W3C Markup Validation Service

Reviewed matches are labeled. Other suggestions come from a shared subcategory, use case, source listing or the same category. Compare features and current plans before choosing.

Product
HTML Email Check Preflight Analysis and Validation for HTML Emails.
HTML Validator HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
ValidateHTML Validate HTML, CSS, JSON, XML & more — instantly
Total Validator Total Validator can check your website to help ensure that it is accessible, uses valid HTML and CSS, has no broken links, and is free from spelling mistakes.
SelfDevkit 50+ essential tools in a single desktop app. Offline and private.
Real-time online HTML editor Create & edit HTML code without writing a line of code.
Global Sites Build static sites with multiple languages and AI
Jomatter Free browser-based tools for formatting, minifying, validating, and analyzing HTML, CSS, and JavaScript code without signup.

Selected by category and available use-case details. A topic match does not establish equivalent features.

Product
BuddyNS BuddyNS is the fastest-to-synchronize DNS service on the Internet.
Maytapi WhatsApp API for Developers. Integrate WhatsApp seamlessly with Maytapi's powerful API. Manage messages, groups, channels, and statuses effortlessly. Stable, developer-friendly, and REST API with excellent support and do
Greasemonkey Customize the way a web page displays or behaves, by using small bits of JavaScript.
Gitpod One click dev environment for GitHub
SiteCraft Build your website in 10 minutes
Zenduty Zenduty is a state of the art incident management solution that provides cross-channel alerts to your team whenever critical incidents occur.

Added to this directory in the past 30 days. Dates refer to the directory listing, not the product launch.

Product
Foreman Intelligence We turn the cameras you already have into alerts, evidence a
Real Estate Location Intelligence & POI Data Maps, POI data & location APIs for real estate platforms
What to Vibe Daily viral app ideas with full build prompts
TechEUC TechEUC shares IT tutorials and solutions for Intune, SCCM

Profiles grouped by topic. This does not confirm an offer, availability or a connection to this profile.

Profile
James NoCode YouTube · 57K subscribers
NoCode AI Builders YouTube · 13K subscribers
NeuSource Startup Minds 🎯 NeuSource के साथ करें अपने नए बिज़नेस की शानदार शुरुआत ⬇️

Shows and channels grouped by topic. A recommendation does not mean this profile was featured or endorsed.

Show
Gareth Pronovost | Build Without Code YouTube · 42K subscribers
PlanetNoCode YouTube · 36K subscribers
Glide YouTube · 31K subscribers

Retold founder accounts from startups in the same category, each linked to the original.

Story
Tailwind UI's $2 million was five months of a commercial product, not a URL typo Adam Wathan's August 2020 essay says Tailwind CSS had about 10 million installs and that Tailwind UI, then about five months old, was about to cross $2 million in revenue, figures he stated himself beside a slug that mis
ScreenshotOne took three years to $10k MRR and eight months to $20k Dmytro Krasun says ScreenshotOne reached $10k monthly recurring revenue in September 2024, almost three years after launch, then $20k in June 2025, and that the second number changed how much more money still drove him.
AJ said Carrd was about $1.2M ARR and he spends time on the product, not campaigns AJ told SaaS Club Carrd was about $100k MRR, about $1.2 million ARR, and that with two people he invests time in the builder rather than in finding ways to market it; he did not, in the sources fetched here, state $2M AR
WP Engine passed $100M ARR after Cohen made thirty people say they would pay $49 Jason Cohen says he did not start WP Engine until 30 people said they will pay $49 a month, 20 of them did, and in January 2018 he reported the company had passed $100 million ARR and closed $250 million from Silver Lake

Subcategories in the same part of the directory, with the number of listed products.