How Do You Validate HTML Code?
Complete guide to validating HTML code for emails
Table of Contents
How Do You Validate HTML Code?
To validate HTML code for emails: use HTML validation tools that check HTML syntax, structure, and email client compatibility; upload HTML files or paste HTML code into validation tools; review validation reports showing errors, warnings, and recommendations; fix identified issues to ensure valid HTML structure; and test emails in multiple email clients to verify rendering.
Our HTML code validator checks HTML syntax, structure, email client compatibility, and provides detailed reports with errors and recommendations for fixing issues.
Regular HTML validation helps ensure email HTML renders correctly across email clients and prevents rendering issues.
Validation Methods
1. Online HTML Validators
Use online HTML validation tools that check HTML syntax, structure, and email client compatibility.
2. Email Client Testing
Test emails in multiple email clients to verify HTML renders correctly and identify compatibility issues.
3. HTML Validation Tools
Use specialized HTML validation tools that check both HTML validity and email client compatibility.
4. Manual Review
Manually review HTML code for syntax errors, missing tags, and unsupported features.
5. Automated Testing
Use automated testing tools that validate HTML as part of email production workflows.
HTML Validation Tools
Our HTML Validator
Our HTML code validator provides:
- HTML syntax validation
- Structure checking
- Email client compatibility checks
- Error identification
- Recommendations for fixes
- Detailed validation reports
Using the Validator
- Upload HTML files or paste HTML code
- Tool automatically validates HTML
- Review validation report
- Fix identified errors
- Re-validate to confirm fixes
Best Practices
Validate HTML regularly as part of your email production process to catch issues early.
Validation Checks
HTML validation checks for various issues:
Syntax Errors
- Missing closing tags
- Malformed attributes
- Invalid characters
- Syntax errors
Structure Issues
- Invalid nesting
- Broken structure
- Missing required elements
- Improper tag usage
Email Client Compatibility
- Unsupported tags
- Unsupported CSS features
- Email client-specific issues
- Compatibility warnings
Best Practices
- Table-based layouts
- Inline styles
- Email client compatibility
- Proper HTML structure
Fixing Validation Errors
1. Review Validation Report
Review validation reports from our HTML validator to identify errors and warnings.
2. Fix Syntax Errors
Fix HTML syntax errors, missing closing tags, and malformed attributes to ensure valid HTML structure.
3. Remove Unsupported Tags
Remove or replace unsupported HTML tags with email client-compatible alternatives.
4. Use Inline Styles
Convert external stylesheets and style tags to inline styles for email client compatibility.
5. Re-validate
Re-validate HTML after fixes to ensure all errors are resolved.
6. Test in Clients
Test emails in multiple email clients to verify HTML renders correctly after fixes.
