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Schema Validator Extension VS xmlvalid

Compare Schema Validator Extension VS xmlvalid and see what are their differences

Schema Validator Extension

View, validate, export schema markup from any page with this extension

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0 reviews
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Alternatives Is it good?
xmlvalid

Validate XML and e-invoices up to 1 GB in your browser: XSD, DTD, RelaxNG and official business rules

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0 reviews
Pricing
Freemium $29 / Monthly (Pro)
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happySEO
Create ai humanized SEO content tailored for ecommerce and small businesses with HappySEO tools. From ai writer to keyword research and analyze tools. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

SEO Tools popularity
100% vs 0%
alternatives listed
81 vs 9

Base details

Website, pricing, platforms and company facts side by side.

Schema Validator Extension
xmlvalid
Website usergrowth.io xmlvalid.com
Pricing —
Freemium $29 / Monthly (Pro) Official pricing
Platforms —
Web REST API gRPC APISOAP API
Company — Startup from Ukraine · 1 - 9 employees · 2026
Listed in
Browser Extensions SEO Web Development SEO Tools +1
Developer Tools APIs CI/CD XML Data Validation Finance +3

About Schema Validator Extension and xmlvalid

In their own words, as submitted to SaaSHub.

Schema Validator Extension
xmlvalid

No description of Schema Validator Extension yet.

xmlvalid is an online XML validator built for production-size documents and e-invoicing. Validation XSD 1.0, DTD, RelaxNG (XML and compact syntax) 7,700+ Schematron business rules: EN 16931 (UBL and CII), Peppol BIS and PINT, XRechnung, ZUGFeRD / Factur-X, and national rules from France, Italy,...

Read more about xmlvalid

Features and specs

What each product offers, as listed by its team.

Schema Validator Extension 5 features
xmlvalid 19 features
  • Structured Data Validation
    The Schema Validator Extension helps users validate their structured data markup directly, ensuring that schema.org implementations are correct and properly formatted for search engines.
  • SEO Improvement
    By validating schema markup, the extension helps improve SEO performance by ensuring rich snippets and structured data are correctly implemented, potentially boosting search engine visibility.
  • Time-Saving
    The extension streamlines the process of checking schema markup by providing quick validation without needing to manually copy and paste code into external validation tools.
  • User-Friendly Interface
    Designed to be accessible for users of varying technical skill levels, making it easier for content creators and marketers to verify their structured data without deep coding knowledge.
  • Integration with Sprout SEO
    The extension is built to work alongside the Sprout SEO plugin ecosystem, providing a cohesive experience for users already leveraging Sprout SEO tools for their website optimization.

Possible disadvantages

  • Limited Standalone Use
    The extension appears to be designed primarily as a companion to Sprout SEO, which may limit its usefulness for users who do not already use the Sprout SEO plugin.
  • Niche Audience
    The tool caters to a relatively niche audience of web developers and SEO professionals who work with structured data, making it less relevant for general website owners.
  • Limited Public Information
    There is relatively limited publicly available documentation and reviews about this specific extension, making it harder for potential users to evaluate its full capabilities before adopting it.
  • Potential Cost
    As an extension tied to a commercial SEO product ecosystem, users may need to purchase additional licenses or subscriptions to access full functionality, adding to overall costs.
  • Dependency on Third-Party Ecosystem
    Being tied to the Sprout SEO ecosystem means users are dependent on the continued development and support of that platform, which could be a risk if the product is discontinued or changes direction.
  • Schema languages
    XSD 1.0, DTD, RelaxNG (XML and compact)
  • Business rules
    7,700+ Schematron rules (EN 16931, Peppol BIS and PINT, XRechnung, Factur-X, national CIUS) plus your own .sch
  • Schema catalog
    177 official schemas with all their include files
  • Country guides
    E-invoicing in 24 countries, the profile picked from the invoice automatically
  • Max File Size
    50 MB without an account, 1 GB with a free account (5 GB tested)
  • Batch validation
    A folder or .zip of up to 1,000 documents
  • Privacy
    Validated in the browser, nothing uploaded
  • Input methods
    Upload, paste, URL, or a folder or .zip of up to 1,000 documents
  • PDF invoices
    Factur-X, ZUGFeRD and ISDOC, with PDF/A (veraPDF) and PDF text checks
  • Error details
    Line and column, explanations for libxml2, Java (Xerces) and .NET messages
  • E-invoice Detection
    Profile picked automatically from the document
  • API
    REST (OpenAPI 3.1), SOAP, MCP server, SDKs for PHP, Laravel, Symfony, Python and JavaScript
  • CLI
    CLI (npm @xmlvalid/cli), GitHub Action, GitLab CI, pre-commit
  • URL monitors
    Alerts by email or webhook when a feed starts failing
  • Reports
    PDF, HTML, JSON export, share links
  • Dark Mode
  • Integrations
    n8n, Apify, Postman
  • Monitoring
    URL monitors with email and webhook alerts
  • Free Tools
    XML formatter, XPath tester, XSLT transformer, XML diff, XML to JSON / CSV, XSD generator, XSD to XML, e-invoice viewer

Analysis

An editorial look at what each product does well and who it suits.

