Combine 2 PDF Pages Synchronous Side-by-Side

Combine corresponding pages of multiple PDFs horizontally. Sequentially combine corresponding pages of PDF A and PDF B side-by-side (A1+B1, A2+B2) to generate a new PDF with double-width pages. Great for document comparison and bilingual layouts.

Try these now PDFs:

Local Run

Does this online conversion service protect my privacy? Are the files I import safe?



Very safe, because your files never leave your device and are not uploaded. ImagesTool uses browser technology to achieve the conversion service that previously required uploading.

Everything happens only in your browser, 100% protecting your privacy.

You can do a test Convert once, then disconnect the device from the network, and convert again and you will find that everything is normal.

Layout

Resize & DPI

Modify page size and resolution

PDF N-up

Combine multiple pages onto one sheet

Crop PDF

Remove white margins or adjust page area

Rotate PDF

Adjust page display angle

Cut Page

Drag horizontal or vertical lines to freely cut PDF pages

Posterize PDF

Automatically divide a large page into multiple small pages

Combine into Single Page

Combine all PDF pages into a single page

Split Pages Vertically

Split from left to right into 2 pages, adjustable divider

Split Pages Horizontally

Split from top to bottom into 2 pages, adjustable divider

Stitch Vertically into Long Page

Stitch vertically from top to bottom into a continuous scrolling page

Stitch Horizontally into Single Page

Stitch horizontally from left to right into a side-by-side page

Sync & Stitch PDFs Horizontally

Stitch corresponding pages of PDF A and PDF B horizontally

Sync & Stitch PDFs Vertically

Stitch corresponding pages of PDF A and PDF B vertically

Free Combine PDF Pages Side-by-Side Stitching Tool


Combine PDF pages side-by-side horizontally

Redefine your document workflow with our advanced engine designed for Synchronous Side-by-Side Stitching. Unlike standard merging that simply appends files sequentially, this tool enables seamless Dual-File Canvas Stitching, merging corresponding pages horizontally onto a single, wider canvas. By locking the page-by-page synchronization—aligning Page 1 of Document A directly next to Page 1 of Document B—it delivers a precise Parallel Page Merging experience. This is the professional choice for Mirror/Comparison Stitching, making it ideal for translation reviews, version comparisons, and high-resolution side-by-side layouts without any loss in quality.


This tool runs entirely in your browser locally. No files are uploaded ; no registration or login required—100% private and secure.


  1. Import two or more PDF documents.
  2. Drag to change the position of the PDF.
  3. Click the 'Start' button.

    The purpose of arranging two PDFs horizontally.

  • Legal & Contract Comparison: Combine two versions of a document side-by-side for easy redline auditing.
  • Bilingual Alignment: Create parallel-text documents by stitching source and translated pages together.
  • Technical Documentation: Combine detailed schematics with explanatory text onto a single, wide-view page.

Frequently Asked Questions (QA)

Q: Does my data ever leave my device?

A: No. All 'combine' operations happen within your browser's memory. Your files are never sent to a server.

Q: Can I combine files of different sizes?

A: Yes, the tool automatically adjusts the canvas height to accommodate the tallest page during the stitching process.

Q: What is the maximum number of PDFs that can be displayed side-by-side at the same time?

A: There are no restrictions, but it is recommended to have no more than 5 PDFs.

Q: What happens if two PDFs side-by-side have different numbers of pages?

A: The PDF with more pages will be arranged side-by-side according to the rules until the last page.