PDF Output

Merge PDF Files Online

Select PDF files, review the listed order, and download the merged result as merged.pdf.

Select PDF files

    What This Tool Does

    This PDF merger combines the pages from selected PDF files into a new PDF document. After you select files, the page lists their names and enables the download button.

    The script creates a new PDF with pdf-lib, copies every page from each selected file, and downloads the result as merged.pdf.

    File Count and Order

    The file input accepts one or more .pdf files. The script does not set a fixed number of files or file-size limit, so very large PDFs or many PDFs may depend on browser and device memory.

    Files are merged in the order shown in the list. If you select more files later, they are added after the files already listed. The current page does not include drag-and-drop reordering controls.

    How to Merge PDFs

    1. Click Select PDF files and choose one or more PDF files.
    2. Review the file list. The list order is the merge order.
    3. Click Download Merged to create and save merged.pdf.
    4. Use Reset Inputs to reload the page and start over.

    Privacy and Processing

    The merge script reads selected files in the browser with file.arrayBuffer(), uses pdf-lib to copy pages into a new PDF, and creates a local Blob download. The script does not contain an upload request for selected PDFs.

    Error Handling

    The current script does not show a custom error message for unreadable, encrypted, or unsupported PDFs. If pdf-lib cannot load one of the selected files, the merge may stop and no merged file may download.

    Common Uses

    • Combining several PDF sections into one document.
    • Joining separate scanned PDF files in the order they are selected.
    • Creating one PDF from multiple PDF exports before sharing or archiving.

    Related Tools

    PDF Splitter

    Extract selected pages from a PDF after merging or before sharing.

    PDF Compressor

    Try reducing the file size of a merged PDF.

    PDF Page Remover

    Remove unwanted pages from a PDF.

    Image to PDF

    Create a PDF from image files before combining it with other PDFs.

    Frequently Asked Questions

    The file input allows one or more PDF files. The script does not set a fixed file-count limit, but very large files or many files may depend on browser and device memory.

    PDFs are merged in the order they appear in the file list. Files selected later are appended after files already listed.

    No. The current page lists selected files but does not include drag-and-drop reordering controls.

    The merged PDF downloads with the filename merged.pdf.

    The merge script reads selected files in the browser with file.arrayBuffer(), uses pdf-lib to copy pages into a new PDF, and creates a local Blob download. The script does not contain an upload request for selected PDFs.

    The current script does not show a custom error message for unreadable or unsupported PDFs. If pdf-lib cannot load a file, the merge may stop and no merged file may download.