PDF Merger
Combine PDF files online into one private browser-based document. Drag to reorder, then download instantly — no upload required.
Drop your PDF files here
or click to select files
Up to 5 PDF files · Files never leave your device
Merge PDFs in Seconds — No Upload Required
Combine multiple PDF files into a single document entirely in your browser. Drag to reorder, then download.
Everything You Need to Merge PDFs
From drag-and-drop upload to one-click download — no server, no waiting.
Drag-to-Reorder
Arrange your PDF files in any order before merging.
Drag the handle next to each file to reorder. Touch devices supported.
Page Count Preview
See how many pages each PDF contains before you merge.
Page counts are read locally — no data leaves your browser.
Custom Filename
Name your merged PDF before downloading.
Type any name — the .pdf extension is added automatically.
Up to 5 PDFs
Combine up to 5 PDF files in a single merge operation.
Run the tool multiple times to combine more files.
Preserves Content
Fonts, images, and embedded content are faithfully preserved.
Uses pdf-lib to copy pages with full fidelity.
Instant Download
The merged PDF downloads directly to your device.
No cloud storage, no email — straight to your downloads folder.
Inside the pipeline
How to Merge PDF Files
Upload your PDFs
Drop up to 5 PDF files into the upload area or click to select them from your device.
Reorder if needed
Drag the files into your desired merge order. The output PDF will follow this sequence.
Name your file
Enter a custom filename for your merged PDF. The .pdf extension is added automatically.
Merge and download
Click Merge PDFs and download your combined document instantly.
Why MacroKit PDF Merger?
Built for privacy-first document workflows.
Zero Upload
Your PDFs never leave your device. Merging happens entirely in your browser using pdf-lib.
No Queue
No waiting for server-side processing. Merge starts instantly when you click the button.
No Account
No signup, no email, no subscription. Open the tool and start merging immediately.
No Watermarks
Your merged PDF is clean. No branding, no watermarks, no hidden metadata added.
Works Offline
Once the page loads, you can merge PDFs without an internet connection.
Preserves Quality
pdf-lib copies pages with embedded fonts and images intact — no quality loss.
How PDF Merging Works
MacroKit uses pdf-lib — a pure JavaScript library — to merge your PDFs directly in your browser. No WASM, no server calls, no file uploads. Each PDF is read into memory, pages are copied in order, and the combined document is written as a Blob that downloads to your device.
▸ All processing happens in your browser tab. Closing the tab cancels any in-progress merge.
pdf-lib copies each page along with its embedded fonts, images, form fields, and annotations. The merged PDF is a faithful combination of your source documents with no quality reduction or format conversion.
MacroKit vs Other PDF Mergers
See how browser-based merging compares to typical online tools.
Frequently Asked Questions
Is this PDF merger really free?+
Are my PDF files uploaded to a server?+
How many PDFs can I merge at once?+
Will the merged PDF preserve fonts and images?+
Can I merge password-protected PDFs?+
What is the maximum file size?+
Can I reorder pages before merging?+
Does this work on mobile and tablets?+
More Free Tools
Privacy & Security
MacroKit PDF Merger runs entirely in your browser using pdf-lib. No PDF data is transmitted to any server. Files are read from your local device and the merged result downloads directly to your device.
Ready to merge your PDFs?
Drop your files above and get a merged PDF in seconds — no account, no upload.