Hourly weather dashboard for an e-ink display. Renders a 480×800px greyscale PNG via headless Chromium and serves it from GCS at a UUID-masked URL.

Chrome extension that bulk-closes related tabs with one click. Groups open tabs by site so you can zap them when you're done.

Name notes on a grand staff. Three tiers targeting ledger-line boundary notes rendered with VexFlow.

Personal website, Berlin themed.

Automated class booking for a Berlin gym. Runs daily on GitHub Actions via Playwright (required to pass the server's TLS fingerprint check). Telegram notifications, Gist-backed skip list. Includes a Tampermonkey userscript to filter classes by keyword.

Watches arzt-direkt for a Magenspiegelung opening at a Berlin gastroenterology practice and auto-books the first one found. Runs every 15 minutes on GitHub Actions, plain HTTP (no browser needed), Telegram notifications, disables its own schedule once it succeeds.

Watches MarSei Ceramics cup categories and sends a Telegram alert the moment anything restocks. Google Apps Script, no server.

Reads labeled dates from a Google Sheet and sends a weekly Telegram digest of how long it's been since (or until) each one. Google Apps Script, no server.

Interactive CLI that fills RegioJet powers of attorney for kids travelling between Berlin and Prague, from a local config — plus a German consent page for the border. One print-ready PDF.

Type or speak, they read. A full-screen large-text display for communicating with people who are hard of hearing — hold your phone up and let them read.

Apply a red tint to a selected region of an image and download the result.

Crop images to a specific output resolution. Drag to position, drag corners to resize.

Paste JSON and explore it as a collapsible tree. Live parsing with type-colored values.

Paste Markdown and see it rendered live. Copy the output as HTML or back as Markdown.

Hourly weather dashboard for an e-ink display. Renders a 480×800px greyscale PNG via headless Chromium and serves it from GCS at a UUID-masked URL.

A terminal animation that sweeps a shimmer of light across a paragraph of text. Includes a detailed walkthrough of how it works.

Interactive particle system experiments. Starts with a fountain to illustrate velocity, gravity, and lifetime.

A block puzzle game, mostly built by my son with a little help from me. Single HTML file, no dependencies.

Flashcard quiz for jazz chord voicings from a Bill Evans "Portrait in Jazz" exercise. Reveals notes and explains the harmony theory behind each chord.

Displays random major and minor scales with a visual piano keyboard. Made to help a kid study for a music test.

Name notes on a grand staff. Three tiers targeting ledger-line boundary notes rendered with VexFlow.

Generates a lock screen wallpaper for epileptics. Shows seizure instructions and medication info for bystanders and paramedics.

Chrome extension that adds a direct "Open in Google Maps" button to Google search results, working around the EU restriction that hides it.

Chrome extension to filter and close open tabs using natural language queries.

Chrome extension that bulk-closes related tabs with one click. Groups open tabs by site so you can zap them when you're done.

Chrome extension that adds a one-click "Copy Issue Key" button to Jira issue pages and board modals.

Userscript that displays the mealplan panels on schildkroete-berlin.de side by side instead of stacked.