FormatShiftMerge PDF Documents Online
Combine multiple PDF documents into a single file instantly and securely in your browser.
Drag multiple PDF files here
Action
Online PDF Merger
Merge multiple PDF documents into a single file with custom page reordering directly in browser.
Combines multiple separate PDF documents into a single file with custom file ordering. Runs locally in the browser via pdf-lib.
🎯 Exact Technical Outcome: What Happens to Your File
Native vector quality across all pages preserved
Mixed portrait and landscape orientations seamlessly preserved
Generates clean watermark-free PDF container
File size roughly equals the sum of input pages
How It Works
Add PDF Files
Upload two or more PDF files.
Reorder
Drag items to define the desired file sequence.
Merge
pdf-lib copies pages into a unified document structure.
Download
Save the merged PDF file.
When to Use
- ✓Merging contracts, annexes, and invoices into a single package
Related Tasks & Workflows
Frequently Asked Questions
Yes, portrait and landscape orientations are preserved.
In-Browser Local Processing
In-browser client processing — your files never leave your device.