Merge PDFs

Drag and drop additional PDF files alongside your primary document and arrange them in the desired order. The merged output preserves each file's page sizes, fonts, images, and vector content. Use this to assemble multi-chapter books, combine front and back covers with interior pages, or consolidate separate job files into one press-ready PDF.

Best for:Multi-File AssemblyBook ChaptersJob ConsolidationCover + Interior
Open Merge PDFsTool page
Merge PDFs — Combines multiple PDF files into a single document: merge chapters, sections, or separate print jobs.

Merge PDFs

3 recipesTool page

Combines multiple PDF files into a single document: merge chapters, sections, or separate print jobs.

Drag and drop additional PDF files alongside your primary document and arrange them in the desired order. The merged output preserves each file's page sizes, fonts, images, and vector content. Use this to assemble multi-chapter books, combine front and back covers with interior pages, or consolidate separate job files into one press-ready PDF.

Best for:Multi-File AssemblyBook ChaptersJob ConsolidationCover + Interior
How It Works

Drag and drop additional PDF files alongside your primary document and arrange them in the desired order. The merged output preserves each file's page sizes, fonts, images, and vector content. Use this to assemble multi-chapter books, combine front and back covers with interior pages, or consolidate separate job files into one press-ready PDF.

File order:Files merge top-to-bottom as listed. Drag to reorder. The first file's pages appear first in the output, followed by each subsequent file.
Mixed page sizes:Different page sizes are preserved: a Letter-sized cover followed by A4 interior pages is perfectly valid. The output PDF contains each page at its original dimensions.
Merge PDFs — full app view showing options and imposed result

Merge PDFs tool applied. Options panel on the left, imposed result on the right. Click to zoom.

Options Guide
Primary Document

The base PDF file: additional files will be appended after this document.

This is the first file in the merged output. Its pages appear at the beginning. All subsequent files are added in the order they appear in the file list below.

Additional Files

Upload or drag extra PDFs to append after the primary document.

Files are merged in list order. Drag to rearrange. Each file retains its original page dimensions: mixed page sizes (e.g., Letter covers with A4 interior) are preserved as-is. Remove files by clicking the delete button next to each entry.

Summary

Shows the total page count and file order of the merged output.

Expert Tip

Merge multiple PDFs before imposition so they are treated as one continuous document. File order determines page order in every downstream operation, so double-check the sequence.

Merging files with different page sizes can cause unexpected scaling in layout tools. Resize all inputs to a common size first, or turn on auto-scale in the layout step.

Used in Recipes

Wedding Invitations

Premium wedding invitations with RSVP cards and envelopes imposed together.

Merge components
Gang on sheet
Add marks

Mixed Gang Run

Multiple different jobs ganged on a single press sheet for cost efficiency.

Merge jobs
Gang on sheet
Add marks

Multi-File Merge

Merge multiple source files into a single document for unified processing.

Merge files
Normalize size

Try Merge PDFs in your browser

PDF Press runs entirely client-side. Upload a PDF, apply Merge PDFs, and download the result — no upload to a server, no sign-up required.

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