Merge PDF
Combine multiple PDF files into one document
At a glance
- Use this page to merge files quickly with a guided workflow.
- Accepted input: .pdf.
- Output: downloadable files generated in-browser for supported workflows.
- Upload Choose your file
- Process Runs locally
- Download Save result
Drop your files here
or tap to browse · accepts .pdf
Runs in your browser. No file uploads for supported tools.
Best on desktop for 100MB+ files · mobile recommended under ~100MB.
How local processing works
- Your PDF is processed in your browser using local JavaScript libraries.
- PDFWhisk does not upload your file to a processing server for supported tools.
- Only normal page assets load from the site (HTML/CSS/JS), not your document contents.
Selected files
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Security & privacy detailsHow this tool helps
Combine multiple PDF documents into a single file in seconds. Simply drag and drop your PDFs, arrange them in the order you want, and merge. Our tool preserves all formatting, bookmarks, and links from the original documents. Perfect for combining reports, contracts, invoices, or any documents that need to be in one file. Reorder pages by dragging them into position before merging. All processing happens in your browser - your sensitive documents never touch our servers. Merges up to 10 PDFs at a time on the free plan (more with Pro) and produces a clean, properly structured output document. Use it when you need to merge PDFs on iPhone, compress after merging, split a merged file later.
Best for
How it works
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1
Add PDF files
Select all PDFs you want to combine in one document.
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2
Set the order
Reorder files using the mobile-friendly controls or drag-and-drop on desktop.
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3
Merge and download
Run the merge and download one combined PDF.
More files today? Free covers 3 tasks a day and files up to 50MB. For unlimited tasks and bigger files, Pro passes start at £1 for 24 hours. One-off payment, no subscription, and your files still stay on your device.
Frequently asked questions
How many PDFs can I merge at once?
Free merges combine up to 10 files at a time, each up to 50MB. PDFWhisk Pro removes those caps, so the practical limit is your device's memory.
Can I reorder the files before merging?
Yes. After adding your files, drag and drop them to rearrange the order. The merged PDF will follow your custom sequence.
Will formatting be preserved?
Yes. Text, images, fonts, links, and page layouts are all preserved exactly as they appear in the original files. The merged PDF is a faithful combination of all source documents.
Can I merge password-protected PDFs?
You'll need to enter the password for each protected PDF before merging. Once unlocked, they can be combined like any other PDF.
What's the maximum file size?
Since everything runs in your browser, the combined size of all files should ideally be under 200MB for smooth performance. Most users merge files well within this range.
What to do next
Chain tools together for a complete workflow.
Popular searches for this tool
Intent-specific pages for common real-world tasks (upload limits, email attachments, iPhone workflows, and privacy-first processing).