Merge PDFs
Combine multiple PDF files into one, directly in your browser.
Why use this tool
01Upload multiple PDFs, arrange them in the order you want, and merge into a single file — all processed locally in your browser. No server uploads and no server-side file size cap.
Combine multiple PDFs into a single file without uploading anything. Drag the files into the order you want, then merge.
Use it to stitch monthly reports together, bundle a cover letter with an attachment, or assemble a multi-source proposal before sharing — all in your browser, no server round-trip.
How to use
02Quick checks before you copy
03Confirm the input is the format you intended.
Scan the result before using it in a document, URL, config, or message.
Copy only the output you need.
Use Cases
Merge quarterly financial reports, department summaries, and appendices into a single PDF for stakeholder distribution.
Combine a cover letter, pricing sheet, portfolio samples, and terms into one polished PDF to send to clients.
Merge multiple papers, references, and supplementary materials into a single document for submission or review.
Combine lecture slides, readings, and assignments into one student-facing PDF before each module.
Merge all project specs, meeting notes, and final deliverables into a single archive PDF for long-term storage.
Combine contracts, addendums, and signature pages into one complete document ready for submission.
Tips & Tricks
- 01Order files before merging
Arrange your files in the exact sequence you want before clicking Merge. The tool respects the order you set, and reordering afterward requires re-merging.
- 02Compress after merging if size matters
Merged PDFs can be large. Run the result through the PDF Compress tool to reduce file size — especially useful before emailing.
- 03Use PDF Reorder for page-level control
If you need to interleave individual pages from different documents rather than append whole files, use the PDF Reorder tool instead.
- 04Your files never leave your browser
All merging happens locally. You can safely merge confidential documents, contracts, or medical records without privacy concerns.
- 05Check the final page count
After merging, verify the total page count matches the sum of your input files to confirm all pages were included.
FAQ
04Are my files uploaded to a server when I merge PDFs?
No. All merging happens locally in your browser. Your files are never sent to any server, making this tool safe for confidential documents.
Is there a limit to how many PDFs I can merge at once?
There is no enforced limit. You can merge as many files as your browser can handle. For very large batches, merging in groups of 10–20 files at a time is recommended for reliability.
Will merging PDFs reduce the quality of images or text?
No. The tool combines pages without re-encoding content. Images, fonts, and formatting are preserved exactly as they appear in the originals.
Can I merge a PDF with owner restrictions?
If the file opens but blocks printing, copying, or editing, use PDF Password to remove owner restriction flags before merging. PDF Password does not remove an open password required to view encrypted PDFs.
How do I control the final page order?
Add files in any order, then reorder them before merging. The final PDF follows the order shown in the workspace, so review the list before downloading.
Can I merge PDFs on my phone or tablet?
Yes. The tool works on any modern browser including Safari on iOS and Chrome on Android.
Does the merged PDF have any watermarks or branding?
Never. The output is a clean PDF with no watermarks, no ToolGrid branding, and no modifications beyond combining your pages.
What's the maximum file size I can merge?
There is no artificial file size cap. The practical limit depends on your device's available memory. Most modern devices handle files up to several hundred megabytes without issues.
Related tools
03Compress PDF→
Re-save a PDF with compact object streams to reduce structural overhead when possible.
Add PDF Watermark→
Stamp a text watermark on every page of a PDF.
Reorder PDF Pages→
Rearrange pages in a PDF.