Frequently asked questions
- Is my data uploaded to a server?
- No. Every operation runs inside your browser using JavaScript. Nothing you paste or type is sent to our servers, stored or logged. You can disconnect from the network after the page loads and the tool keeps working.
- What do the three digits mean?
- One each for the file's owner, its group and everyone else. Each is the sum of read (4), write (2) and execute (1), so 7 is all three and 5 is read and execute.
- Which permissions should I use?
- 644 for ordinary files and 755 for directories and programs are the usual answers. 777 gives every user on the system permission to change the file and is almost never the right fix for a problem.
- What does execute mean on a directory?
- Permission to enter it and reach what is inside, rather than permission to run it. A directory you can read but not execute lists its contents without letting you open them.
Related tools
Stuck on an error?
Every common JSON parse error is explained separately, with the cause and the fix: common JSON errors.
How your data is handled
Everything happens on your device. There is no upload, no storage and no logging, and only your interface preferences - theme, indentation, font size and word wrap - are kept between visits. Closing the tab clears the document.