Sponsor of the Day:
Jerkmate
https://validator.w3.org/docs/help.html
Help for The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://www.iban.com/sortware-api
SortWare: UK Bank Account Validation Service REST API Documentation
A specialized sortcode and account number payment validation service for the UK and Ireland
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https://www.sectigo.com/enterprise-support-validation-service
Enterprise Support & Validation Service | Sectigo® Official
Oct 30, 2025 - Leading provider of SSL/TLS certificates, automated certificate management and website security solutions. Trusted by the world’s largest brands for 20+ years.
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https://investing.io/validome/
Validome - A Free Validation Service for HTML and Accessibility - investing.io
Jul 31, 2023 - Validome allows Web Developers to check their website's syntax with a validation service for compliance with the current HTML specification. Validation for
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https://jigsaw.w3.org/css-validator/thanks.html
Acknowledgments - W3C CSS Validation Service
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https://jigsaw.w3.org/css-validator/
The W3C CSS Validation Service
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https://validator.w3.org/about.html
About the W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://validator.w3.org/todo.html
Development Roadmap for The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://validator.w3.org/feed/?ref=tiny-helpers
W3C Feed Validation Service, for Atom and RSS
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https://validator.w3.org/whatsnew.html
What's New at The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://validator.w3.org/docs/
Documentation Index for The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://it.iban.com/sortware-plus
SortWare Plus: Extended Sort code and Bank Account validation service
Il servizio SortWare Plus offre un rapporto completo con oltre 95 campi di dati dall'EISCD (Extended Industry Sort Codes Directory). Questo servizio è volto a...
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https://validator.w3.org/feed/whatsnew.html
W3C Feed Validation Service, for Atom and RSS
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https://validator.w3.org/detailed.html
The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://validator.w3.org/feed/about.html
About the W3C Feed Validation Service
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https://jigsaw.w3.org/css-validator/about.html
About the W3C CSS Validation Service
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https://www.iban.com/sortware
SortWare: Sort Code and Bank Account validation service
SortWare is a specialized service for validating bank account numbers in the United Kingdom and Ireland
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https://validator.w3.org/
The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
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https://validate-rcsb-2.wwpdb.org/
wwPDB Validation Service
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https://www.stibosystems.com/solution/connectivity-gallery/listing/experian
Email Validation Service - Experian | Stibo Systems
Stibo Systems MDM includes integration with Experian email validation.
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https://validate-rcsb-4.wwpdb.org/
wwPDB Validation Service
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https://www.iban.com/bic-validation-service
BIC Validation Service: Web & API
A powerful web API and mobile friendly interface to validate and search for all BIC and SWIFT codes.
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https://www.mailgun.com/resources/videos/email-verification-api/
How To Use Mailgun’s email validation API - Transactional Email API Service For Developers | Mailgun
Mar 19, 2026 - Mike, our Solutions Engineer, gives you a breakdown on how to use Mailgun's email validation API.
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https://www.mailgun.com/blog/deliverability/why-email-verification-is-vital-for-your-inbox/
Use email validation with Mailgun’s email validation tool - Transactional Email API Service For...
Aug 4, 2025 - Why should you use email validation in your inbox? Learn about its many benefits and how Mailgun’s email validation tool can help you get sending today.
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