Combine multiple PDF files into a single document. Drag to reorder, then merge. Everything runs in your browser — nothing is uploaded.
Drop PDF files here or click to browse
Select multiple files at once or add them one by one
Merging PDF files is one of the most common document tasks, yet many tools require you to upload your files to a remote server or install desktop software. This tool does neither. It runs entirely in your browser using pdf-lib, an open-source JavaScript library. Your files never leave your device, which means your documents stay private regardless of how sensitive they are.
Combining scanned receipts or invoices into a single file for expense reports. Merging chapters or sections of a report that were authored separately. Joining cover letters with CVs before submitting a job application. Collating signed contract pages back into one document. Assembling presentation handouts from multiple slide decks exported as PDF.
Select or drag your PDF files into the dropzone above. They appear in a list where you can reorder them using the up and down buttons — the final merged file will follow this order. Click "Merge PDFs" and the tool reads each file, copies every page into a new PDF document, and produces the combined result. The output file is generated entirely on your machine; no data is sent anywhere. Once complete, click "Download" to save the merged PDF. There is no file size limit beyond what your browser can handle, though very large documents (hundreds of megabytes) may take a moment to process.
For best results, ensure your source PDFs are not password-protected, as encrypted files cannot be read by the browser. If you need to merge password-protected PDFs, remove the password first using a dedicated tool. The order of files in the list determines the page order in the output — drag or use the arrow buttons to rearrange before merging. You can add more files at any time by clicking the dropzone again or dragging additional files onto it.
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