Email HTML preview
Paste any email HTML and see exactly what a mail client would render — in a sandboxed frame where scripts cannot run and nothing can call home, at desktop or mobile width. Need the plain-text part too? The tool generates one from your HTML on the fly.
Rendered in a sandboxed iframe (scripts disabled, no same-origin access) — the HTML never leaves your browser.
Generated text version
A 30-second checklist while you look
- Widths: switch to 375px — does the layout stack instead of scroll?
- Links: check the text version — every link should carry a sensible URL, not a 400-character tracking redirect.
- Images: most clients block them at first — does the message still make sense with alt text alone?
- Dark corners: verify the footer (unsubscribe, address) survived the template loop.
Sending from your app? Capture real sends into a disposable inbox with the SMTP gateway and preview exactly what production produced.