Upload PDF files
Choose your PDF file from the device or drop it into the upload area.
Free online PDF tool
Merge PDF Online
Combine multiple PDF files into a single document directly in your browser.
Browser ProcessingNo UploadPrivacy FirstLocal ConversionFast
Drop your file here.
Drop your file here or choose files. Choose a PDF file from your device. Processing happens in your browser.
FreeSecureWorks in your browser
Visual guide
What this tool does
Use the preview as a mental model: choose files, adjust only the settings that matter, then download the final document or image output. The workflow is designed to stay simple even with many pages.
Simple workflow
How it works
Preview and choose
Check the file summary, pages or options before starting the operation.
Merge files
Merge PDF runs in the browser and prepares the new file locally.
Download one PDF
Download a single PDF that keeps every page in the order you chose.
Practical reasons
Why use Merge PDF Online?
Keep the workflow simple
Combine related PDFs into one document so recipients do not need to open several attachments.
Private by design
The workflow runs locally in your browser, which keeps everyday documents private and avoids an upload queue.
Works anywhere
Use the tool from modern desktop and mobile browsers without installing a PDF app.
Built for everyday files
Features
Browser processing
The file is processed on your device with client-side PDF libraries.
Clear preview
Review the file, pages or selected options before downloading the result.
No account required
Use the tool without sign-in, subscriptions or trial walls.
Responsive layout
The upload, options and download states remain usable on small screens.
Clean file names
Downloaded files use readable names instead of generic output.pdf labels.
Error messages
Invalid files, unsupported states and empty selections are reported clearly.
Perfect for
Common use cases
Students
Prepare class documents, notes and shared materials without desktop software.
Business
Handle receipts, contracts, reports and client documents in a quick browser workflow.
Administration
Prepare files for portals, email attachments and formal submissions.
Design review
Adjust visual documents, proofs or exported PDF pages before sharing them.
Personal documents
Work with tickets, scans, confirmations and archives from your own device.
Mobile tasks
Complete small PDF fixes from a phone or tablet when you are away from a computer.
Real workflow preview
See the tool before you use it
These are real LiftPDF interface captures, not decorative mockups. They show how the page preview and final action state look during a normal browser workflow.
The file list shows each PDF, page count and order before the final PDF is created.
The merged PDF is generated in the browser and can be downloaded immediately.
Common problems
Quick answers before editing your PDF
Why merging can fail
A merge can fail if one file is encrypted, damaged, invalid or too large for the device to process comfortably.
Open each PDF first and unlock protected files with the correct password before merging.
Why the merged PDF is large
The final PDF contains the pages from every source file. Image-heavy scans and photos can make the output large.
Remove unnecessary pages before merging and use Compress PDF after merging if the result is too big.
How to control the final order
The file list controls the final document sequence. Move PDFs up or down before exporting.
If pages inside one PDF are out of order, merge first and then use Reorder Pages on the combined document.
How to merge images with PDFs
Merge PDF accepts PDF files. Convert JPG, PNG or WEBP images with Images to PDF first, then merge that PDF with other documents.
Complete guide
Best practices before you convert
Prepare files before merging
The most important merge setting is order. Place cover pages, forms, supporting documents and appendices exactly as they should appear in the final PDF.
If a file includes pages you do not need, use Delete Pages or Extract Pages first. That keeps the merged document cleaner and easier to review.
Local merging
LiftPDF copies pages into a new PDF directly in your browser. This is useful for contracts, invoices, scans and personal records that should not be uploaded just to combine files.
Privacy comparison
LiftPDF vs typical online converters
TopicLiftPDFTypical converter
Browser processingFiles stay on your deviceUsually uploaded first
PrivacyNo document storageDepends on the provider
SpeedStarts immediately after selectionCan wait for upload queues
AccountNo account requiredOften limited by sign-in or trials
Keep working
Useful next tools
Merge PDF files online
LiftPDF lets you merge PDFs in the order you choose. Add files, reorder them, remove anything you do not need and download one combined PDF without using a backend API.
FAQ
Can I merge multiple PDFs at once?
Yes. Upload several PDF files and they will be merged into one document.
Does the order matter?
Yes. The final PDF follows the order shown in the file list. Use the up and down buttons to reorder files before merging.
Are my PDFs uploaded to LiftPDF?
No. The merge runs client-side in your browser with pdf-lib.
Can I see how many pages each PDF has?
Yes. After upload, LiftPDF reads each PDF in your browser and shows the page count, file size and a first-page preview before you merge.
Can I drag and drop PDFs to change the order?
Yes. On desktop, you can drag PDF cards into the order you want. You can also use the move up and move down buttons, which work well on mobile and with a keyboard.
Will the quality change after merging?
No. LiftPDF copies the original PDF pages into a new document and preserves the page content, dimensions and quality.
Can I merge password-protected PDFs?
Password-protected PDFs must be unlocked first. If a selected PDF is encrypted, LiftPDF will show an error instead of creating a broken merged file.
Does Merge PDF work on mobile?
Yes. The tool works in modern mobile browsers. On smaller screens, use the move buttons to adjust file order before merging.
Learn more about this task
Related Tools
Keep working with tools that match this PDF workflow.
Split PDF
Extract selected pages or split every page.
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Compress PDF
Rebuild PDFs with safe browser-side compression.
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Rotate PDF
Rotate individual pages or all pages at once.
FreeSecureBrowser
Delete Pages
Remove unwanted pages from a PDF.
FreeSecureBrowser
Extract Pages
Save selected PDF pages into a new document.
FreeSecureBrowser
Reorder Pages
Rearrange PDF pages before downloading.
FreeSecureBrowser
Private by design
Your files stay in your browser
LiftPDF is built around local browser processing. For the available tools, files are read by your browser, processed on your device and downloaded back to you.
Browser Processing
The current tools process files in your browser using client-side PDF and image libraries.
No File Upload
Your selected documents do not need to be sent to a LiftPDF conversion server.
Private by Design
Sensitive files stay on your device during conversion, editing and export.
Secure Conversion
Protect and Unlock PDF use QPDF compiled to WebAssembly for local encryption tasks.
No server upload
How browser processing works
Your device
You choose files in your browser.
Local processing
PDF.js, pdf-lib or QPDF WASM runs the task locally.
Download
The result is created for you to save.
LiftPDF tools are designed so the selected files are read by the browser and processed on your device. The current tools do not require a document upload API.