Merge PDF Files Free Online

Select 2 or 3 PDF files and receive a single merged document in seconds. Pages appear in the exact order you select the files — no account needed, no watermarks, files deleted immediately after download.

or drag & drop 2–3 PDF files here
2–3 files  •  20 MB total  •  Free forever
ⓘ Files merge in the order shown below. Select them in the sequence you want in the final PDF.
    No files stored
    Done in seconds
    No watermarks

    What This PDF Merger Does

    This merger combines between 2 and 3 PDF files into a single, continuous document. Pages from the first file come first, followed by the pages of the second file, then the third — exactly in the sequence you selected them. The entire process runs server-side using pdfunite, part of the poppler-utils suite. No re-rendering happens at any point: pages are joined at the PDF document structure level, so every page in the output is a structural copy of its source.

    The tool handles PDFs from any origin: Word exports, scanned documents, bank statements, image-to-PDF conversions, presentation slides — all merge identically. The only files that cannot be processed are PDFs with open-document password protection. If you need to convert a file to PDF before merging, use Word to PDF, Excel to PDF, PowerPoint to PDF or Image to PDF first, then combine the results here.

    Job applications

    Combine a cover letter, CV and certificates into one attachment rather than sending three separate files.

    Academic submissions

    Merge chapter or section PDFs into one complete document for university portals expecting a single upload.

    Invoices & receipts

    Bundle a month of invoices into one PDF for accounting reconciliation, expense claims or tax records.

    Legal & contract documents

    Merge agreements, appendices and cover sheets into one filed document for court submission or archiving.

    Tips for the Best Results

    Frequently Asked Questions

    Is this PDF merger completely free?

    Yes, completely free with no hidden conditions. There are no merge limits, no watermarks added to the output, and no account or payment information required at any stage. You can merge as many batches as you need, as often as you need. Convixy's tools are funded by advertising, not by paywalls or per-merge fees.

    The only constraints are technical ones: a maximum of three files per session and a combined total upload size of 20 MB. The 20 MB limit is more generous than the 15 MB limit on the converter tools specifically to accommodate the common use case of merging two or three already-converted PDFs into one deliverable document.

    How many PDF files can I merge at once, and what if I need to merge more?

    Between 2 and 3 files per session, with a combined total not exceeding 20 MB. If you need to combine more than 3 files, use a two-pass approach: merge your first 2 or 3 files, download the result, then upload that merged PDF alongside your remaining files for a second merge. Each pass operates at the structural level with no quality loss, so the final result is identical to a single-pass merge — there is no degradation from merging in multiple rounds.

    For very large sets of files — for instance, 12 monthly statements you need to combine into a year-end archive — split the work into batches of 3, merge each batch, then merge the resulting batch PDFs in a final pass. This keeps each upload well within the size limit and takes only a few minutes in total.

    Does the order of files matter and how do I control it?

    Yes — page order is entirely determined by the sequence in which you select your files. The merged PDF contains all pages of the first file, then all pages of the second, and so on. A numbered preview list appears on screen as soon as you select your files so you can confirm the sequence before uploading. If the order is wrong, clear your selection and start again with the files in the correct sequence.

    The most reliable way to guarantee a specific order across different operating systems and file pickers is to prefix filenames numerically before selecting: 01-intro.pdf, 02-report.pdf, 03-appendix.pdf. When you select files with Ctrl+A or Command+A, most operating systems sort them alphabetically, so numbered prefixes give you precise control over the final page sequence regardless of which device or browser you are using.

    Does merging reduce quality or alter the formatting of my pages?

    No. The merge is entirely lossless. Pages are joined at the PDF document structure level with no re-rendering, resampling or recompression at any stage. Images keep their original resolution and compression scheme, text stays fully searchable and selectable exactly as it was in the source files, embedded fonts are preserved intact, and page dimensions stay exactly as they were in each source file.

