Free Merge PDF —
Combine PDFs Instantly

Upload multiple PDF files, arrange them in the order you want, and merge them into one document. Everything runs in your browser. No uploads. No account. No cost.

100% Private — No Server Drag to Reorder Instant Download

Drop PDF files here or click to browse

Select 2 or more PDF files · Merged locally in your browser · No upload

Your PDFs are processed entirely on your device — never sent to any server.

Drag rows to reorder — the PDF will be merged in this order
    No PDF files selected yet

    All processing happens in your browser. Your PDFs never leave your device.

    Complete Guide: How to Merge PDF Files Online

    Merging multiple PDF files into one is one of the most common document tasks — combining scanned pages, assembling reports, or packaging a contract with attachments. Our free browser-based tool does it instantly without uploading anything to a server.

    Why Merge PDF Files?

    • Easier sharing — Send one file instead of multiple attachments in emails or messaging apps.
    • Professional documents — Combine a cover letter, CV, and portfolio into one clean PDF.
    • Organised archives — Merge monthly reports or invoices into a single annual document.
    • Submission requirements — Many online portals and government forms require a single PDF upload.

    How the Merge Works

    This tool uses PDF.js to render each page of every uploaded PDF into a canvas, then uses jsPDF to assemble all rendered pages into a single output PDF. This is a fully browser-based process — no server, no network, no data transfer.

    How to Use This Tool — Step by Step

    1. Upload: Click the drop zone or drag your PDF files in. You can select multiple files at once.

    2. Reorder: Drag the rows in the file list to set the order. The final PDF will follow this sequence exactly.

    3. Merge & Download: Click the button. Your merged PDF downloads instantly.

    Privacy & Security

    All processing happens entirely in your browser using JavaScript. No data is ever sent to any server. You can disconnect from the internet after the page loads and the tool will still work perfectly.

    Yes — 100% free, forever. No account, no signup, no watermarks, and no limits on the number of files or pages.
    No. All merging happens locally in your browser using PDF.js and jsPDF. Your files never leave your device.
    You can merge as many PDF files as you need. There is no limit on the number of files or total pages.
    Yes. After uploading, drag and drop the rows in the file list to set the exact order. The merged PDF will follow this sequence.
    The tool re-renders each page at high resolution (1.5x scale) before merging. The output quality is excellent for screen viewing and standard printing. For archival-quality output at full original resolution, a native PDF library would be required.

    Found this useful? Share it

    Share on Facebook Share on X Share on WhatsApp Share on Telegram

    Useful Resources

    PDF.js — Mozilla PDF Format — Wikipedia