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Private by design. Files are processed on your device and never uploaded.

Merge PDFs

Drag & drop PDFs here

or click to browse · 2–20 files, 100 MB each, 250 MB total

Features

Drag to reorder Add files in batches Original page sizes Custom filename No sign-up

Tips for clean merging

File order

Arrange files from top to bottom. The first file becomes the opening pages of your new document.

Page sizes

Documents with different page sizes can be merged safely. Each page keeps its exact original dimensions.

Protected files

Unlock password-protected files first before adding them to the queue.

Need to rearrange pages inside a single PDF? Split or extract them first, then merge in your desired order.

How to merge PDF files

  1. Choose your PDFs

    Select 2 to 20 PDF files up to 100 MB each, up to 250 MB total.

  2. Arrange the order

    Drag rows or use the arrow buttons to set the exact merge sequence.

  3. Merge and download

    Name your file if you like, select Merge PDFs, and download your combined document.

When should you merge PDFs?

Merging works best when combining related documents into one cohesive file—such as attaching receipts to an expense report, compiling book chapters, or uniting a resume and portfolio.

Every page retains its original vector sharpness, text, and embedded fonts without quality loss or recompression.

Local processing

Your PDFs are combined directly on your device. The source files and the final merged document are never uploaded or sent to a server.

Because the work happens locally, merge speed depends on your device's memory and total file size. For very large batches, combining files in smaller groups keeps processing smooth.

FAQ

Every page is added from top to bottom in the order shown. Drag a row or use its arrow controls before merging.
No. The PDFs are combined on your device and never sent to aliy.in.
You can combine 2–20 PDFs, up to 100 MB per file and 250 MB for the complete batch. The total limit keeps merging reliable across phones and computers.
No resizing or quality reduction is applied. Each page keeps its original size, rotation and visible content.
Password-protected PDFs must be unlocked before merging. Combining documents changes the file, so existing digital signatures will no longer be valid.