PDF24 Compare PDF
PDF24 Compare PDF: A free browser tool for straightforward PDF comparisons without registration or installation. Ranked #20 of 25 in Document Comparison Software by our editors (6.7/10); pricing: Free plan; best for simple free PDF-based comparisons.
At a glance
- Editor score6.7 / 10
- PricingFree plan
- Best forSimple free PDF-based comparisons
- Free planYes
- Paid fromFree
- PDF comparisonYes
- Founded2006 · Berlin, Germany
- Facts checked20 Sep 2026
Where it wins
- Free plan with no registration or time restrictions
- Marks changed, added, and removed text
- Offers side-by-side, overlay, and slider views
Where it doesn't
- Web-only access requires a browser
- Comparison workflow is centered on PDF files
- Limited integration and platform coverage
Our verdict on PDF24 Compare PDF
PDF24 Compare PDF is a browser-based tool for comparing two document versions. It marks changed, added, and removed text, while also providing side-by-side, overlay, and slider views for visual review. The free tool is suited to individuals and teams that need a quick way to inspect PDF changes without installing software or creating an account. Files that the system can convert to PDF are also supported, extending the workflow beyond documents already saved as PDFs.
The Free plan includes online PDF comparison, no registration, and no time restrictions. PDF24 says comparisons happen directly in the browser and that processed files are automatically deleted within one hour. That combination makes the product a practical choice for occasional document review where a browser workflow is acceptable. Its platform coverage is limited to the web, however, and the comparison experience remains focused on PDF-based work rather than a broader document-management environment.
The main strength is the choice of comparison views: users can inspect textual changes through markings or review page differences with side-by-side, overlay, and slider modes. The trade-off is narrower feature depth and integration coverage than a larger document comparison system. PDF24 Compare PDF fits users who prioritize a free, low-friction comparison tool for two document versions. Organizations seeking broader integrations, desktop deployment, or a more expansive document workflow should choose an alternative.
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PDF24 Compare PDF pricing
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PDF24 Compare PDF fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| PDF comparison | Yes |
| Office file comparison | Yes |
| Formatting changes | Not verified |
| Redline output | Not verified |
| Deployment | Web |
| Maximum file size | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Community, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan (source) |
| Website | tools.pdf24.org |
| Facts checked | 20 Sep 2026 |
Alternatives to PDF24 Compare PDF
- DiffcheckerA broad comparison toolkit with free access and a $15 monthly desktop tier.9.3
- Litera CompareA broad comparison toolkit for redlines, scanned PDFs, and server-side workflows.9.2
- UltraCompareA broad desktop comparison suite for technical teams that need three-way merges.9.0
See all PDF24 Compare PDF alternatives →
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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