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Drop PDF files here or browse
Select 2 or more PDFs · Up to 100 MB total · Drag to reorder after upload
What Is PDF Merging?
PDF merging combines two or more PDF files into a single document. The pages from each source PDF are appended in order, so you end up with one file that contains everything. It's one of the most common PDF operations — useful for combining invoices, chapters of a report, scanned pages, or separate documents into a cohesive whole.
How to Use This Tool
- Upload 2 or more PDFs — drag and drop, or click to browse. You can also click "Add More Files" later.
- Reorder them — drag each row up or down to change the order. Or use the arrow buttons.
- Set the output filename — the field updates automatically but you can edit it.
- Click "Merge PDFs" — the combined file downloads automatically.
Reordering Files
The order of the files determines the page order in the merged PDF. There are several ways to reorder:
- Drag and drop — grab the dots on the left side of any row and drag it to a new position.
- Arrow buttons — use the ↑ and ↓ buttons to move a file up or down one position.
- Reverse Order — flips the entire list, useful when files were added in the wrong direction.
- Sort by Name — alphabetizes files by filename. Ideal when combining numbered chapters.
Options Explained
- Output filename — the name of the downloaded file. Change it to anything you like.
- Add bookmarks — creates a PDF outline entry for each source file, so readers can jump to a specific document within the merged PDF.
- Strip metadata — removes title, author, and dates from each source PDF so the merged file starts clean.
What Gets Preserved
- Page content — all text, images, vectors, and formatting are preserved exactly.
- Page size and orientation — each page keeps its original dimensions. Mixed page sizes work fine.
- Internal links — hyperlinks within each source PDF still work.
- Fonts and graphics — embedded fonts and drawings are kept intact.
- Annotations — comments, highlights, and form fields are preserved.
Common Use Cases
- Combining invoices — merge monthly bills into a single annual statement.
- Report assembly — bring together chapters written by different people.
- Scan consolidation — combine multiple scans of a single document.
- Portfolio creation — merge individual project PDFs into one portfolio.
- Contract bundles — combine a main contract with its appendices and exhibits.
- Study materials — merge lecture notes, slides, and readings into one file.
- Ebook compilation — combine separate chapters into a single volume.
Limits and Considerations
- Maximum 100 MB total — larger sets may slow the browser. For very large merges, use a desktop PDF tool.
- Encrypted PDFs — password-protected PDFs cannot be merged unless you unlock them first.
- Corrupted files — the tool will report the error and skip the file.
- Fillable forms — form fields are preserved but their appearance in the merged file depends on the viewer.
Why Merge in the Browser?
- Privacy — your files never leave your device. No uploads, no servers, no logs.
- Speed — merging large PDFs is much faster locally than via upload/download.
- No limits — no daily quotas, no watermarks, no accounts.
- Offline capable — works without an internet connection after the page loads.
- Free — no hidden fees or premium tiers.
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Privacy Note
Everything runs in your browser using pdf-lib (a pure JavaScript PDF library). Your PDFs are never uploaded to a server, and the merged file is generated entirely in memory until you download it. Close the tab and everything is gone.