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Schema Validator VS xmlvalid

Compare Schema Validator VS xmlvalid and see what are their differences

Schema Validator

Free schema markup validator for JSON-LD and Schema.org structured data. Validate schema markup for Google Rich Results compliance. Online schema validator tool.

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Rating
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

Rating
0 reviews
Pricing
Freemium $29 / Monthly (Pro)
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Alternatives Is it good?
KindProxy
KindProxy offers rotating residential and static ISP proxies across 198+ countries and regions. Featuring HTTP(S) and SOCKS5 support, sticky sessions, and city and ASN targeting, it's ideal for web scraping, SEO monitoring, market research, ad verifi sponsored

Which is more popular?

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

Base details

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

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

About Schema Validator and xmlvalid

In their own words, as submitted to SaaSHub.

Schema Validator
xmlvalid

No description of Schema Validator 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 5 features
xmlvalid 19 features
  • User-Friendly Interface
    Schema Validator offers an intuitive and easy-to-use interface that makes validating schemas straightforward even for beginners.
  • Support for Multiple Formats
    The tool supports various formats like JSON and XML, making it versatile for different data validation needs.
  • Real-Time Validation
    It provides real-time validation, allowing users to see errors and make corrections instantly.
  • Error Highlighting
    Schema Validator highlights errors within the data, making it easier to pinpoint the exact location and nature of each issue.
  • Comprehensive Documentation
    The platform offers extensive documentation that can help users navigate and utilize all available features.

Possible disadvantages

  • Limited Advanced Features
    For more complex validation needs, Schema Validator might lack some advanced features that are available in other specialized tools.
  • Dependency on Internet
    As an online tool, it requires internet access to function, which might not be suitable for local or offline projects.
  • Security Concerns
    Users might have concerns about uploading sensitive data onto an online platform for validation purposes.
  • No Offline Mode
    The absence of an offline version limits its usability in situations without internet connectivity.
  • Performance with Large Datasets
    The tool might experience performance issues or slower validation processes with very large datasets.
  • 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
xmlvalid

Overall verdict

  • Schema Validator is a solid, reliable tool for validating structured data and JSON schemas, offering fast and accurate results that help developers ensure their data conforms to defined standards.

Why this product is good

  • Provides quick and accurate validation of JSON and schema definitions
  • User-friendly interface that makes it easy to spot and fix errors
  • Supports common schema standards used across modern web and API development
  • Helps improve data quality and reduce integration bugs
  • Useful for both testing and production readiness checks

Recommended for

  • Developers working with JSON APIs and structured data
  • Teams building or consuming REST and GraphQL APIs
  • SEO specialists validating structured data markup for search engines
  • QA engineers verifying data integrity
  • Anyone needing to ensure their data conforms to a defined schema

No analysis of xmlvalid yet.

Videos

Walkthroughs and reviews on video.

Schema Validator 2 videos + Add
xmlvalid 0 videos + Add

Are You Nesting Schema Wrong? JSON-LD Schema Validator Tips for Nesting with @ID | Technical SEO

More videos

  • - Code Review: JSON schema validator

No xmlvalid videos yet. You could help us improve this page by suggesting one.

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
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 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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