Writing
Mostly measurements. When we say a tool uploads your file, or that ours does not, there is a run behind it: the file we used, the date, and what the network showed. The method is published every time so you can re-run it against any tool, this one included.
Comparison ·
Best free HEIC to JPG converter, tested
The same iPhone photo through five free HEIC converters, with the network watched. Two sent it to a server, one before we pressed Convert.
Comparison ·
Do online PDF tools upload your file? We measured four
We sent the same 1,054-byte file through four PDF tools and watched the network. Three uploaded it. The method is included so you can re-run it.
Method ·
How filetity processes files locally
Which network requests happen on a filetity tool page, when, and how to verify for yourself that your file is not one of them.