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PDF Split & Merge

Merge multiple PDF files into one clean document, or split and extract customized page ranges 100% locally.

100% Client-Side In-Memory Execution • Zero Server Uploads
Select PDF Files
Drag & drop PDF files here
or click to browse from your device
Files: 0 Total Pages: 0
Output & Export Ready
Select PDF files to begin merging or splitting
Processed locally with pdf-lib • No bandwidth limits

How to Use PDF Split & Merge

Follow these 3 quick steps to merge multiple files or extract exact page ranges entirely in your browser.

  1. 1

    Upload PDF Documents

    Drag and drop your PDF files directly into the dropzone or select them from your device. Files stay stored in your browser's private memory.

  2. 2

    Configure Merge or Split

    In Merge mode, reorder documents as desired. In Split mode, specify exact page numbers (e.g. 1-5, 8) to create your tailored document.

  3. 3

    Process & Download

    Click "Process PDF" to assemble your document instantaneously. Then click "Download PDF" to save the finished document immediately to your device.

Frequently Asked Questions

Everything you need to know about privacy, security, and client-side processing.

Are my sensitive PDF documents uploaded to any remote server?
Never. FixlyTools runs 100% client-side via WebAssembly and pdf-lib. All PDF bytes are loaded into your device's local RAM and processed on your CPU. Not a single byte ever travels over the internet.
What is the maximum file size for merging or splitting PDFs?
Because all operations occur within your browser's memory sandbox, file limits depend only on your computer's RAM. We comfortably support files up to 250MB+ without performance degradation.
Which web browsers are supported?
FixlyTools PDF Split & Merge works flawlessly on all modern browsers supporting ECMAScript 6 and FileReader APIs, including Chrome, Safari, Firefox, Edge, and mobile browsers on iOS and Android.