Merge PDF
Combine multiple PDF documents into a single file in your chosen order. Everything processes directly in your browser without file uploads or quality loss.
PDF (.pdf) · at least 2, at most 20 files
Tips
- Rearrange files in the list using the arrow buttons before combining.
- You can merge up to 20 PDF files at once.
- Remove password protection from encrypted files before adding them.
How to use it
- 1 Add two or more PDF files from your device.
- 2 Use the arrow buttons to arrange the files into your preferred order.
- 3 Generate and download your combined PDF document.
What you should know
Combining invoices, receipts, contracts, and supplementary reports into a unified document simplifies archiving and distribution. When merging PDFs, each source file can contain distinct page geometries, such as standard US Letter or A4 dimensions, alongside varying orientations. A proper document merger binds individual page object trees and cross-reference tables into a single structural hierarchy without rasterizing vector text or recompressing embedded images. This ensures that original vector paths, selectable typography, embedded font subsets, and image color profiles remain untouched while eliminating the fragmentation of sending dozens of standalone attachments.
This tool merges up to 20 separate PDF files directly inside your browser memory using client-side JavaScript APIs, keeping your sensitive documents private. You can arrange the document sequence using the reorder buttons prior to stitching. Because the tool preserves the original page streams without re-encoding, vector clarity and source resolution never degrade. Individual page sizes across mixed documents are fully maintained in the final output. However, encrypted or password-protected files cannot be parsed until decrypted, and root-level document metadata like author or creation tags is standardized upon export.
Frequently asked questions
Can I merge password-protected PDF files?
No. Encrypted documents cannot be decrypted or read in the browser without unlocking them first. You must remove password protection before adding them to the queue.
Does merging reduce image quality or flatten vector text?
No. The tool concatenates internal PDF object streams without rasterizing or re-compressing them. Embedded vector graphics, fonts, and bitmap resolutions remain identical to the original files.
Is there a limit on file size or page count?
You can combine up to 20 files simultaneously. While there is no hard file size cap, processing relies on your device browser memory, handling several hundred megabytes smoothly on standard hardware.
Guides
Articles and format references related to this tool.
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