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Reference edition 2026.46

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Responsive Tool vs XSDHub

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Responsive Tool compared with XSDHub
DetailResponsive Tool logo Responsive ToolXSDHub logo XSDHub
What it doesFree responsive website checker for mobile, tablet and desktop XML validation and schema tools for developers
StageNot given Not given
FoundedNot given Not given
Based inNot given NL
Pricing modelFree Freemium
PricingNot given Free: unlimited individual XML checks, local validation, no account required. Pro: US$19/month (US$190/year), batch 25 files, 10 cloud projects, 10 schemas, 300 validations + 250 invoices/day. Team: US$49/month (US$490/year), batch 100 files, 50 shared projects, 100 schemas, 5 seats, 1,000 validatio
Key features
  • Test multiple device viewports simultaneously
  • Real CSS viewport rendering
  • Share setup links
  • Custom pixel width testing
  • No installation required
  • Sync scroll across panes
  • Browser-based with no account needed
  • Free local XML syntax and formatting checks
  • XSD 1.0 validation with local imports and includes
  • Optional XSD 1.1 and ISO Schematron XPath 1.0 server validation
  • Cloud schema projects with version control
  • Batch validation up to 25 files (Pro) or 100 files (Team)
  • API access with daily quotas
  • Public HTTPS schema import and structural comparison
  • EN 16931 and XRechnung invoice validation
  • Multi-format invoice validation (Factur-X, KSeF, RO e-Factura, HR-CIUS)
What makes it different
  • Compare multiple real device widths side by side instead of switching one at a time
  • Faster than DevTools for checking several device sizes at once
  • Entirely browser-based with no setup, signup or download
  • Built and maintained by one developer in the open
  • Browser-based validation runs locally without uploading documents by default
  • Explicit server processing consent required for any upload
  • Comprehensive e-invoice validation across six European formats
  • Built with AI assistance and documented with primary references
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check1 no change since last check
Trust Flow (Majestic)10
Citation Flow (Majestic)254
Referring domains (Majestic)141

4 details filled in for both companies.

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