Merge & Combine PDF Files

Stitch multiple PDF documents together into a single file with custom ordering and selective page extraction, processed entirely in your browser.

PDFs merged successfully
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Invoices & Expenses

Combine monthly billing statements, receipts, and expense PDFs into a single, clean packet for your accountant.

Single expense packet →
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Contracts & Legal

Stitch master agreements, schedules, and signed signature addenda into one authoritative legal document.

Preserve vector text →
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Job Applications

Merge your CV, cover letter, references, and portfolio samples into one unified PDF required by employers.

Custom page ranges →
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100% In-Browser Privacy

Bank statements and confidential IDs are processed purely in local browser RAM. Never transmitted to a cloud server.

Zero cloud uploads →

1 How to Merge Multiple PDFs

  1. • Upload PDFs: Drag & drop two or more PDF files into the upload area or paste them with Ctrl+V.
  2. • Reorder Sequence: Use the ↑ and ↓ buttons on each document card to set your desired order.
  3. • Filter Pages (Optional): Enter page subsets (e.g. 1-4, 7) to exclude blank cover sheets.
  4. • Compile & Download: Click Merge PDFs into One File to assemble and save your stitched document instantly.

★ PDF Merging Pro Tips

  • ✔ 100% Lossless vector text: Text remains fully selectable, searchable, and crystal sharp without bitmap downsampling.
  • ✔ Custom page selection: Use commas and hyphens in the "Pages" field (e.g. 1-3, 5) to drop unwanted pages.
  • ✔ No file size or count caps: Because merging executes in local device memory, you can join dozens of documents with zero server timeouts.
  • ✔ Queue more files anytime: Click Add More PDFs to append additional documents to your list before clicking Merge.
⚙️ Under the Hood: Binary PDF Architecture & Specifications
Show technical details

BWTools manipulates PDF object dictionaries directly in browser memory using typed binary ArrayBuffer structures via pdf-lib without intermediate canvas rasterisation.

Vector typography, embedded TrueType/OpenType font tables, high-resolution raster streams, and vector paths are copied losslessly into the target document object tree. This preserves searchable text layers, form metadata, and vector line weights while maintaining minimal RAM overhead.

Document Type Supported Standards Selective Pages Vector Fidelity Privacy Guarantee
Standard PDF (.pdf) PDF 1.0 – 2.0 Custom Ranges Supported 100% Lossless Vector 100% In-Browser
Scanned Documents Bitmap Payloads Custom Ranges Supported Original DPI Preserved 100% In-Browser
Form Templates AcroForms / Static Custom Ranges Supported Native Tree Flattening 100% In-Browser

❓ Frequently Asked Questions

How do I extract only specific pages before merging?

Next to each queued document card, you will find a "Pages:" input box. You can enter individual page numbers separated by commas or ranges separated by hyphens (e.g. 1-3, 5, 8-12). Only the specified pages will be included in the merged file.

Will merging affect my document's text clarity or file size?

No. The tool does not re-compress, downsample, or convert your pages to images. Vector text streams and embedded images are directly copied at 100% original fidelity without quality degradation.

Are my PDF files uploaded to any remote server?

Never. All PDF compiling and binary transformations execute 100% in your device's browser memory using client-side JavaScript. Your files never touch an external server or remote queue.