SVG Validator — Check Your SVG for Errors
Validate SVG code against W3C standards and catch rendering errors before they reach production.
Drop your image here
Supports PNG, JPG, BMP, WEBP up to 5MB
Why Validate SVG?
SVG is XML — a single syntax error causes the entire file to fail silently. Validation catches problems that aren't always obvious visually.
- Unclosed tags cause rendering failures in strict XML parsers
- Invalid attribute values may render incorrectly in some browsers
- Missing namespace declarations cause errors in XML processing tools
- Accessibility attributes can be checked for correctness
How to Validate SVG
Multiple tools validate SVG files.
- W3C Markup Validator (validator.w3.org): paste SVG as text, validates XML and SVG-specific rules
- VS Code + SVGO lint: real-time SVG error highlighting in the editor
- xmllint (command line): xmllint --noout --valid yourfile.svg
- Browser DevTools: open SVG, check Console for parsing errors
Common SVG Validation Errors
The most frequent SVG validation issues and their fixes.
| Error | Cause | Fix |
|---|---|---|
| Stray end tag | Mismatched opening/closing tags | Close all opened elements |
| Invalid attribute value | Wrong data type for attribute | Check SVG spec for allowed values |
| Duplicate id | Same id on multiple elements | Make ids unique |
| Missing xmlns | No SVG namespace declaration | Add xmlns='http://www.w3.org/2000/svg' |
| Invalid color value | Unsupported color format | Use hex, rgb(), or named colors |
Frequently Asked Questions
Does valid SVG guarantee it renders correctly in all browsers?
No — valid SVG may still render differently across browsers for unsupported features. Validation catches syntax errors; cross-browser testing catches rendering differences.
Can I validate an inline SVG in HTML?
Extract the SVG code from the HTML, paste as a standalone file, and validate. Or use the W3C HTML validator on the full page — it validates embedded SVG.
Does SVG validation check accessibility?
Partially. The W3C validator doesn't check ARIA attributes or alt text semantics. Use axe DevTools or WAVE for accessibility-specific validation.
What is the SVG specification?
SVG 1.1 Second Edition is the stable W3C Recommendation (2011). SVG 2 is in development with some features supported in modern browsers. Most production SVG uses SVG 1.1 features.
My SVG passes validation but doesn't render — why?
Validation checks syntax; rendering depends on browser support. Common non-validation issues: unsupported filter effects, CSS property incompatibilities, or CORS errors for external resources.
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