Hi, I'm Joost de Valk 👋🏼 I'm an internet entrepreneur and open source developer from the Netherlands. I'm Group Head of AI & Growth at Your.Online, where I lead an…
Hi, I'm Joost de Valk 👋🏼
I'm an internet entrepreneur and open source developer from the Netherlands. I'm Group Head of AI & Growth at Your.Online, where I lead an AI team building tools to help entrepreneurs get online and grow. I founded Yoast (acquired by Newfold Digital in 2021) and still invest in digital companies through Emilia Capital.
What I'm working on
- Progress Planner — A WordPress plugin that helps site owners stay on top of website maintenance by tracking stats and rewarding consistency with badges. See ProgressPlanner on GitHub.
- Rondo — Club management software for Dutch sports clubs that use Sportlink. Replaces spreadsheets with a unified system for member management, syncing, and communication. See rondohq on GitHub.
- Helping our portfolio companies grow, and taking on select consulting projects.
Tech stack
!PHP
!WordPress
!JavaScript
!TypeScript
!React
!Astro
!Node.js
GitHub stats
Connect with me
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specification.website
Website specification — HTML, accessibility, security, SEO, agent-readiness. Platform-agnostic, sourced, MIT.
TypeScript ★ 767 11h agoExplain → -
XML-Sitemap-PHP-Script
Easily create XML sitemaps for directories with static files
XSLT ★ 113 2y agoExplain → -
skills
Agent skills for GitHub repos and profiles, WordPress and EmDash plugins, Astro SEO, and content readability.
Python ★ 85 12d agoExplain → -
seo-graph
Agent-ready SEO for JavaScript — schema.org JSON-LD graph builder with an Astro integration.
TypeScript ★ 43 4d agoExplain → -
ask-endpoint
AI-powered /ask endpoint for static sites on Cloudflare Pages. Hybrid search + LLM answers via Workers AI. NLWeb-compatible.
JavaScript ★ 13 3mo agoExplain → -
emdash-plugin-seo
SEO plugin for EmDash CMS — meta tags, Open Graph, canonical URLs, robots directives, and JSON-LD schema markup
TypeScript ★ 13 28d agoExplain → -
playground-embedder
Embeds the WordPress playground through a shortcode
PHP ★ 11 2y agoExplain → -
alfred-quix
An Alfred workflow to quickly perform numerous checks on websites.
★ 8 2mo agoExplain → -
obsid.net
No description.
JavaScript ★ 4 4mo agoExplain → -
cocktail.glass
500 cocktail recipes as an Astro site — and an agent-ready MCP server, no API key.
JavaScript ★ 4 1d agoExplain → -
to-markdown
Native macOS app for converting HTML to GitHub Flavored Markdown
Swift ★ 4 5mo agoExplain → -
clicky
WordPress plugin for Clicky.com Analytics
PHP ★ 4 2y agoExplain → -
emdash-plugin-lettermint
Lettermint email provider plugin for EmDash CMS
TypeScript ★ 3 18d agoExplain → -
web-fetch-mcp
Fetch any URL as clean Markdown — content negotiation first, headless browser fallback via Obscura
TypeScript ★ 2 6d agoExplain → -
joost-blog
Personal blog - joost.blog
JavaScript ★ 1 8h agoExplain → -
awesome-mcp-servers ⑂
A collection of MCP servers.
★ 1 1mo agoExplain → -
astro-markdown-alternate
Astro integration that makes markdown sources discoverable via <link rel="alternate" type="text/markdown">, so AI agents and HTTP clients can fetch the raw content of any page.
TypeScript ★ 1 6d agoExplain → -
fair-pm-static
Static version of fair.pm built with Astro, Pagefind search, and dark mode
Astro ★ 1 3mo agoExplain → -
element-finder
No description.
PHP ★ 1 3y agoExplain → -
jdevalk
My personal repository used to house my profile.
★ 0 16h agoExplain → -
draft-devalk-redirect-by
Internet-Draft: The Redirect-By HTTP Response Header Field
Makefile ★ 0 1d agoExplain → -
wn-redirect-plugin ⑂
Advanced redirect plugin for Winter CMS.
★ 0 3d agoExplain → -
the-seo-framework ⑂
The SEO Framework plugin for WordPress
★ 0 3d agoExplain → -
redirection ⑂
Manage all your WordPress 301 redirects and monitor 404 errors
★ 0 3d agoExplain → -
ClassicPress ⑂
The CMS for Creators. Stable. Lightweight. Instantly Familiar. Forked from WordPress.
★ 0 3d agoExplain → -
laadpalenwijchen.nl
No description.
HTML ★ 0 18d agoExplain → -
obsidian-mcp ⑂
A simple MCP server for Obsidian
★ 0 1y agoExplain → -
astro ⑂
The web framework for content-driven websites. ⭐️ Star to support our work!
TypeScript ★ 0 1mo agoExplain → -
astro-sitemap-index-lastmod-repro
Minimal reproduction: @astrojs/sitemap omits <lastmod> from sitemap-index.xml entries
JavaScript ★ 0 1mo agoExplain → -
birdnet-go ⑂
Realtime BirdNET soundscape analyzer
★ 0 20d agoExplain → -
emdash ⑂
EmDash is a full-stack TypeScript CMS based on Astro; the spiritual successor to WordPress
TypeScript ★ 0 3mo agoExplain → -
time-team-digs
Interactive map of all 291 Time Team archaeological dig locations (1994-2025)
HTML ★ 0 3mo agoExplain → -
time-team-ai-collaboration
No description.
