SendPage: Share an HTML file as a link anyone can open in one tap

Claude writes me a good-looking client document in about thirty seconds. Getting it to the client took longer than writing it did. The .html attachment is the obvious move and the one least likely to work — on a phone it often opens as raw source, and some corporate mail filters strip HTML attachments outright as a phishing vector, so it never arrives. Printing to PDF flattens interactive charts and silently cuts the right-hand columns off wide tables. That last one is the failure I hated most: nobody notices until a client asks about a number that isn't there. So SendPage takes the HTML and gives back a link. One tap, renders as designed, previews in WhatsApp and WeChat with a real thumbnail. Exports come from an actual browser render rather than a converter, so wide diagrams turn the page to landscape instead of losing a column, and Chinese, Japanese, Arabic and Thai text keep their fonts. Two things I'd genuinely like feedback on: 1. It's also a remote MCP server, so the step never leaves the conversation — you ask Claude to send the proposal and it publishes. I'm not sure yet whether that reads as useful or as a gimmick. 2. Uploaded HTML is untrusted and arbitrary. It runs in an iframe without allow-same-origin plus a CSP sandbox directive on the raw route, because that URL is directly navigable and frame-ancestors does nothing for a top-level visit. If you want to try breaking out of it, I'd rather hear about it from you than from someone else. Free for 5 documents a month, no signup. Happy to answer anything.