Merge PDF

No. All merging happens entirely inside your browser using JavaScript (PDF-lib). Your files never leave your device — nothing is uploaded to any server. Your documents remain 100% private.

There is no hard limit on the number of files. You can merge as many PDFs as you need. Each individual file can be up to 50 MB. Very large batches may take slightly longer depending on your device's memory and speed.

Yes. After uploading, you can drag and drop the files to rearrange them in any order. The final merged PDF will follow the exact order shown in the list — top to bottom.

Password-protected (encrypted) PDFs cannot be read or processed by the browser without the password. You need to remove the password protection first using a PDF editor or Adobe Acrobat, then upload the unlocked file.

Yes. All pages from each file are included in full — text, images, fonts, layouts, hyperlinks, and annotations are preserved exactly as they appear in the original files. No content is altered or compressed during the merge.

Yes. The tool works on any modern browser — Chrome, Firefox, Safari, Edge — on both desktop and mobile devices. On mobile, tap the upload area to select files from your storage or cloud drive.

Large PDFs (especially those with many high-resolution images) require more memory. Try these steps: (1) Close other browser tabs to free up RAM. (2) Compress large individual PDFs first using our Compress PDF tool before merging. (3) Use a desktop browser for very large files.

Yes. After uploading your initial files, click the "Add More" button to append additional PDFs to the list. You can then drag to reorder all files before merging.

Each individual PDF file can be up to 50 MB. Since all processing is done in-browser, the practical limit depends on your device's available memory. For files larger than 50 MB, we recommend splitting or compressing them first.

Yes, completely free with no registration, no login, and no watermark added to the merged output. There are no usage limits.