Web Development

Automate tests for signup flows, transactional email, and spam scores with Testmail’s email testing tools.

Replit builds working apps and websites from natural language descriptions, with no coding required to get started.

Create custom maps with uMap using OpenStreetMap background layers, then embed them on a website.

Set up a local Apache distribution with XAMPP, which includes MariaDB, PHP, and Perl.

Retype builds static documentation websites from simple text files and Markdown content.

Build WordPress themes with Timber, a framework that reduces the WordPress-specific knowledge needed for theming.

Consult a platform-agnostic specification describing technical features of a well-built website.

Create a personal web page with Temper, then customize its colors and typography and download the HTML.

Learn about progressive web apps through explanations and live demos of installation, notifications, and device features.

Livepush tests HLS and DASH stream URLs and provides a player for use on websites.

Timber helps developers create WordPress themes using object-oriented PHP and the Twig template engine.

Run PHP code online and compare output across hundreds of PHP versions with the 3v4l editor.

mmm.page lets users create personal websites with layouts designed to feel distinct from standard templates.

A free five-field cron expression editor with readable explanations and examples; its interface source uses MIT licensing.

IBM’s accessibility checker and toolkit help inspect web pages and identify accessibility issues.

Plate provides customizable plugins and components for building rich-text editors.

Convert SVG markup into valid JSX with this browser-based editor, which accepts pasted code or uploaded files.

PWABuilder helps developers prepare Progressive Web Apps for publication in app stores.

Zarla uses AI to help businesses create a professional website in seconds through its website builder.

Write regular expressions in Melody, a language designed to make regex patterns more readable and maintainable.

Wix provides a website builder with templates, AI tools, and a custom domain option.

Octopus.do helps plan website architecture with a visual sitemap builder and low-fidelity wireframes.

Broider creates nine-patch borders and provides CSS that can be copied into a web project.

Capture screenshots from different countries using geolocation to check how localization affects a website.