Preview for Gmail & Chat: HTML, Markdown, JSON

Tired of your inbox showing HTML attachments as raw source code?

This extension renders HTML, Markdown, and JSON attachments the way they're
meant to look — in a clean, full-screen viewer — without downloading them or
leaving your inbox.

• Web pages are rendered exactly as designed, in a secure sandbox.
• Markdown documents are formatted with headings, tables, code blocks, and
links.
• JSON data opens as an interactive, collapsible tree with search, a raw-text
toggle, and one-click copy. Common variants of these formats are supported
too.
• Print what you are reading, or save it as a PDF containing just the document —
no mail-client furniture around it, and named after the file itself.

How it works:
Hover any supported attachment — in Google Chat, an open Gmail message, or your
inbox list — and click the eye icon that appears. The file opens in a
full-screen preview, ready to read, print or save. Press Esc or click Close to
dismiss.

Private and secure by design:
• No accounts, no servers, no analytics, no tracking — nothing ever leaves your
browser.
• Files are rendered inside an isolated sandbox with no access to your Google
account or session.
• The extension only ever talks to Google's own file endpoints to fetch the file
you chose to preview.