You need to shrink a PDF. You search, click the first result and drop the file in. It takes seconds. But have you ever wondered where that file went?
Most free tools are fine. A few are not, and you cannot tell from the page alone. Here are some quick checks that take less than a minute.
Why free needs a second look
Running a website costs money. Servers, bandwidth and developers all need paying, so a free tool has to get that money from somewhere. Usually it is ads, and that is fine. Sometimes it is your data.
When a tool uploads your file, a copy lands on someone else's computer. A good service deletes it after an hour or so. A careless one keeps it for months, or never says how long.
Two kinds of tools: upload and in-browser
Upload tools send your file to a server, work on it there and send the result back. In-browser tools do the work on your own device, using your phone or computer. The file never travels anywhere.
In-browser tools have limits. Very large files can be slow on an old phone, and some jobs, like turning a scanned page into editable text, still need a server. But for everyday jobs such as merging PDFs, resizing photos or counting words, your own device is plenty.
Five checks before you upload anything
- Look for a clear sentence about where the work happens. Phrases like runs in your browser or files never leave your device are a good sign. Silence is not.
- Find the privacy policy. It should say how long files are kept. Deleted after one hour is fine. We may keep your files is not.
- Be wary of forced sign-ups. If a tool wants your email before it shows a result for a one-minute job, it usually wants something else too.
- Watch the buttons. Fake Download buttons that are really ads are an old trick. The real button usually appears after the tool has finished its work.
- Check the address. Make sure the web address is spelled correctly and starts with https. Copycat sites with slightly wrong names exist.
The 30-second offline test
This is the best check of all, and anyone can do it.
- Open the tool and wait for the page to load fully.
- Turn off your Wi-Fi or switch on airplane mode.
- Use the tool with a small, harmless file.
- If it still works, the job is happening on your device and nothing is being uploaded. If it complains about the connection, your file would have been sent to a server.
Some tools, including our PDF ones, download their working parts the first time you use them. Run them once online with a harmless file, then try again offline.
What stays private on TheFreeTool
We built TheFreeTool so your files never need to leave your device. Merging and compressing PDFs, resizing images, converting JPG to PNG, counting words and the calculators all run in your browser. We do not receive your files or your text.
To be fully honest about what we do see: we use Google Analytics to count visits, such as which pages are opened and from which country. If you press Report an issue, we receive the message you write and basic details like your browser type. That is all.
When to be extra careful
Even with a trusted tool, think twice before you process documents that would hurt you if they leaked, like passport scans, medical files or signed contracts. For those, an app installed on your own computer that works offline is the safest choice. And always keep the original file.
Try the tools mentioned here
All of them run in your browser. You can test them offline too.