Merge PDF

Combine multiple PDFs into one single Pdf.

Add PDFs to Merge

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Click to select or drag & drop

Select multiple files — reorder below

Output Settings

Output Filename

✅ Merge Complete

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Files merged

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Total pages

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Output size

How to Merge PDF Files

Follow these simple steps to combine your PDFs in seconds — no software required.

Upload Your PDF Files

Click the upload zone above or drag and drop your PDF files directly into it. You can select multiple files at once using Ctrl+Click (Windows) or Cmd+Click (Mac) in the file picker. There is no strict file-count limit, so feel free to add as many documents as you need to combine.
Arrange the Order

Once your files appear in the file list, drag each row up or down to set the exact sequence you want. The final merged PDF will follow the top-to-bottom order shown in the list — the topmost file becomes the first section of your output document.
Set the Output Filename

In the Output Settings card, type a meaningful name for your merged file. For example, you might use something like report-final, contract-bundle, or invoice-pack-2025. The tool automatically appends the .pdf extension, so there's no need to type it yourself.
Click "Merge PDFs"

Once at least two files are loaded, the Merge PDFs button becomes active. Click it to start the merging process. The operation runs entirely in your browser — your files are never sent to any server, ensuring complete privacy.
Download Your Merged PDF

After merging is complete, a results summary will appear showing the number of files combined, the total page count, and the final file size. Click the Download Merged PDF button to save the file directly to your device. You can then open it with any standard PDF viewer to verify the result.

💡 Pro Tips

For best results, ensure all source PDFs are not password-protected before uploading.
If pages appear out of order in the output, double-check the drag-and-drop list before merging.
Very large files (100 MB+) may take a few extra seconds depending on your device's processing power.
If you only need specific pages from a document, consider splitting the PDF first and then merging the extracted pages.

Common Use Cases

Merging PDFs is one of the most frequently needed document tasks across many industries.

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Contract Packages

Combine a cover letter, main agreement, and appendices into a single file to send to clients or legal teams.

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Invoice & Receipt Bundles

Consolidate monthly invoices or expense receipts into one PDF for accountants or tax submissions.

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Research & Reports

Merge chapters, data tables, and reference sections of a report into a single polished document.

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Academic Submissions

Join your thesis, bibliography, and supporting charts into one file for university portals that require a single upload.

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Real Estate Documents

Assemble property disclosures, inspection reports, and title documents before sharing with buyers or banks.

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Job Applications

Combine your résumé, cover letter, certifications, and portfolio into one convenient attachment.

Frequently Asked Questions

Everything you need to know about merging PDFs with this tool.

Yes, your data are safe — your files never leave your device. This tool processes everything locally in your web browser using the PDF-lib JavaScript library. No data is transmitted over the internet, stored on any server, or shared with third parties. This makes it a safe option even for sensitive documents such as legal contracts, medical records, or financial statements.
There is no hard limit on the number of files. In practice, your browser's available memory is the only constraint. Most modern devices handle dozens of files without issue. If you are combining a very large number of large PDFs (for example, 50 files each 50 MB), you may want to do it in batches to avoid browser slowdowns.
Yes. Merging PDFs with this tool is lossless — it simply concatenates the PDF page streams without re-encoding any content. Images retain their original resolution, fonts remain embedded as-is, and vector graphics stay crisp. The output is structurally identical to the source pages; no compression or quality reduction is applied.
Password-protected PDFs cannot be merged directly. You will need to remove the password protection first using a PDF unlock tool, then upload the unlocked versions here. This is a security limitation by design — reading an encrypted PDF without its password is not possible without the correct credentials.
This tool merges entire files in the order you arrange them in the list. It does not currently support reordering individual pages within a single source file. If you need custom page-level ordering from a single document, consider splitting that PDF into separate single-page files first, then merging everything in the exact sequence you need.
Yes. The tool is fully compatible with modern mobile browsers on iOS and Android. You can select files from your device's storage, cloud drives (such as Google Drive or iCloud), or even directly from your photo library if the file is saved there. Drag-and-drop reordering also works via touch on mobile screens.
There is no artificial file size restriction imposed by this tool. However, since merging happens in the browser, the total combined size of all files should comfortably fit within your browser's memory allocation. A practical guideline is to keep the total under 500 MB for smooth performance, though many users successfully process larger batches on desktop devices with sufficient RAM.
Internal hyperlinks within each original document are generally preserved in the merged output. However, bookmarks (outlines/table of contents entries) from individual source files may not be automatically merged into a unified bookmark tree. If a document navigation structure is important to you, you may need to add or edit bookmarks in the final file using a dedicated PDF editor after downloading.
Yes, this PDF merger is completely free. There are no sign-up requirements, no watermarks added to your output, no premium tiers, and no daily usage caps. You can merge as many PDFs as you need without any cost.
The tool works in all major modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, and Opera. For the best experience, we recommend keeping your browser updated to its latest version, as older versions may lack full support for the JavaScript APIs used during PDF processing.