Schema Validator Extension
xmlvalid

Overall verdict

  • The Schema Validator Extension from usergrowth.io is a solid, practical tool for anyone who needs to quickly inspect and validate structured data on web pages, offering convenience directly in the browser at no or low cost.

Why this product is good

  • Allows quick, in-browser validation of structured data (schema markup) without switching between multiple tools
  • Helps identify errors and warnings in JSON-LD, Microdata, and RDFa implementations
  • Saves time for SEO professionals by surfacing schema issues directly on the page being viewed
  • Lightweight browser extension that integrates into everyday workflows
  • Useful for verifying that rich results eligibility markup is correctly implemented

Recommended for

  • SEO specialists and consultants auditing structured data
  • Web developers implementing or debugging schema markup
  • Digital marketers who want to improve rich result eligibility
  • Agencies performing technical SEO audits for clients
  • Content and site owners validating their JSON-LD or Microdata

No analysis of xmlvalid yet.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Schema Validator Extension
xmlvalid
100% 100%
SEO Tools
0% 0%
0% 0%
Data Validation
100% 100%
100% 100%
SEO
0% 0%
0% 0%
Finance
100% 100%

Questions & Answers

As answered by people managing Schema Validator Extension and xmlvalid.

Which are the primary technologies used for building your product?

xmlvalid's answer:

  • Rust and libxml2 (validation engine), compiled to WebAssembly
  • SaxonJS (Schematron business rules)
  • veraPDF (PDF/A checks)
  • Laravel and Livewire (PHP)
  • Tailwind CSS
  • PostgreSQL, Redis, Meilisearch
  • Cloudflare

What makes your product unique?

xmlvalid's answer:

  • Schema validation and e-invoicing business rules in one place: XSD, DTD and RelaxNG, plus 7,700+ Schematron rules of EN 16931, Peppol BIS and PINT, XRechnung, Factur-X and national formats from France and Italy to Saudi Arabia, Mexico and Brazil
  • Built for large files: a streaming Rust engine (libxml2 compiled to WebAssembly) validates documents up to 1 GB in the browser with flat memory (5 GB tested)
  • 177 official schemas ready to use, and e-invoice profiles detected automatically from the document
  • E-invoice PDFs (Factur-X, ZUGFeRD, ISDOC) checked whole: the XML inside, PDF/A, and the PDF's text against the XML
  • Every error links to a page explaining why it fails and how to fix it, for libxml2, Java and .NET messages
  • The same checks in CI and integrations: REST API, SOAP, MCP server for AI agents, CLI, GitHub Action, n8n

Why should a person choose your product over its competitors?

xmlvalid's answer:

  • Desktop editors (XMLSpy, Oxygen) are powerful but expensive and need installing; xmlvalid works in the browser for free
  • Simple online validators check one schema and stop at a few MB; xmlvalid streams up to 1 GB and ships schemas with all their imports
  • E-invoice validators (KoSIT, Peppol testbeds) check one format each and have no CI tooling; xmlvalid covers many formats and countries, reads PDF invoices, and has an API, CLI and GitHub Action
  • Documents are validated in the browser and not uploaded

How would you describe the primary audience of your product?

xmlvalid's answer:

  • Developers and integrators building or receiving e-invoices (Peppol, XRechnung, Factur-X, FatturaPA, KSeF, ZATCA, CFDI, NF-e, UBL, CII)
  • ERP and accounting software vendors preparing for national e-invoicing mandates
  • Teams that exchange XML with partners: payments (ISO 20022), healthcare (HL7 CDA, FHIR), feeds and sitemaps
  • DevOps engineers who want XML checks in CI pipelines
  • Anyone who needs to validate a large XML file quickly without installing software

What's the story behind your product?

xmlvalid's answer:

xmlvalid is built and run by Oleksii Babintsev, a developer from Ukraine, so questions and bug reports reach the person who builds the engine. It started as a streaming validator for XML files too large for typical online tools, and grew into e-invoicing as countries made structured invoices mandatory: business rules for EN 16931, Peppol, XRechnung and national formats in 24 countries, PDF invoices, an API, CLI and GitHub Action for CI, and monitors for XML feeds. While building it, we found and fixed a slowdown in libxml2's validation of large files and contributed the fix upstream. It launched in October 2026

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