Scalable Vector Graphics (.svg)
W3C StandartinisScalable Vector Graphics (SVG) is an XML-based vector image format for two-dimensional graphics with support for interactivity, CSS styling, and animation.
Konvertuoti SVG į PNG
Nemokamas SVG į PNG konverteris naršyklėje. Konvertuokite failus akimirksniu savo įrenginyje.
Glaudinkite SVG internetu
100% privatus glaudinimas naršyklėje – failai niekada nepalieka jūsų įrenginio
Tikrinti ir metaduomenys
Operacinės sistemos ir failų analizatoriai atpažįsta SVG failus tikrindami pradinę dvejetainę baitų seką:
Baitų lygio antraštės parašas (magiškieji baitai)
Operacinės sistemos ir failų analizatoriai atpažįsta SVG failus tikrindami pradinę dvejetainę baitų seką:
ŠEŠIOLIKTAINIS PARAŠAS (POSLINKIS 0):
3C 73 76 67ASCII ATVAIZDAVIMAS: <svg
Standartizacija: W3C Recommendation (SVG 1.1 / SVG 2)
Techninės specifikacijos
| Konteinerio architektūra | XML-based text markup document defining 2D vector geometry |
| Glaudinimas | Gzip / Brotli text compression (SVGZ uses gzip compression) |
| Baitų seka (Endianness) | Not applicable (Text-based UTF-8 / UTF-16 character stream) |
| Spalvų erdvės | sRGB, CSS Color Module 4 (Display P3, lab, lch) |
| Kanalai ir struktūra | Unlimited resolution vector shapes, bezier curves, typography, and opacity masks |
| Maksimalūs matmenys | Resolution-independent (scales infinitely to any viewport without pixelation) |
| Skaidrumas | Full variable alpha transparency and CSS blend modes |
| Srautas ir progresyvusis įkėlimas | Progressive text stream parsing supported by browser XML parser |
Techninė palyginimo matrica: SVG vs konkurentai
| Techninis atributas | SVG (Dabartinis) | HTML5 Canvas | PNG | |
|---|---|---|---|---|
| Rendering Model | Retained mode vector DOM | Immediate mode bitmap canvas | Retained mode fixed page container | Raster pixel grid |
| Styling & CSS | Fully styleable via CSS classes and variables | Requires JavaScript canvas API redraws | No dynamic CSS styling | Fixed raster pixels |
| Infinite Scalability | Yes (mathematical vector curves) | Requires manual resolution scaling | Yes (vector elements) | No (pixelates when enlarged) |
| Interactivity | Native DOM events (hover, click, animations) | Requires manual hit detection math | Static document | Requires image map or canvas |
Dažni sugadinimo režimai ir šešioliktainio atkūrimo vadovas
⚠️ Browser displays XML Parsing Error: unclosed token or mismatched tag.
Pirminė priežastis: Malformed XML syntax, missing closing tags, or unescaped ampersands ('&' instead of '&').
Atkūrimas: Validate with an XML linter (xmllint file.svg) and correct unbalanced tags.
Saugumo analizė ir analizatoriaus atakos vektoriai
Because SVG is executable XML that supports '<script>' tags and external entities, it presents significant XSS and SSRF risks if untrusted SVGs are displayed.
Žinomi atakos vektoriai
- 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.
Geriausia apsaugos praktika: 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.
Istorinė kilmė ir svarbiausi etapai
Pagrindiniai privalumai
- 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.
Techniniai apribojimai ir trūkumai
- 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.
Įdomūs techniniai faktai
- 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.
Dažniausiai užduodami techniniai klausimai
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.
Susijusios SVG konvertavimo poros
Rasterize resolution-independent SVG vector graphics into high-resolution PNG bitmap assets.
Trace and vectorize high-contrast PNG bitmap images into scalable SVG paths.
Compile SVG vector graphics into scalable, printable PDF documents.
Extract vector graphics and paths from PDF pages into standalone SVG files.
Convert 2D CAD DXF drawings into web-viewable SVG vector diagrams.
Export SVG vector shapes into AutoCAD DXF format for CNC and CAD processing.