    Hyperlinks within each source file are carried through into the merged document. Bookmarks (the navigation tree in the left panel of PDF viewers) within individual files are also preserved, though the bookmark trees from multiple files are not automatically consolidated into a single unified table of contents spanning the whole document. For most everyday uses — job applications, report submissions, invoice batches — this is not a concern.

    What is the file size limit and what if my files are too large?

    The combined upload limit is 20 MB across all files in one session. The output PDF also has a 20 MB cap. If your PDFs are large due to embedded high-resolution images or scanned pages at high DPI, run each through Compress PDF first — this typically reduces image-heavy files by 40–85% with no visible quality difference at normal screen viewing sizes. After compression, the files should combine well within the 20 MB limit.

    If the merged output itself would exceed 20 MB even after compressing the source files individually, try merging in two passes: merge the first two compressed files, compress the result again, then merge that with the third file. For PDFs that are inherently very large — for instance, high-resolution scanned books — splitting each into chapters with Split PDF before merging the specific sections you need is the most effective approach.

    Can I merge PDFs created from different sources?

    Yes. This tool merges PDFs regardless of how they were originally created — a Word export, a scanned page, a bank statement, a PowerPoint slide deck, an image converted to PDF, a spreadsheet export, or a government form can all be combined in one pass. The merger operates at the document structure level and does not depend on the PDF's content or origin.

    Convert any non-PDF source files first using the appropriate converter: Word to PDF for DOC/DOCX files, Excel to PDF for XLS/XLSX, PowerPoint to PDF for PPT/PPTX, CSV to PDF for data tables, or Image to PDF for JPG, PNG and WEBP files. Once everything is in PDF format, merge the results here.

    Why might a merge fail?

    The most common cause is a password-protected PDF. Files that require a password to open cannot be processed because the merge engine needs full read access to the document's internal page structure. If you attempt to upload a password-protected file, the merge will fail and an error message will explain the reason. Remove the password protection in your original PDF software, then upload the unlocked file.

    Other causes include corrupted files with invalid internal PDF structure and files saved in non-standard or heavily proprietary PDF variants. PDFs with owner-level restrictions — which limit printing, copying or editing but do not require a password to open — can usually be merged without any issue. If a merge fails on a file that opens normally in a PDF viewer, try opening it in your viewer and using File → Print → Save as PDF to regenerate a clean copy before uploading.

    Are my files private and secure?

    Yes. All file transfers use encrypted HTTPS connections, so your documents are protected in transit. Once your merged PDF is generated and downloaded, all uploaded source files and the merged output are automatically and permanently deleted from our servers — typically within the same session and always within one hour of upload. No manual deletion is required on your part.

    We do not read, store, index, analyse or share your document content under any circumstances. No account is required, so there is no user profile or upload history associated with your files and no email address or personal information is collected. This tool is safe to use with confidential job applications, legal contracts, financial statements, medical records and any other sensitive documents.

    Do I need any software installed?

    Nothing at all. Convixy runs entirely in your browser and merging happens on our servers using pdfunite from the poppler-utils suite. You do not need Adobe Acrobat, a local PDF editor or any desktop application installed on your device. The tool works on every modern browser — Chrome, Firefox, Safari and Edge — across Windows, macOS, Linux, Android and iOS.

    This makes it particularly useful on managed corporate devices where installing software is restricted, on shared or borrowed computers, or when you need a quick merge on a phone or tablet. Open the browser, select your files, and download the merged PDF in seconds with no software installation required and nothing left on your device.

    What can I do with the PDF after merging?

    Once you have a single merged PDF, Convixy has tools for the most common next steps. To reduce its size before emailing or uploading to a portal with size restrictions, use Compress PDF — it significantly reduces size with no visible quality loss for most documents. To extract only specific pages or sections from the combined result, use Split PDF. If you realise you merged the wrong files or in the wrong order, simply go back to merge again — the process is instant and free every time.

    For the complete PDF workflow: convert your source files to PDF using the appropriate converter, merge them here, compress the result, and then split out any sections you need to share separately. All tools are free, require no account and delete your files immediately after download.