Merge PDF Files
Combine multiple PDFs into a single document, in the order you choose.
Drag & drop PDF files here
or browse from your device
Select 2 or more PDF files · Nothing is uploaded
Merge, split, compress, and convert your PDF files instantly — all inside this browser tab. Nothing is ever sent anywhere.
100% Private: Your files never touch a server. All processing happens entirely inside your web browser.
Combine multiple PDFs into a single document, in the order you choose.
Drag & drop PDF files here
or browse from your device
Select 2 or more PDF files · Nothing is uploaded
1-3, 7.Yes. Every tool on this page runs entirely inside your web browser using JavaScript libraries loaded once when the page opens. Your PDF and image files are never uploaded, transmitted, or stored on any server — all merging, splitting, compressing, and converting happens locally on your own device.
There's no hard-coded limit set by PDFAnswerHub, since processing depends entirely on your device's own memory and processor rather than a server quota. In practice, most documents up to a few hundred megabytes and several hundred pages work smoothly on modern laptops and phones. Very large files may take longer, especially on older mobile devices.
PDFAnswerHub works in all modern browsers, including current versions of Chrome, Edge, Firefox, and Safari, on both desktop and mobile. The layout and touch targets are optimized for phones and tablets, so you can merge, split, compress, or convert files on the go without installing an app.
No. All five tools — Merge, Split, Compress, PDF to JPG, and Image to PDF — are free to use with no account, sign-up, or watermark required.
Each tool checks the file type before processing. If a file doesn't match what the tool expects (for example, uploading a Word document to the PDF merger), you'll see a clear red error message instead of the app crashing or freezing, and you can simply remove that file and try again.