“Email”

Lookup table showing which HTML and CSS features work in common email clients.

Moves the CSS you paste into inline style attributes on the HTML, the format email clients expect.

Public inboxes for catching test emails and verification codes during QA.

Tests an SMTP server configuration by attempting a connection and test message.

Collection of ready-made regular expressions for emails, URLs, phones and other formats.

Gives you a temporary URL and email address that records incoming HTTP requests so you can inspect webhooks.

Collection of web developer tools such as an aspect ratio calculator, color picker and formatter.