I built a free email signature generator and the most requested feature surprised me

A while back I put together FreeSignature (freesignature.site), a free generator for HTML email signatures — no account, no watermark, nothing to install. I made it because every tool I found either wanted $9/month or stamped its own logo into my signature.

What surprised me is what people actually asked for. I expected requests about fonts, colours, layout. Almost none came. The two things people wrote about were:

1. "Will it still work in Outlook?" Outlook renders email HTML with Word's engine, so anything modern breaks in ways you only discover after sending it to a client. Half the work in that tool is not design, it is avoiding CSS that Outlook silently drops.

2. "Where is my data going?" A signature contains your full name, role, phone number and employer. People were right to ask. It runs entirely in the browser; nothing is sent anywhere.

Two lessons I did not expect from a tool this small: the hard part was compatibility, not design, and the thing people worried about was privacy, not looks.

If it is useful to you: freesignature.site - it is free and stays free.

Curious whether others building small free tools found the same gap between the features you plan and the questions you actually get.