Compare Two PDFs Online Free — Spot the Differences

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VitePDF
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OCR PDF text search

Scans every page (including scanned/image-only pages with no selectable text) so you can search for a word or phrase.

PDF to Word

Extracts the real text where the PDF has it, and runs OCR automatically on scanned/image-only pages. Works best for simple, single-column documents — complex layouts, tables, and multi-column text won't be preserved exactly.

PDF to PowerPoint

Each page becomes one slide, rendered as a full-page image — layout, fonts, and graphics come out exactly as they look in the PDF. Runs entirely in your browser.

PDF to Excel

Reconstructs rows and columns from the PDF’s own text spacing, and runs OCR automatically on scanned/image-only pages. Works best for simple, clearly-aligned tables — free-form text near a table may get split oddly.

Word to PDF
PowerPoint to PDF
Excel to PDF
PDF to JPG

Each page becomes a .jpg image. Runs entirely in your browser — nothing is uploaded. Multiple pages are zipped together for download.

JPG to PDF
HTML to PDF

PDF to HTML

Produces one self-contained .html file — an image of each page with an invisible text layer on top, so it looks exactly like the PDF but the text stays selectable, searchable (Ctrl/Cmd+F), and copyable. Runs entirely in your browser.

Unlock PDF
Password protect PDF
Sign a PDF
Redact content
Compress PDF
Fill PDF forms
Crop / resize pages
PDF to plain text
Compare two PDFs

Original PDF

Click to choose, or drop it here

Revised PDF

Click to choose, or drop it here

Repair a PDF
Extract images from PDF
Edit PDF metadata
Read PDF aloud
Find & remove blank/duplicate pages
Combine pages for printing
Convert to grayscale
Bookmarks / table of contents

How to compare two PDFs online

  1. Choose your Original PDF and your Revised PDF.
  2. VitePDF renders every page from both and checks them pixel by pixel — this starts automatically once both files are chosen.
  3. The sidebar lists every page that differs, so you can jump straight to it instead of clicking through the whole document.
  4. Switch between Differences, Original, and Revised to see exactly what changed on any page.

Why use VitePDF

  • Catches any visual change — text edits, moved content, added or removed images, formatting tweaks — because it compares how the page actually looks, not just its underlying text.
  • Pages added or removed entirely are called out clearly, not silently skipped.
  • Everything happens in your browser — neither PDF is ever uploaded anywhere.

Frequently asked questions

Does this show exactly which words changed?

Not word-for-word — this is a visual comparison, so it highlights the regions of the page that look different rather than producing a text diff. It's very good at telling you where something changed; for exactly what changed in the text, switch to the Original/Revised tabs and read the highlighted area.

What if the two PDFs have a different number of pages?

VitePDF compares page 1 to page 1, page 2 to page 2, and so on. Any extra pages at the end of the longer document are shown as "only in Original" or "only in Revised" rather than compared against nothing.

Why does a page show as different when I can't see any change?

Very small rendering differences (slightly different fonts, anti-aliasing, or a barely-shifted line) can register as a small percentage of pixels differing. Use the Original/Revised tabs to compare directly if a highlighted difference looks larger than it should.

Is there a file size limit?

Files up to 280 MB are free — Premium removes that limit entirely.