Frontend Development

UI, markup, styling, and client-side tools for interfaces that run in the browser.

SOAP & WSDL XML Formatter: How to Format, Validate and Debug SOAP Online

Published on October 6, 2026 by Hasnain

Format SOAP envelopes and WSDL files online. Pretty print, validate, check namespaces and test XPath free in your browser. No signup.

Frontend Development
Developer Productivity

EML vs MSG: What's the Difference?

Published on October 5, 2026 by Hasnain

EML vs MSG explained: what each format contains, which to save, how to convert MSG to EML, and how to preview EML files free in your browser.

Frontend Development
Developer Productivity

What Is MJML? Responsive Email Markup Explained

Published on October 3, 2026 by Hasnain

MJML is an open-source markup language that compiles to responsive, table-based HTML email. Learn how it works, its tradeoffs, and how to try it free online.

Frontend Development
Developer Productivity

Best Free HTML Viewer in 2026: What Actually Matters

Published on October 2, 2026 by Hasnain

Best free HTML viewer in 2026 — what "best" should mean, a 3-step test for any tool, and a free no-signup viewer with live preview, panels mode, and Inspect.

Frontend Development
Developer Productivity

How to Compare Two HTML Files Online and Find the Differences

Published on September 30, 2026 by Hasnain

Compare two HTML files or snippets and see exactly what changed — line and word-level highlights, side-by-side or unified view, free in your browser.

Frontend Development
Developer Productivity

How to Inspect HTML Elements Online From a Live Preview

Published on September 29, 2026 by Hasnain

Click a node in the live preview and jump straight to that markup in the editor — inspect HTML without opening DevTools.

Frontend Development
Developer Productivity

How to Match Spaces and Whitespace in Regex

Published on September 28, 2026 by Hasnain

Learn how to match spaces and whitespace in regex. Compare \s vs a literal space, use [ \t], allow spaces, trim, and collapse runs with examples.

Frontend Development
Developer Productivity

How to Open an HTML File on a Chromebook

Published on September 25, 2026 by Hasnain

Open, view, and edit any HTML file on a Chromebook — no install needed. Step-by-step methods for the Files app, browser drag-and-drop, Linux terminal, and a free online HTML viewer.

Frontend Development
Developer Productivity

$How to Match Newlines and Line Breaks in Regex (\n, \r, \r\n Explained)$

How to Match Newlines and Line Breaks in Regex (\n, \r, \r\n Explained)

Published on September 13, 2026 by Hasnain

Learn how to match newlines in regex with \n, \r, \r\n, the s (dotAll) and m (multiline) flags, and why JavaScript's $ matches before a final newline even without m. Test live.

Frontend Development
Developer Productivity

How to Validate HTML for SEO and Accessibility Errors

Published on September 8, 2026 by Hasnain

Validate HTML online and find HTML validator, SEO HTML errors, and accessibility issues with practical tips for cleaner, more usable code.

Web Development
Frontend Development

10 Common HTML Mistakes That Break Your Layout

Published on September 4, 2026 by Hasnain

Learn common HTML mistakes, fix HTML layout bugs, and troubleshoot broken HTML with practical examples and useful debugging tips.

Web Development
Frontend Development

HTML vs XHTML: What's the Difference and Does It Still Matter in 2026?

Published on September 4, 2026 by Hasnain

HTML vs XHTML explained: syntax rules, why XHTML was created, and why HTML5 replaced it for almost all new sites in 2026.