Contact
There is no support ticket system and no chatbot — just addresses that reach a person. Pick the one that fits and you will get a faster answer.
Before you email
Two questions come up often enough to answer here. If a tool says your file is encrypted, it is password-protected and has to be unlocked before anything else can read it. If a converted document came out with the layout scrambled, that is conversion being lossy rather than a fault — the file handling page explains where each tool’s limits are.
Please do not send us your documents
We do not need your file to investigate a bug, and we would rather not hold a copy of it. Describe what happened instead. If a file is genuinely required to reproduce something, we will ask, and we will tell you what happens to it first.
What to expect
A real reply, from a person, though not instantly — this is a small operation. Security reports get looked at first.