Compare two PDFs
AI semantic diff (vs Draftable/Diffchecker char-level 80% false positives) + side-by-side redlining for FRCP Rule 26(a), M&A, FAR Part 15. Beats Adobe Pro $19.…
How it works
Upload both PDFs
Drop the original and the new version side by side.
AI compares pages
Our AI finds every text and visual difference, even layout shifts.
Review and export
Side-by-side view with diffs highlighted in red. Export the report as PDF.
Why choose iFillPDF
Side-by-side view
Differences highlighted in red, identical content in gray.
Semantic diff
AI ignores formatting noise (extra spaces, line breaks, font kerning, page-margin shifts) and surfaces only meaningful changes — typically 5-15 real diffs per 50-page contract vs 200-500 false positives Diffchecker / Draftable /…
Image diff
Spots image swaps and crops, not just text.
EU-hosted, GDPR
Your files are stored in Frankfurt (EU), AES-256 at rest.
Technical details
Spot every difference between two PDF versions — edited text, swapped images, layout shifts, signature blocks moved — with side-by-side redlining and AI semantic diff that ignores reformatting noise (extra spaces, line wraps, font kerning) where Draftable + Diffchecker char-level produce 80% false positives. Built for legal teams reviewing FRCP Rule 26(a) disclosures, M&A redlines, FAR Part 15 contract revisions, ICO UK GDPR audit trails. No Adobe Acrobat Pro $19.99/mo paywall (SERP-1, -4, -5), no Diffchecker $19/mo Pro, no Draftable $129/yr.
Go further with lifetime access
E-signature proof log, business templates, no watermark. $8.99, one payment, for life — no subscription.
Frequently asked questions
Is it really free?+
Yes — the free plan gives you everything with a watermark and 0 AI Deep Detect, then a one-time $8.99 Lifetime payment removes the watermark for good, and AI Deep Detect comes as one-time credit packs. No credit card required for the free plan.
Is my data safe?+
Yes — we host in Frankfurt (EU), AES-256 at rest. GDPR-compliant, never used to train third-party AI.
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