Horn vs PDFix Desktop
Horn
horn.report
PDFix Desktop
pdfix.netSide by side
| Figure | Horn | PDFix Desktop |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 7 |
| Spec score · Accessibility Testing Software | 8.3 (#53) | 9.0 (#11) |
| Integrations | The repository documents GitHub Actions and GitLab CI examples, as well as SARIF output for GitHub Code Scanning. | PDFix announced PDF/UA validation and remediation actions becoming available in the Enfocus Switch App Store in 2026. |
| Purpose | Horn is an open-source PDF/UA checker based on the Matterhorn Protocol. | PDFix Desktop is a desktop tool for PDF accessibility remediation, auto-tagging, and PDF/UA and WCAG validation. |
Plans
PDFix Desktop
- Desktop Pro$599 a year
- Desktop Enterprise€1,000 a year
- Desktop LiteFree
- PDFix Desktop LiteFree
- Desktop Pro$599 a year
- PDFix Desktop Pro$599 a year
- PDFix Desktop Enterprise€1,000 a year
In their own words
PDFix Desktop
PDFix Desktop is a desktop application for PDF accessibility remediation, auto-tagging, and validation against PDF/UA and WCAG standards. It runs on Windows, macOS, and Linux and offers automated scans as well as manual review tools. Four auto-tagging methods are available: basic tagging, templates generated from preflight checks, AI-generated templates, and predefined layout templates. A visual Accessibility Panel lets users refine tables, headings, and alternative text. Its built-in veraPDF engine checks PDF/UA-1 and PDF/UA-2, WCAG 2.1 and 2.2, Section 508, and the European Accessibility Act; audit reports can be exported in HTML, XML, or JSON. The free download exposes all features, but saved PDFs may contain redacted content and a watermark. Desktop Pro costs $599 a year, and Desktop Enterprise costs €1,000 a year; Enterprise adds batch processing with layout templates. The product page says validation is local and documents are not uploaded to a server. PDFix cautions that human checks and intervention remain necessary for full compliance.