Combine multiple PDF files into a single document in any order.
or drop your file here
Click the red Select PDF Files button or drag and drop multiple PDFs directly onto the page. You can select several files at once from your device, or add them one at a time. There is no limit on the number of files you can add.
PDFs are merged in the order they appear in the file list — top to bottom becomes first to last in the final document. Add your files in the sequence you want, or use the remove button next to any file and re-add it to change its position. Use Add more files to keep building your list.
Click Merge PDFs and your combined document downloads instantly. The result screen shows the total number of files merged, the total page count and the final file size. Everything happens in your browser — nothing is ever uploaded to a server.
Most job applications ask for a single PDF upload. If your CV and cover letter are separate files, merging them into one document before submitting is cleaner, more professional, and ensures the recruiter receives everything together in the right order without having to open multiple attachments.
Visa applications, grant submissions, loan applications and tender documents often require several supporting files — ID pages, bank statements, certificates, references. Merging them all into one ordered PDF makes the submission cleaner and reduces the risk of a document being missed or separated.
If different sections of a report, proposal or manual were created separately — perhaps by different people or in different software — merging them creates a single unified document with consistent page numbering that can be shared, printed or archived as one complete file.
Scanning a multi-page document often produces one PDF per page. Merging all the scanned pages into a single PDF turns a folder of separate files into one complete document that is easy to name, store, share and read in sequence.
Accountants, freelancers and business owners regularly need to send a batch of invoices or expense receipts together. Merging them into a single PDF means one attachment per email, one file per submission, and a clean record that is easy to reference and audit.
If you have exported individual slides, artwork pages or portfolio pieces as separate PDFs, merging them creates a single booklet-style document. This is useful for printed portfolios, client presentations and academic submissions where all material needs to be in one file.
You have two or more separate PDF files that need to become one document. Common situations: combining a CV and cover letter, assembling a set of scanned pages, bundling supporting documents for a submission, or joining chapters of a report created in separate files.
You have one large PDF that needs to be broken into smaller files. Common situations: extracting a single certificate from a multi-document bundle, pulling out specific pages to share with someone, or separating chapters from a book or manual into individual files for easier distribution.
A powerful workflow is to use Split PDF first to extract the exact pages you need from multiple source documents, then use Merge PDF to combine those extracted pages into a new, custom-ordered document. Both tools are free on SlashPDF and your files never leave your device at any step.
There is no fixed limit set by SlashPDF. You can merge as many PDFs as your device's available browser memory allows. In practice, most modern laptops and phones can handle dozens of files totalling several hundred megabytes without any issues. If you are working with very large files, merging in batches is a reliable workaround.
Yes. Files are merged in the order they appear in the file list, from top to bottom. Add your files in the sequence you want them to appear in the final document. To change the position of a file, click the remove button next to it and re-add it in the correct position. The Add more files button lets you keep adding files after the initial selection.
No. SlashPDF copies each page from the source PDFs directly into the merged output without re-encoding, re-rendering or compressing anything. All fonts, images, vector graphics, hyperlinks and formatting are preserved exactly as they are in the originals. The merged PDF is identical in quality to the source files.
No. SlashPDF merges your files entirely inside your browser using JavaScript and the PDF-lib library. Your files are never transmitted to any server at any point. This also means merging is fast — there is no upload wait time, just local processing on your own device.
PDFs with edit or print restrictions can usually still be merged. Fully encrypted PDFs that require a password to open cannot be processed until the password protection is removed, as SlashPDF cannot access the page content without it. If a file fails to merge, password protection is the most common reason.
No. SlashPDF reads your files in memory and writes a completely new merged output file. The original PDFs stored on your device are never touched, modified or deleted. All your source files remain intact exactly as they were after the merge is complete.
Yes. SlashPDF merges PDFs regardless of page size. If you combine an A4 document with a Letter-sized document, each page retains its original dimensions in the merged output. There is no forced standardisation of page sizes during the merge.
Yes. SlashPDF is fully responsive and works on iPhone, iPad, Android phones and tablets in any modern browser including Safari, Chrome and Firefox. Open slashpdf.com/merge-pdf/ in your browser, select your files from your device storage, and download the merged result — no app installation needed.