Rohman
The download page said it straight: "files remain locally on your PC and are not uploaded to the Internet." You believed it, because it was true. Then you clicked the same link on the Chromebook your kid does homework on, or a work laptop your IT department has locked down, and what landed in Downloads was pdf24-creator-installer.exe. Nothing about that runs on ChromeOS, and nothing about it runs without admin rights you don't have. The choice narrowed to one option: open the browser tool instead, and hand it the exact file you'd gone looking for a local tool to avoid handing anyone.
That's the whole story with PDF24. Not a task quota, not a watermark. A privacy promise that only ships for one operating system.
What PDF24 actually is
PDF24 is a PDF toolkit built by Geek Software GmbH, a small Berlin-based team that's been at this since 2006, back when the project carried the older name PDFDrucker. There's no watermark stamped on exports and no page or file-count ceiling to bump into, the two things that trip up nearly every other tool in this category. Two decades in, it's still run by, in the company's own words, "a small agile team" rather than a venture-scaled operation.
Two products wearing one name
Here's the part the marketing blurs together. "PDF24" is two separate products with opposite privacy models, and the name alone doesn't tell you which one you're using.
PDF24 Creator is the desktop app: "a desktop solution that works offline. Files remain locally on your PC and are not uploaded to the Internet." That's real local processing, the thing people actually mean when they ask for a privacy-first PDF tool.
tools.pdf24.org is the other half, the web tools you land on the moment Creator isn't installed, can't be installed, or you just clicked a search result. Every one of those tools uploads your file to a PDF24 server before it does anything. That's not hidden. It's just never in the same sentence as "files stay local," because that sentence is only true for one of the two products sharing the brand.
Free, and not the usual catch
No premium tier for end users, no trial countdown, nothing behind a paywall. PDF24's own tools page says it directly: "You can use all PDF24 tools free of charge and without any restrictions... There are no artificial limits at PDF24." The FAQ explains what funds that: the tools are "financed by means of discreet advertising on the websites," not by squeezing free users toward a paid plan.
Set that against Sejda's three-tasks-per-hour wall or PDFelement's watermarked trial, and PDF24 looks almost old-fashioned in its generosity. If none of the caveats below apply to you, it's a good deal, plain and simple.
The one-hour clock
To PDF24's credit, they say exactly what happens next instead of staying vague about it. Per the FAQ: "uploaded files in the online tools are automatically deleted from the server after one hour." The privacy policy adds the detail that matters most: "During this hour we do not look at the files and do not evaluate them. Backups of these files are generally not created." Servers sit inside the EU.
An hour is a short window, and a written commitment not to look at or back up your file is more than most competitors bother to put in writing. It's still an hour where your tax return or your kid's report card sits on hardware that isn't yours. If your own device could have done the job, that hour was never necessary in the first place.
Windows or nothing
Go looking for a Mac or Linux build of PDF24 Creator and PDF24 answers the question itself, on its own download page: "No, the PDF24 Creator can only be installed on Windows systems. Linux and MAC are not currently supported." Not "not yet, on the roadmap." Not yet, full stop, after nearly twenty years of active development.
That one line decides which privacy model you get. Windows machine, admin rights: install Creator, process files locally, never touch a server. Mac, Chromebook, Linux box, tablet, phone, or a work laptop where you can't install anything at all: you're on the web tools, uploading, every single time.
What independent reviewers say
PDF24 carries a 4.5-star Trustpilot rating from 113 reviews on its main tools domain. Solid, if a modest sample next to a giant like Sejda. The praise matches the facts above: people like that it costs nothing and gets the job done. The complaints are about ads on the web pages, and about the platform gap this whole post is built around.
What pushes someone to search "PDF24 alternative"
Four moments come up again and again:
- You need to merge or compress a file on a Mac, a Chromebook, or a phone, and the local option simply doesn't exist for that device.
- IT locked down installs on your work laptop, so Creator is off the table even though you're technically on Windows.
- You're handling something you'd rather not put on any server for even an hour: a signed contract or a medical form.
- You tried the web tools, they worked fine, then you read the retention policy and wanted a version that skips the upload step entirely.
PDF24 doesn't have a good answer to any of these beyond "use a different computer" or "accept the upload."
Where OxygenPDF sits
OxygenPDF runs the whole toolkit in your browser tab, compiled to WebAssembly. There's no installer, so there's no operating-system gate: the local processing PDF24 promises on Windows works identically on a Mac, a Chromebook, a Linux box, or a tablet. Open DevTools, watch the Network panel while you process a file. It stays empty.
A non-exhaustive map:
- /tools/merge-pdf — combine files locally, on whatever machine you're holding
- /tools/compress-pdf — shrink a scan without a server ever seeing it
- /tools/edit-pdf — fix a typo or drop in an image, no install required
- /tools/ocr-pdf — make a scan searchable without uploading it anywhere
- /tools/sign-pdf — sign a form on the Chromebook that could never run Creator
- /tools/redact-pdf — remove sensitive text for real, still with no server involved
PDF24's catalog is wider on raw tool count, and its fax service and PDF/A archival tools cover ground OxygenPDF doesn't chase. If you're on Windows, don't mind the install, and your jobs fit inside Creator, keep using it. It earns its place.
The narrow point
PDF24 isn't a bait-and-switch. It's free, honestly free, built by a small German team that's kept the lights on with ads instead of paywalls for two decades. The one-hour retention window on its web tools is short and disclosed in plain language, which is more than most competitors manage.
The gap is narrower and more specific than most "alternative" posts want it to be. Local processing exists at PDF24. It just only ships for one operating system. Everyone else, Mac, Chromebook, Linux, tablet, or a locked-down office laptop, gets the upload regardless. Drop a file at /tools/merge-pdf or /tools/edit-pdf and the local option just works, no matter what's printed on the case.
