 74 66 ("{\rtf"). Detect the format by reading these leading bytes rather than trusting the file extension alone.
The MIME type for Rich Text Format is application/rtf, text/rtf.
Rich Text Format files use the .rtf extension. The extension is a convention only and does not guarantee the file contents, so combine it with signature and structure checks.