Page alignment
Inserted and removed pages stay explicit so later matching pages do not cascade into false changes.
Private PDF review
Compare two PDFs without uploading either document.
Compare two PDFs on this device using aligned side-by-side, overlay, and visual difference views plus native-text references. You can review inserted, removed, wording, and layout-only changes, then download a source-referenced comparison report. Results depend on successful page alignment and available text; scanned pages, complex graphics, or moved content may require visual review.
Document 1
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Document 2
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Separate evidence
Pixel, native wording, and layout-only changes remain distinct and retain source page references.
Bounded privacy
Up to 100 pages and 100 MB per PDF, processed on this device with cancellation and no document upload.
Source files, pixels, and text stay local
On-device processing renders bounded page pixels, extracts positioned native text, aligns pages, and calculates differences. PdfEditorOnlineFree does not upload document content, page images, extracted text, or the generated report.
Evidence, not a verdict
Visual, wording, and layout changes remain separate.
Pixel evidence can find formatting and image changes. Native-text evidence can cite changed wording. Position evidence can identify text that moved without changing. Automated summaries may still miss subtle formatting, semantic, or legal significance, so human review remains the authority.
Page alignment
Inserted and removed pages remain explicit so later pages can align to their matching source references.
Pixel differences
Difference view highlights content unique to either document while keeping below-threshold content visible.
Positioned native text
Wording evidence retains Document 1 and Document 2 page references instead of flattening the whole file into one string.
Sensitivity controls
Tune pixel sensitivity and the position tolerance used to classify unchanged wording as layout-only.
Honest scanned-page limit
Image-only pages can be compared visually. Scanned semantic comparison explicitly requires the future OCR feature.
Validated report
The searchable comparison report is generated, reopened, and structurally inspected locally before download.
Continue your workflow
Related tools
These available PdfEditorOnlineFree tools are connected to compare pdfs by the tool catalog.