PDF Combine & Reorder

About PDF Combine & Reorder

PDF Combine & Reorder is the page-level companion to a normal merge tool: instead of combining whole files in file-order, it gives you a thumbnail grid of every page from every source PDF, lets you drag any thumbnail anywhere in the order, click × to drop pages you don't want, and finally produces a single combined PDF with pages in the exact sequence you arranged. This is essential when you are assembling a proposal from scattered sources — say, three pages from the contract draft, one from the master price sheet, two from the case-study deck — and want them in a custom order rather than file-order. Thumbnails are rendered locally via pdf.js and the final assembly uses pdf-lib's copyPages to preserve fonts, vector graphics, and embedded images at full quality. The whole pipeline runs in your browser, so confidential pages never upload anywhere.

Why use PDF Combine & Reorder

How to use PDF Combine & Reorder

1. Drop one or more PDFs onto the upload area — accepts as many files as you want.
2. Wait a moment while pdf.js renders thumbnails of every page from every uploaded file.
3. Drag any thumbnail to any position in the grid to set the final page order.
4. Click the × on any thumbnail to drop that page from the output.
5. Repeat until the grid shows your desired page sequence — the position number on each thumbnail updates live.
6. Click 'Save combined PDF' and pdf-lib produces a single combined PDF in your arranged order.

When to use PDF Combine & Reorder

• When assembling a client proposal from scattered pages of multiple source PDFs.
• When building a custom one-pager from select slides across a long deck and a research report.
• When reorganising scanned contract pages that came in the wrong order from the scanner.
• When mixing chapter summaries from multiple books into one reference PDF.
• When merging signed signature pages from different contracts into one evidence packet.
• When the file-level order of a normal merge isn't enough and you need page-level control.

Examples

Tips

• Drop all your source PDFs at once before starting to drag — the grid will include everything.
• Hold the thumbnail and drop it onto another thumbnail's position to insert before that page.
• If pages have very similar visuals, hover over the file-name label to confirm which source they came from.
• For very large multi-PDF assemblies (hundreds of pages), split the work into two or three runs to keep the UI snappy.
• Combine with PDF Compress afterwards if file size matters — many sources merged together can grow.

Frequently Asked Questions

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Glossary

Thumbnail

A small rendered preview of a PDF page, generated locally by pdf.js for visual selection and reorder.

Drag-and-Drop Reorder

An interaction where you grab an item and drop it at a new position to change its order in a list.

Page-Level Merge

Combining individual pages (rather than whole files) from multiple PDFs into one output document.

copyPages

A pdf-lib API that imports pages from a source PDF into a destination PDF while preserving content fidelity.

pdf.js

Mozilla's JavaScript PDF parser and renderer — used here to draw thumbnails of every page in the browser.

Lossless Merge

Combining pages without re-rendering or re-compressing, so output quality matches the source exactly.