The questions that come up most often, answered plainly.
Yes. No account, no trial, no daily limit and no watermark. Adverts on the pages pay for the hosting.
No. Your browser reads the file from your own device, changes it there, and gives it back. Nothing is sent to a server and no copy is kept. You can test this yourself: turn off your internet after the page has loaded, and most tools still work.
There is no rule set by us. The limit is your own device's memory. A very large file, or many files at once, can be slow or fail on an older phone. If that happens, do fewer at a time.
Usually one of three things: the PDF needs a password, the file is damaged, or the format is not supported in a browser. Each tool says which one it was rather than giving you a broken result.
It depends on the job. Rotating by a quarter turn, merging PDFs and removing pages change nothing. Compressing an image always costs some quality, because that is what compression is. Saving a JPG again loses a little every time.
Read the message again and look at the unit. KB or MB means file size, so you need the compressor. Pixels or two numbers with an x between them means dimensions, so you need the resizer.
The tool makes the size and shape correct. Whether the photo itself is accepted depends on things no tool can judge — your expression, the lighting, the background, glasses, head covering rules. Always check the requirements of the office you are applying to.
Yes, that is what it was built for. Everything works on Android and iPhone in a normal browser. No app to install, though you can add the site to your home screen if you want.
No, and there is no way to make one. There is nothing to sign up for.
Yes. There is no licence to buy and no restriction on business use.
Write in through the contact page with the tool name and what happened. It gets fixed faster than you would expect.