Compare PDF
Compare PDF pairs pages by page number and shows additions and removals in selectable text. Synchronized scrolling helps you inspect the rendered pages alongside those changes.
Privacy and offline checks
Document processing runs locally in supported PDFForge workflows. This panel is a diagnostic view; it cannot prove that no data left the device.
Observed resource activity
0 observations in this page session · 0 need inspection
Resource timing is unavailable in this browser. Use the independent checks below.
Page timing and the active service worker report different surfaces and may observe the same request. Worker activity can be incomplete; WebSockets, request bodies and extensions are outside this view. The latest 60 sanitized observations stay in memory only. URLs, filenames, query strings, document content and byte counts are not recorded here.
Verify independently in DevTools
- Use a clean browser profile and synthetic documents. Open Network in DevTools and enable Preserve log.
- Prepare offline below. Switch Network to Offline, then reload the saved workspace and select a new file.
- Inspect, redact, run output checks and download. Inspect failed requests and request payloads, including worker requests. A same-site request can still transmit data.
- Inspect Application or Storage. Cache Storage should contain public app assets and setup records only. Document recovery and content telemetry are disabled; recipe settings are saved only after opt-in.
Offline readiness
Full workspace not prepared for offline use
English OCR not prepared for offline use
Prepare while connected to save the workspace, tools, fonts and workers. English OCR is optional. Only public app assets are saved; documents, outputs and passwords are excluded. Browser storage can be cleared or evicted. Check saved assets before disconnecting and prepare again after an app update.
Checking saved app assets…
Open saved workspaceReady for local work · One heavy job at a time in this tab
Original PDF
Drop your PDF file here, or browse
Supports standard PDF documents • Up to 50 MB
Revised PDF
Drop your PDF file here, or browse
Supports standard PDF documents • Up to 50 MB
Comparison options
Compare matching page numbers using selectable text. Pages are not automatically aligned when pages are inserted or reordered. Up to 200 pages and 50 MB per PDF.
Text checks cannot establish visual identity. Images, annotations, forms, hidden content, and scanned text are not compared. No OCR runs in this tool. Review the previews manually.
Private by design. Document processing runs in this browser. PDFForge has no document upload API.
How it works
How Compare PDF works
Compare PDF pairs pages by page number and shows additions and removals in selectable text. Synchronized scrolling helps you inspect the rendered pages alongside those changes.
Guided steps
How to use Compare PDF
- 1Select the original and revised PDF.
- 2Compare the documents locally.
- 3Use shared page navigation and synchronized scrolling to inspect each pair.
- 4Review text changes and visually check scanned pages, images, and layout.
In this tab
What stays in this browser
The file stays in this tab.
- What this tool reads
- Two PDFs, their rendered pages, and selectable text. Comparison results stay in this tab.
- What the download contains
- An on-screen comparison with page and text changes. It does not modify the source PDFs or automatically compare scanned text, images, or hidden objects.
Questions
Compare PDF FAQs
Are either of my PDFs uploaded?
No. Rendering and text comparison run locally in this tab, using self-hosted assets.
Does this compare scanned text or every visual difference?
The automatic diff compares selectable text. Image-only pages need visual review. It does not automatically detect changes to pictures, signatures, hidden objects, or formatting.
How are inserted pages handled?
Pages are paired by number. Extra pages at the end are marked added or removed. Inserting a page in the middle can shift later comparisons; review neighboring page pairs.
Continue locally
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