What this website provides
HTMLEmailEditor.online is a focused collection of browser-based tools for people who build and review HTML email. The HTML email tester checks supplied source for structural, CSS, image, link, accessibility, responsive, size, tracking, and security concerns. The code editor supports direct HTML and CSS editing, while the live preview compares browser layouts at common viewport widths.
How the tools are designed
The tools favor specific, inspectable findings over unexplained claims. Reports identify the rule, location, context, and suggested correction where possible. Draft editing uses local browser storage, and supplied source is not placed in an account or cloud-draft database.
The educational email development guides explain the scope behind the checks and link to authoritative technical references where appropriate.
What the tools do not claim
A browser preview is not an emulation of Gmail, Outlook, Apple Mail, or another email client. A source audit cannot guarantee inbox placement, deliverability, accessibility conformance, or identical rendering. Remote servers can also refuse automated link or image checks. These limits are shown because a useful technical tool should distinguish measured evidence from decisions that still require people and real sent-message tests.
No accounts or paid plans
The current website does not require an account, subscription, or payment to use its public tools. There is no invented organization history, physical office, certification, or named team behind the product pages. For website questions, use the contact page.