What you see
The tool shows Loading the tool… with a count such as “2 of 4 parts”, and the count stops moving. Or the loader gives way to This tool didn’t finish loading and a Reload page button.
While a tool is loading, its buttons are locked on purpose. Before that lock existed, a half-loaded tool looked ready: you could choose a file, press the button, and nothing would happen.
Why it happens
The page arrives first, and the parts that make the tool work — its scripts — download just after it. If one of them does not arrive, the tool cannot start. That is almost always one of these:
- A slow or dropped connection. On mobile data or weak Wi-Fi, one download can stall while the rest of the page looks fine.
- An extension that blocks scripts. Some ad blockers, privacy extensions and script blockers stop downloads they do not recognise.
- A network that filters downloads. Some work, school and public networks block certain scripts.
What to do
- Press Reload page. Most stalls are a one-off.
- Check the connection, then reload again.
- Open the same page in a private window, where most extensions are off. If it loads there, allow this site in the extension that was blocking it.
- Try another network, such as mobile data instead of Wi-Fi.
Nothing is uploaded while a tool loads — the downloads only go one way, from this site to your browser.
If none of that helps, tell us which tool it is and which browser you use.