無料オンラインPDF分割・結合

Yes. After adding files, drag and drop them to change the merge order. You can also expand each PDF to drag individual pages into different positions in the final merged document.

Browser-side processing is limited by device memory. Files up to 50 MB each merge reliably on modern devices. For very large PDFs (100+ MB), use a desktop tool like Adobe Acrobat or the free PDF24 desktop app.

No. This tool uses PDF.js and pdf-lib to process PDFs entirely in your browser. Your files never leave your device — suitable for confidential documents.

Yes. In Split mode, enter a single page number (e.g. page 5) to extract just that page as a standalone PDF.

Basic merging concatenates pages without merging bookmark structures. The output PDF will not have a combined TOC. For advanced bookmark merging, use Adobe Acrobat Pro or a dedicated PDF editor.

Yes, the PDF分割・結合 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

複数のPDFを1つに結合するか、PDFをページごとに分割します。アップロード不要。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The PDF分割・結合 runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The PDF分割・結合 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the PDF分割・結合 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

Yes. The PDF分割・結合 is fully responsive and works on all modern smartphones and tablets. No app download is required — open your mobile browser, navigate to the tool, and use it exactly as you would on a desktop.

Copy the result text or take a screenshot to share via message, email, or social media. The tool URL can also be bookmarked and shared directly — the PDF分割・結合 works for anyone with a modern browser, no account required.

Yes. The PDF分割・結合 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.