BiznTools
Tools

Less scattered. More together.

Merge PDF files

Combine your documents. Keep the right pages.
Download one PDF, without uploading your files.

Created by BiznToolsFounder: Syed TalhaMethod checked

A few PDFs. One organized document.

Choose your files, put them in order, and merge.

or drag and drop them here

Up to 20 files · 25 MiB each · 50 MiB total · 200 pages

Made for static PDFs. Forms, signed, protected and annotated PDFs need a full PDF editor. Bookmarks, attachments, interactive links and accessibility tags are not carried over. What to know before merging ↓

Put the whole story
in one PDF.

Merge multiple PDF files into a single PDF, free on your device. Put a proposal before its appendix or an invoice before its supporting records. The documents are not sent to a server.

How to merge PDF files

  1. Choose your PDFs. Add files from your device. The tool checks each one before adding it to the list.
  2. Arrange the document. Move files up or down. Preview a file, keep all its pages or enter a selection such as 1-3, 5. Rotate a whole file if needed.
  3. Merge and download. Check the selected page count and filename, then create your PDF. Download it and review the final pages before sharing.

Order that matches your work

Files are combined from top to bottom. Within each file, your page selection sets the order. For example, 3, 1-2 puts page 3 before pages 1 and 2. Leave the field blank to keep every page in its original order.

A three-page proposal followed by a two-page appendix makes five pages. Keeping only proposal pages 1 and 3 and appendix page 2 makes three. The selection total above reflects exactly what will be included.

Local processing, clear limits

PDFs are read and combined in your browser. Their names and contents are not uploaded or sent to analytics, and no document history is saved. Clear all files releases the workspace; refreshing clears it too. Use Clear on a shared device because browser session restoration may retain a page.

Add up to 20 PDFs: 25 MiB per file, 50 MiB combined and 200 source pages. A complex PDF may still fail or take too long. Try fewer or smaller files if that happens.

What stays, what doesn’t

The merged file copies text, images and vector page content. Pages keep their size and crop. Your rotation is added to any existing rotation. Pages are not turned into screenshots, and images are not deliberately recompressed. File size may change when the PDF structure is rewritten.

This is a static-page merger. It does not preserve bookmarks, attached files, interactive links, document-level metadata or accessibility tags. Fillable forms, digitally signed PDFs, password-protected documents, portfolios and PDFs with annotations or document actions are not supported. Use a full PDF editor for those workflows. Keep the originals.

Combining pages is not redaction, certification or an accessibility conversion. Hidden content already inside a selected page may remain in its content stream. Review documents before sharing sensitive information.

Can I merge PDFs without uploading them?

Yes. This tool processes the PDF bytes locally after the page and its processing files have loaded. Downloading the result is also a local browser action. There is no cloud account or remote conversion service.

Will the merged PDF have a watermark?

No. No watermark, cover page or product branding is added. There is no signup step to download the result.

Can I combine PDFs of different sizes?

Yes. A portrait Letter page and a landscape A4 page keep their own dimensions in the combined file. This tool does not resize them onto a common sheet.

Why was a PDF rejected?

The file may be protected, incomplete, outside the size/page limits, or contain forms, annotations or actions this merger cannot safely carry over. If appropriate for your document, export an unsigned static copy from its original application. Do not discard the original signed or fillable version.

Can I combine Word documents or photos?

This tool accepts PDFs only. For JPEG photos or PNG screenshots, use JPG to PDF first, then download that PDF and add it here. Export Word documents as PDF from their original application. Files do not transfer automatically.

Processing approach: pdf-lib for structural page copying; Mozilla PDF.js for local page previews. Report a reproducible issue without sending private documents.