# JPKCom — Jean Pierre Kolb

> Personal website and free online developer tools by Jean Pierre Kolb — administrator, consultant, designer & developer based in Augsburg, Germany. Over 30 years of professional experience in web technologies since 1996.

Jean Pierre Kolb is a seasoned full-stack professional covering the entire web lifecycle — from concept and UI/UX design through frontend and backend development to server infrastructure, security, SEO, and AI. With deep expertise in 50+ content management systems (WordPress, Drupal, Contao, TYPO3, and many more), Linux system administration, containerization (Docker, Kubernetes), modern web standards including accessibility (WCAG, BFSG), and AI integration (LLMs, MCP, GEO, prompt engineering, workflow automation), he delivers production-grade solutions across all layers of the stack. Previously operating under the business name JPK Commerce (est. 1999), he has been working at creationell® advertising agency since 2016.

The website offers a portfolio of professional services and a collection of 40 free browser-based tools for web developers and designers — built with the same attention to quality, security, and usability that defines his professional work. A separate, bilingual knowledge base (JPKCom DB) at /db/ adds a blog, documentation, cheat sheets, and tool docs, all served as native Markdown for AI systems and indexed in its own llms.txt.

## Main Website

- [Homepage](https://www.jpkc.com/): Portfolio and services overview — web design, CMS, development, AI, SEO, GEO, accessibility, infrastructure
- [Impressum](https://www.jpkc.com/impressum/): Legal notice and contact information (German)
- [Homepage (English)](https://www.jpkc.com/en/): English version of the portfolio
- [Imprint (English)](https://www.jpkc.com/en/imprint/): Legal notice and contact information (English)
- [Datenschutz](https://www.jpkc.com/datenschutz/): Privacy policy (German)
- [Privacy Policy](https://www.jpkc.com/en/privacy-policy/): Privacy policy (English)
- [Portfolio](https://www.jpkc.com/portfolio/): Developer tools, open-source GitHub repositories (WordPress plugins, Localproxy), and social media profiles (German)
- [Portfolio (English)](https://www.jpkc.com/en/portfolio/): Developer tools, open-source GitHub repositories (WordPress plugins, Localproxy), and social media profiles (English)

## Knowledge Base (JPKCom DB)

JPKCom DB is a standalone, bilingual (German/English) knowledge base, blog, and documentation hub. It is a separate Eleventy project with its own structure, sitemap, and llms.txt — every page is also available as native Markdown for direct, noise-free AI consumption.

- [JPKCom DB](https://www.jpkc.com/db/): Bilingual knowledge base, blog, and documentation — web development, servers, DevOps, security, AI, SEO, and GEO
- [llms.txt (JPKCom DB)](https://www.jpkc.com/db/llms.txt): Dedicated llms.txt index for the JPKCom DB knowledge base (separate from this file; refer to it for the full content listing)
- [Blog](https://www.jpkc.com/db/blog/): Articles on web development, AI, and digital practice — starting with a series on SEO and GEO
- [Cheat Sheets](https://www.jpkc.com/db/cheatsheets/): 200+ command-line references, editorially prepared as in-depth articles
- [Tools Documentation](https://www.jpkc.com/db/tools/): In-depth companion docs for the free JPKCom Developer Tools
- [Guides](https://www.jpkc.com/db/guides/): Hands-on guides to the JPKCom open-source projects
- [Changelog](https://www.jpkc.com/db/changelog/): Version histories of the JPKCom projects

## Sitemap

- [sitemap.xml](https://www.jpkc.com/sitemap.xml): Complete XML sitemap with all pages, tools, and language alternates
- [sitemap.xml (JPKCom DB)](https://www.jpkc.com/db/sitemap.xml): Separate XML sitemap for the JPKCom DB knowledge base

## Developer Tools

- [Tools Overview](https://www.jpkc.com/tools/): All 40 free online developer tools at a glance

### Code & Text Tools

- [Beautify](https://www.jpkc.com/tools/beautify/): Format and deobfuscate JavaScript, CSS, and HTML code
- [Cheat Sheets](https://www.jpkc.com/tools/cheatsheet/): 220 syntax reference sheets for CLI tools and web development (bash, zsh, git, docker, ssh, curl, npm, php, nginx, restic, rclone, borgbackup, and more)
- [Coder](https://www.jpkc.com/tools/coder/): Encode and decode HTML entities, URLs, Base64, JWT tokens, and Data URIs
- [Compiler](https://www.jpkc.com/tools/compiler/): Compile SASS/SCSS to CSS; minify and beautify HTML, JavaScript, and CSS
- [Convertor PRO](https://www.jpkc.com/tools/convertor/): Convert between HTML/XML, Unicode, UTF-8, hexadecimal, YAML, JSON, and TOML
- [CSV Editor](https://www.jpkc.com/tools/csv/): Edit and export CSV files with format auto-detection
- [JSON Editor](https://www.jpkc.com/tools/json/): Format, validate, and transform JSON data
- [Lorem Ipsum](https://www.jpkc.com/tools/lorem-ipsum/): Generate placeholder text in multiple languages and styles
- [Markdown Editor](https://www.jpkc.com/tools/md/): Write Markdown with live preview and GitHub Flavored Markdown support
- [Playground](https://www.jpkc.com/tools/playground/): Interactive HTML/CSS/SCSS/JavaScript editor with live preview and an optional in-browser PHP mode (php-wasm)
- [Regex Debugger](https://www.jpkc.com/tools/regex/): Test regular expressions with real-time pattern matching and highlighting
- [Source Viewer](https://www.jpkc.com/tools/source/): View and syntax-highlight source code for 100+ languages
- [WP Code Generator](https://www.jpkc.com/tools/wp/): Generate WordPress plugin, theme, block, and hook boilerplate code with 31 snippets
- [WYSIWYG Editor](https://www.jpkc.com/tools/wysiwyg/): Rich text HTML editor based on TipTap with Markdown import/export and syntax highlighting

