Scalable Vector Graphics (.svg)

W3C Standarts

Scalable Vector Graphics (SVG) is an XML-based vector image format for two-dimensional graphics with support for interactivity, CSS styling, and animation.

Izgudrotājs: World Wide Web Consortium (W3C)Gads: 2001MIME: image/svg+xml

Konvertēt SVG uz PNG

Bezmaksas SVG uz PNG konvertētājs pārlūkprogrammā. Konvertējiet failus uzreiz savā ierīcē.

Saspiest SVG tiešsaistē

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Pārbaudīt un metadati

Operētājsistēmas un failu analizatori identificē SVG failus, pārbaudot sākotnējo bināro baitu secību:

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Baitu līmeņa galvenes paraksts (maģiskie baiti)

Operētājsistēmas un failu analizatori identificē SVG failus, pārbaudot sākotnējo bināro baitu secību:

HEKSADECIMĀLAIS PARAKSTS (NOBĪDE 0):

3C 73 76 67

ASCII ATTEIOLOJUMS: <svg

Standartizācija: W3C Recommendation (SVG 1.1 / SVG 2)

Tehniskās specifikācijas

Konteinera arhitektūraXML-based text markup document defining 2D vector geometry
SaspiešanaGzip / Brotli text compression (SVGZ uses gzip compression)
Baitu secībaNot applicable (Text-based UTF-8 / UTF-16 character stream)
Krāsu telpassRGB, CSS Color Module 4 (Display P3, lab, lch)
Kanāli un struktūraUnlimited resolution vector shapes, bezier curves, typography, and opacity masks
Maks. izmēriResolution-independent (scales infinitely to any viewport without pixelation)
CaurspīdīgumsFull variable alpha transparency and CSS blend modes
Straumēšana un progresīvā ielādeProgressive text stream parsing supported by browser XML parser

Tehniskā salīdzinājuma matrica: SVG pret konkurentiem

Tehniskais atribūtsSVG (Pašreizējais)HTML5 CanvasPDFPNG
Rendering ModelRetained mode vector DOMImmediate mode bitmap canvasRetained mode fixed page containerRaster pixel grid
Styling & CSSFully styleable via CSS classes and variablesRequires JavaScript canvas API redrawsNo dynamic CSS stylingFixed raster pixels
Infinite ScalabilityYes (mathematical vector curves)Requires manual resolution scalingYes (vector elements)No (pixelates when enlarged)
InteractivityNative DOM events (hover, click, animations)Requires manual hit detection mathStatic documentRequires image map or canvas

Biežākie bojājumu veidi un heksadecimālās atkopšanas ceļvedis

⚠️ Browser displays XML Parsing Error: unclosed token or mismatched tag.

Pamatcēlonis: Malformed XML syntax, missing closing tags, or unescaped ampersands ('&' instead of '&amp;').

Atkopšana: Validate with an XML linter (xmllint file.svg) and correct unbalanced tags.

Drošības analīze un parsētāja uzbrukuma vektori

Because SVG is executable XML that supports '<script>' tags and external entities, it presents significant XSS and SSRF risks if untrusted SVGs are displayed.

Zināmie uzbrukuma vektori

  • Stored Cross-Site Scripting (XSS) via embedded '<script>' tags or 'onload=' event handlers.
  • XML External Entity (XXE) attacks reading local server files when parsed on backend servers.
  • Billion Laughs XML entity expansion causing denial of service.

Aizsardzības labākā prakse: Always sanitize SVGs using DOMPurify before embedding, or serve SVGs with 'Content-Security-Policy: default-src 'none'' or as '<img>' tags which automatically disable scripts.

Vēsturiskā izcelsme un pavērsieni

2018W3C SVG 2 Candidate Recommendation integrates modern CSS styling.
2011SVG 1.1 (Second Edition) standardizes universal mobile and desktop browser support.
2001W3C publishes SVG 1.0 specification developed from VML and PGML proposals.

Galvenās priekšrocības un plusi

  • Infinite resolution independence: crisp lines and typography on any display or print scale.
  • Extremely small file size for logos, icons, and UI interface elements.
  • Fully scriptable and styleable via CSS and JavaScript inside the browser DOM.

Tehniskie ierobežojumi un mīnusi

  • Unsuitable for photographs or complex continuous-tone imagery.
  • Complex vector paths with thousands of nodes can cause CPU rendering lag and high battery drain.
  • XML nature allows embedded scripting, requiring strict sanitization before rendering untrusted uploads.

Interesanti tehniski fakti

  • Because SVG is plain XML text, compressing it with Gzip (producing an .svgz file) often reduces size by 70%–80%.
  • The viewBox attribute defines an abstract coordinate canvas that maps dynamically to physical screen pixels.

Bieži uzdotie tehniskie jautājumi

Can SVG files contain malicious code?

Yes. Because SVG is valid XML, it can contain embedded JavaScript ('<script>') that executes if the SVG is loaded directly in a browser or opened in an inline '<svg>' element. Serving SVGs via an '<img>' tag automatically neutralizes script execution.

When should I use SVG instead of PNG?

Use SVG for icons, logos, charts, illustrations, and typography where crisp scaling across all screen sizes and small file sizes are required. Use PNG or WebP for photographs.

Saistītie SVG konvertēšanas pāri

SVG uz PNG

Rasterize resolution-independent SVG vector graphics into high-resolution PNG bitmap assets.

PNG uz SVG

Trace and vectorize high-contrast PNG bitmap images into scalable SVG paths.

SVG uz PDF

Compile SVG vector graphics into scalable, printable PDF documents.

PDF uz SVG

Extract vector graphics and paths from PDF pages into standalone SVG files.

DXF uz SVG

Convert 2D CAD DXF drawings into web-viewable SVG vector diagrams.

SVG uz DXF

Export SVG vector shapes into AutoCAD DXF format for CNC and CAD processing.