HTML ★ 0 3mo agoExplain → -
fair-handler ⑂
No description.
★ 0 3mo agoExplain → -
art-installation ⑂
No description.
★ 0 3mo agoExplain → -
mini-fair-repo ⑂
Self-hostable FAIR repo, designed for small-scale
★ 0 7mo agoExplain → -
wp-api-privacy ⑂
A plugin for WordPress to restrict information passed via the WordPress HTTP API. Not affiliated in any way, shape, or form with WordPress.org or Automattic.
PHP ★ 0 8mo agoExplain → -
wappalyzer ⑂
HTTP Archive fork of Wappalyzer
JavaScript ★ 0 1y agoExplain → -
developer ⑂
The Yoast Developer portal based on Docusaurus
★ 0 1y agoExplain → -
app-framework ⑂
Production-ready framework for building enterprise applications with TypeScript, React, and real-time capabilities
★ 0 10mo agoExplain → -
docker-n8n-psql
No description.
Shell ★ 0 1y agoExplain → -
wordpress-seo ⑂
Yoast SEO for WordPress
JavaScript ★ 0 1y agoExplain → -
ai-command ⑂
Experimental repository for the CloudFest Hackathon 2025
★ 0 1y agoExplain → -
croodle ⑂
Croodle is a web application to schedule a date or to do a poll on a general topics.
JavaScript ★ 0 1y agoExplain → -
wordpress-develop-mirror ⑂
WordPress development sync to develop patches against.
★ 0 3y agoExplain → -
jetpack ⑂
Security, performance, marketing, and design tools — Jetpack is made by WordPress experts to make WP sites safer and faster, and help you grow your traffic.
★ 0 2y agoExplain → -
wordcamp.org ⑂
WordCamps are casual, locally-organized conferences covering everything related to WordPress.
★ 0 2y agoExplain → -
wordpress.org ⑂
WordPress.org Meta, Git-ified. Synced from git://meta.git.wordpress.org/ This repository is just a mirror of the WordPress Meta subversion repository. Please include a link to a pre-existing ticket on https://meta.trac.wordpress.org/ with every pull request.
PHP ★ 0 2y agoExplain → -
activepieces ⑂
Your friendliest open source all-in-one automation tool ✨ Workflow automation tool 100+ integration / Enterprise automation tool / Zapier Alternative
★ 0 2y agoExplain → -
twenty ⑂
Building a modern alternative to Salesforce, powered by the community.
★ 0 2y agoExplain → -
my-calendar ⑂
My Calendar WordPress Plugin
PHP ★ 0 2y agoExplain → -
action-wordpress-plugin-build-zip ⑂
Build a zip archive of your WordPress.org plugin using GitHub Actions
★ 0 2y agoExplain → -
query-monitor ⑂
The developer tools panel for WordPress
PHP ★ 0 2y agoExplain → -
mta-sts-cloudflare
No description.
★ 0 2y agoExplain → -
documenso
No description.
TypeScript ★ 0 2y agoExplain → -
wordpress-version-checker ⑂
A GitHub action to automatically create issues when a plugin "tested up to" version doesn't match the latest WordPress version.
★ 0 2y agoExplain → -
documenso-web
No description.
TypeScript ★ 0 2y agoExplain → -
.github ⑂
This is the .github repo for my private repositories, it houses all the community health files and my issue templates that can be shared across my different repositories.
★ 0 2y agoExplain → -
strings-web ⑂
No description.
★ 0 3y agoExplain → -
wporg-main-2022 ⑂
A block-based child theme for WordPress.org, plus local environment
★ 0 3y agoExplain → -
wordpress-playground ⑂
Run WordPress in the browser via WebAssembly PHP
★ 0 2y agoExplain → -
wordpress-develop ⑂
WordPress Develop, Git-ified. Synced from git://develop.git.wordpress.org/, including branches and tags! This repository is just a mirror of the WordPress subversion repository. Please include a link to a pre-existing ticket on https://core.trac.wordpress.org/ with every pull request.
★ 0 3d agoExplain → -
The-SEO-Framework-Extension-Manager ⑂
A WordPress plugin that manages extensions for The SEO Framework.
★ 0 3y agoExplain → -
wcvendors ⑂
The Marketplace plugin for WordPress and WooCommerce
★ 0 3y agoExplain → -
action-wordpress-plugin-asset-update ⑂
Update your plugin readme and assets in the WordPress.org repository outside of new releases
★ 0 3y agoExplain → -
action-wordpress-plugin-deploy ⑂
Deploy your plugin to the WordPress.org repository using GitHub Actions
★ 0 3y agoExplain → -
WP-Job-Manager ⑂
Manage job listings from the WordPress admin panel, and allow users to post jobs directly to your site.
★ 0 3y agoExplain → -
schemaorg ⑂
Schema.org - schemas and supporting software
★ 0 4y agoExplain → -
plausible ⑂
Plausible Analytics WordPress plugin
PHP ★ 0 2y agoExplain → -
mta-sts
No description.
★ 0 4y agoExplain →
No repos match these filters.