### Design & Graphics

- [Colors](https://www.jpkc.com/tools/colors/): Color toolkit for web developers — color picker, gradient generator, CSS box-shadow and shadow-gradient builders, image palette extractor
- [Fonts](https://www.jpkc.com/tools/fonts/): Preview and compare Google Fonts and custom font files
- [GeoPattern](https://www.jpkc.com/tools/geopattern/): Generate geometric SVG background patterns
- [Graphic Editor](https://www.jpkc.com/tools/graphic/): Crop, scale, and convert images to PNG, JPEG, WebP, and AVIF
- [PDF Tools](https://www.jpkc.com/tools/pdf/): Create, view, edit, merge, and split PDFs in the browser — annotate, highlight, draw, fill forms, and extract text
- [Periodic Table (PSE)](https://www.jpkc.com/tools/pse/): Interactive periodic table of all 118 elements in English and German
- [Placeholder Service](https://www.jpkc.com/tools/ph/): Create custom placeholder images with configurable dimensions and colors
- [Trianglify UI](https://www.jpkc.com/tools/trianglify/): Generate low-poly triangle SVG backgrounds

### AI & SEO

- [llms.txt Generator](https://www.jpkc.com/tools/llms/): Generate and validate llms.txt files for AI model context — includes a live checker, examples, and format reference
- [Meta Tags Generator](https://www.jpkc.com/tools/meta-tags/): Generate essential, Open Graph, Twitter Card, security, and JSON-LD meta tags with live preview
- [robots.txt & Sitemap](https://www.jpkc.com/tools/robots-sitemap/): Generate robots.txt and XML sitemaps, plus live checkers to fetch and validate either file from any URL
- [SEO & GEO Analyzer](https://www.jpkc.com/tools/seo/): Comprehensive website analysis — SEO score, HTTP headers, SSL, redirects, performance, meta tags, links, images, structured data, accessibility (19 analysis modules)

### Security & Utilities

- [Cryptor (AES-256)](https://www.jpkc.com/tools/cryptor/): Client-side AES-256 encryption and decryption with password protection
- [DNS, SSL, Redirect & URL](https://www.jpkc.com/tools/dns-ssl-redirect-url/): Check DNS records, SSL certificates, HTTP redirects, and URL details
- [Cron Job Helper](https://www.jpkc.com/tools/cron/): Visual cron expression builder with presets, Web Cron, CMS/framework guides, and Docker/DDEV examples
- [Docker/Podman Composer](https://www.jpkc.com/tools/docker/): Convert docker/podman run commands to Compose YAML and back
- [IP Tools](https://www.jpkc.com/tools/ip/): IPv4/IPv6 subnet calculator, IP converter, IPv6 ULA generator, and reference
- [Generator](https://www.jpkc.com/tools/generator/): Generate passwords, BCrypt/Argon2 hashes, TOTP codes, and more
- [Hash Generator](https://www.jpkc.com/tools/hash/): Generate MD5, SHA-1, SHA-256, SHA-512, and RIPEMD-160 hashes
- [Mail Header Analyzer](https://www.jpkc.com/tools/mail-header/): Parse email headers, trace delivery routes, and check SPF/DKIM/DMARC authentication
- [PKI Viewer](https://www.jpkc.com/tools/pki/): Inspect X.509 certificates, PKCS#7/P7M, PKCS#12/PFX, CSR and keys — view details, check validity, compute fingerprints
- [SSH Proxy](https://www.jpkc.com/tools/ssh-proxy/): Generate SSH tunnel, SOCKS proxy, and port forwarding commands — SSH config, proxy settings, management scripts, autostart configs, and troubleshooting for Linux, macOS, Windows, BSD, and WSL
- [Info Tools](https://www.jpkc.com/tools/info/): Display browser capabilities, HTTP headers, and system information
- [QR Code Generator](https://www.jpkc.com/tools/qr/): Create styled QR codes from text, URLs, WiFi, vCard and more — custom dot & corner styles, color gradients, center logo, adjustable size & error correction, and SVG/PNG/JPEG/WebP export
- [Time Converter](https://www.jpkc.com/tools/time/): Convert Unix timestamps, compare time zones, and view international times
- [UUID Generator](https://www.jpkc.com/tools/uuid/): Generate RFC 4122 compliant UUIDs (v1, v4, v7, NIL, MAX)