Every "best free tools" list looks the same — ten names, a screenshot each, and not one word about the account you'll have to create or the file you'll have to hand over. ToolPotato is what happens when someone actually uses them. We try the job without signing up, watch the network tab to see if the file leaves your machine, screenshot the permission screen before cancelling, and push the free tier until something breaks — then write down exactly where that line was.