Compare PDF versions by meaning, not page by page.
Select two or more text-based PDFs in your browser. Aelipsis finds material changes in dates, amounts, scope, and obligations, then shows the exact excerpts behind each finding.
Find the changes worth reviewing.
What to compare
Add two to six text-based PDFs, or combine a PDF with a browser page or pasted note. This works for revised proposals, policies, agreements, schedules, and terms.
What to inspect
- Changed numbers, dates, names, thresholds, and deadlines.
- Added or removed responsibilities, exceptions, and exclusions.
- Conflicting language across more than two versions.
- Evidence excerpts that let you verify the finding in context.
What it is not
Aelipsis is not a pixel-level redline and does not claim every formatting edit. It is designed to surface differences that can change a decision, with provenance visible.
A worked example
If version one says cancellation requires 30 days’ notice and version two says 60 days, a text diff can show the changed number. A meaning-focused review should also classify it as a changed obligation and keep both passages available for verification.
Current limits
PDFs need extractable text. Scanned pages require OCR before comparison, and complex layouts can reduce extraction quality. Aelipsis identifies incomplete coverage rather than presenting it as complete.