PDF Tools

Merge PDF

Combine multiple PDF files into one document for free. Arrange your files in the order you want, merge them in your browser, and download your PDF.

Merge PDFs

Your PDF files are merged in your browser. They are not uploaded to our servers.

Drop PDF files here or choose from your device

Add two or more PDFs. Files are checked and processed locally; nothing is uploaded.

Limits: 20 files, 25 MB each, 100 MB combined, and 300 pages total.

Selected documents (0)

No PDFs selected yet.

Choose two or more PDFs to begin.

How to merge PDFs

  1. Select or drop at least two PDF files. Each file is checked in your browser before it joins the list.
  2. Review the filenames and page counts. Use Move up or Move down to set the document order; pages in each PDF keep their original sequence.
  3. Choose Merge PDFs, then download the completed file. The selected source files are not changed.

Page order, size, and selectable text

Documents are added in the order shown. Each copied page keeps its source page size, orientation, rotation, and PDF page content where supported. Text is copied as PDF page content rather than rasterized, so it generally remains selectable when it was selectable in the source.

Limits and encrypted files

To manage browser memory, this version accepts up to 20 PDFs, 25 MB per file, 100 MB combined, and 300 pages total. Empty, incomplete, corrupt, unsupported, or encrypted/password-protected documents are rejected. Passwords are not requested or bypassed.

PDF features and signatures

Merging rewrites a new document. Bookmarks, annotations, forms, attachments, metadata, and other interactive or advanced features may not transfer perfectly. A digital signature on a source document should not be expected to remain valid on the merged file. This tool does not sanitize files or remove malware.

Browser processing and privacy

PDF files are read and merged locally using browser JavaScript. The tool does not upload documents to a ToolsForToday application server, put their contents in browser storage, or add filenames and document details to Analytics page views. Large merges use your device memory; keep the tab open while processing.

Merge PDF help

  1. 1Add at least two valid, unencrypted PDFs within the displayed file and page limits.
  2. 2Arrange the document list with the accessible Move up and Move down controls.
  3. 3Merge the documents and download toolsfortoday-merged.pdf when processing completes.

Help and limitations

  • This tool preserves page content and page geometry where supported, but does not promise exact preservation of every advanced PDF feature.
  • The merged result is a new file. Do not rely on source digital signatures remaining valid after merging.
  • PDFs are not rasterized, sanitized, scanned for malware, or uploaded to a server.

Frequently asked questions

Can I add more PDFs after making the first selection?
Yes. Choose Add PDFs again or drop more files; valid new documents are added to the end of the current list.
Can I change the page order?
You can reorder whole documents before merging. All pages in each selected document stay together in their original internal order.
Are my original PDFs changed?
No. The tool reads the selected files and creates a separate merged download.
Why might a PDF fail?
The file may be incomplete, corrupt, unsupported, password-protected, or over the per-file or total limits. Encrypted PDFs are not decrypted by this tool.
Will bookmarks, forms, annotations, and signatures all be preserved?
Not necessarily. These features may not transfer unchanged, and source digital signatures should be treated as invalid on the new merged document.
Are the PDFs uploaded or scanned for malware?
No. PDF content is processed in your browser and is not uploaded to ToolsForToday. This tool does not sanitize files or provide malware scanning.

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