Soft Sky SVG
Soft Sky SVG is a Scalable Vector Graphics sample generated for file format testing, 640 x 360. It can be used to test downloads, parsers, previews, and file type detection.
soft-sky.svgResolution 640 x 360 230 Kpx
526 B DownloadImage
SVG Scalable Vector Graphics
Scalable Vector Graphics is a image format commonly identified by .svg. Use the listed signatures, MIME types, and structure notes to validate files beyond the extension.
Extensions .svg
MIME image/svg+xml
Magic numbers
Analyze your fileoffset 0 Scalable Vector Graphics leading signature
3C 73 76 67 <svgoffset 0 Scalable Vector Graphics leading signature
3C 3F 78 6D 6C <?xmlStructure
- Optional XML declaration
- svg root element
- Shapes
- Styles
- Metadata
Caveats
- Do not trust the extension alone. Check the MIME type, the first bytes such as 3C 73 76 67, and format-specific structure when possible.
- Container formats and damaged files can share the same opening bytes, so deeper validation may be required for production upload, preview, or conversion flows.
Detection example
SIGNATURE = bytes.fromhex("3c737667")
OFFSET = 0
def is_svg(path: str) -> bool:
with open(path, "rb") as f:
f.seek(OFFSET)
head = f.read(len(SIGNATURE))
return head == SIGNATUREconst SIGNATURE = [0x3c, 0x73, 0x76, 0x67];
const OFFSET = 0;
// bytes: a Uint8Array / Buffer holding the start of the file
export function isSvg(bytes) {
return SIGNATURE.every((byte, i) => bytes[OFFSET + i] === byte);
}package fileid
import "bytes"
var issvgSignature = []byte{0x3c, 0x73, 0x76, 0x67}
const issvgOffset = 0
func IsSvg(b []byte) bool {
end := issvgOffset + len(issvgSignature)
if len(b) < end {
return false
}
return bytes.Equal(b[issvgOffset:end], issvgSignature)
}const SIGNATURE: &[u8] = &[0x3c, 0x73, 0x76, 0x67];
const OFFSET: usize = 0;
fn is_svg(bytes: &[u8]) -> bool {
bytes.get(OFFSET..OFFSET + SIGNATURE.len()) == Some(SIGNATURE)
}<?php
$signature = "\x3c\x73\x76\x67";
$offset = 0;
function is_svg(string $bytes): bool {
global $signature, $offset;
return substr($bytes, $offset, strlen($signature)) === $signature;
}Practical usage
Use cases
Scalable Vector Graphics is commonly used for image previews, thumbnails, metadata checks, and upload validation. Test multiple sizes because resolution, alpha support, compression, and file size often affect implementation behavior.
Common detection mistakes
- The .svg extension alone does not prove the file contents. Upload and conversion flows should combine extension, MIME type, leading bytes, and format-specific structure checks.
- Scalable Vector Graphics can start with signatures such as 3C 73 76 67 or 3C 3F 78 6D 6C, but related containers and damaged files may require additional validation.
Security notes
Media files can still stress decoders through corrupt metadata, extreme dimensions, long durations, or unusual chunks. Read size, dimensions, and duration before processing.
Using samples
11 samples help test tiny images, high-resolution images, alpha channels, and hard-to-compress assets.
Sample files
11 / 11 files
Blue Sky SVG
Blue Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 64 x 64. It can be used to test downloads, parsers, previews, and file type detection.
01-blue-sky.svgResolution 64 x 64 4 Kpx
658 B SHA-256
d354cdd8ca8a36f09a6b412b5b6f2603c69a09a95796e9065069a9a8e3e19c7d
Flower Garden SVG
Flower Garden SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 128 x 72. It can be used to test downloads, parsers, previews, and file type detection.
02-flower-garden.svgResolution 128 x 72 9 Kpx
669 B SHA-256
c92ee56b9ed9ceb6c2f4ac18f838fe80d70b215d2ef062f4e0b7821c7b012ba8
Navy Blue Sky SVG
Navy Blue Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 256 x 144. It can be used to test downloads, parsers, previews, and file type detection.
03-navy-blue-sky.svgResolution 256 x 144 37 Kpx
682 B SHA-256
6791490033e987b6e80fcc787fbb2cf76f5b871c9ec85da40401d9dbc1d72c3d
Nature of the Sky SVG
Nature of the Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 360 x 640. It can be used to test downloads, parsers, previews, and file type detection.
04-nature-sky.svgResolution 360 x 640 230 Kpx
688 B SHA-256
c706c311f90100386a398190a5c87ff625da1d18fdfcebd12d1755f171b5c07d
Sky Landscape SVG
Sky Landscape SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 640 x 360. It can be used to test downloads, parsers, previews, and file type detection.
05-sky-landscape.svgResolution 640 x 360 230 Kpx
685 B SHA-256
527425180e0137305b115b812658007ad012718772d3ceed6c4a6e1365801813
Starry Sky SVG
Starry Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 800 x 600. It can be used to test downloads, parsers, previews, and file type detection.
06-starry-sky.svgResolution 800 x 600 480 Kpx
683 B SHA-256
b9d8b6026d5115e46ef1131d7a8f5d6792208ef4d61302892c5ab7cb8f2ffb36
Blue Night Sky SVG
Blue Night Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 1024 x 768. It can be used to test downloads, parsers, previews, and file type detection.
07-blue-night-sky.svgResolution 1024 x 768 786 Kpx
692 B SHA-256
747fea89e431864c83b5a614dd885ca38574ddbb03f9f9b84334dc8113c6a984
Hibiscus Flower SVG
Hibiscus Flower SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 1280 x 720. It can be used to test downloads, parsers, previews, and file type detection.
08-hibiscus-flower.svgResolution 1280 x 720 922 Kpx
694 B SHA-256
c18770f0e9d692d815e99a89e6ab2f9beaaa3913847d1d5d60becbc677c56335
Arctic Sky SVG
Arctic Sky SVG is a Scalable Vector Graphics sample based on Wikimedia Commons, 1600 x 900. It can be used to test downloads, parsers, previews, and file type detection.
09-arctic-sky.svgResolution 1600 x 900 1.4 MP
690 B SHA-256
ccaca49cab5b5a22d4c4d581a2a38a88ca3ab561e44dde9cddaf4bf435375485
NASA Blue Marble Metadata SVG
NASA Blue Marble Metadata SVG is a Scalable Vector Graphics sample based on NASA Image and Video Library, 640 x 360. It can be used to test downloads, parsers, previews, and file type detection.
nasa-blue-marble-2012-east.svgResolution 640 x 360 230 Kpx
685 B SHA-256
ee1de3cc3ccb1639c12b616324893b8a33a2f28aa1239b624fd45493f339c0b1
Frequently asked questions
What is the magic number (file signature) of Scalable Vector Graphics?
Scalable Vector Graphics files begin with the byte signature 3C 73 76 67 ("<svg") or 3C 3F 78 6D 6C ("<?xml"). Detect the format by reading these leading bytes rather than trusting the file extension alone.
What is the MIME type of Scalable Vector Graphics?
The MIME type for Scalable Vector Graphics is image/svg+xml.
What file extension does Scalable Vector Graphics use?
Scalable Vector Graphics files use the .svg extension. The extension is a convention only and does not guarantee the file contents, so combine it with signature and structure checks.