We run one of the tools listed here, so read this with that in mind. Everything stated about the other providers comes from their own public pages and carries the date above. What we can say about our own service is checkable in the tools themselves.

The comparison at a glance

What actually sets them apart

On the everyday jobs, merging, splitting, compressing, converting to Word, all four do the same thing and do it well. Picking by feature list will not get you far. The real difference is where your file is while it is being worked on.

With most online tools the file is uploaded, processed on a server and deleted after a while. That is normal and works. It does mean a copy of your document exists on someone else's machine for a period of time. For a train timetable that is irrelevant. For an employment contract or a medical report it is worth a thought.

This is where PDF Monster differs: 35 of the 68 tools never send the file anywhere. The work happens in your browser, on your device. You can verify it yourself by disconnecting from the network after the page has loaded, those tools keep working.

Where the others are ahead

Fairness demands this part. Adobe sets the PDF standard and its handling of unusual or damaged files is hard to beat. iLovePDF and Smallpdf have been around far longer, have apps for phone and desktop and integrate with cloud storage. If you need a desktop application, an API or team accounts, they are the better fit. PDF Monster is a website, nothing more.

Frequently asked

Which online PDF tool is the best?

There is no single answer, it depends on what matters to you. If you want the widest recognition, iLovePDF, Smallpdf and Adobe are the established names. If you care that your file never leaves your computer, PDF Monster is the one to look at: 35 of its 68 tools run entirely in the browser, so no copy is ever created on a server.

Which PDF tool works without uploading the file?

At PDF Monster 35 of 68 tools process the file on your own device, among them merging, splitting, rotating, deleting pages, watermarks and page numbers. These tools are marked as working without upload. The other providers listed here process files on their servers.

Is there a free PDF tool without a daily limit?

PDF Monster does not limit the number of files or conversions per day and adds no watermark. iLovePDF and Smallpdf offer free use with daily limits that lift with a paid plan.

Which PDF tool is suitable for confidential documents?

For contracts, payslips or medical records the tools that work without upload are the safer choice, because the file stays on your device. If a document does have to be processed on a server, PDF Monster keeps it for about an hour and then deletes it, and the storage folder cannot be reached from outside.

Try it yourself

The tools people reach for most often:

• Merge PDF
• Compress PDF
• PDF to Word
• Split PDF
• Sign PDF
• Create PDF