Chris Collis' Tools

A web-based tool that calculates width and height dimensions while preserving a specified aspect ratio. It features a visual preview, common presets, and a copy-to-clipboard function.

A comprehensive health tool designed to calculate Body Mass Index with support for both Metric and Imperial systems, featuring real-time unit synchronization and visual health feedback.

An interactive dashboard designed to track and visualize Claude's 5-hour rolling token refresh window, helping users manage their usage limits effectively.

A standalone HTML/React tool for formatting and printing address labels on A4 envelopes. It generates a PDF with centered, left-aligned text suitable for direct printing.

An interactive, whimsical soundboard featuring custom SVG renders of 'Suits' characters, able to say the phrase 'Goddamn'.

A standalone HTML interface for the Google Jules API (v1alpha).

A browser-based tool that converts rich text and HTML content into clean Markdown syntax, preserving headers, lists, links, and tables.

A whimsical web utility to compare corporate purchase budgets with standard-issue MacBook (£1,000 each). It features dual-input synchronization, URL state preservation for sharing, a visual interactive laptop fleet showing sliced fractional computers, and customizable badge designs ready to snip or export.

A single-page application that provides instant currency conversion from Moroccan Dirham (MAD) to British Pounds (GBP) with a clean, responsive interface.

An interactive utility designed for NHS staff to quantify the financial value of time spent in meetings based on official 2026/27 Agenda for Change pay scales.

A high-fidelity, sci-fi themed Minesweeper game featuring a neon-noir aesthetic, responsive grid mechanics, and persistent floating tactical controls.

Converts photos into a cell-shaded style SVG with distinct color bands and black outlines.

Advanced vectorization tool with fine-grained resolution control and extended path simplification ranges for ultra-abstract outputs.

A web-based tool that uses Google's Gemini API to extract contact information from photos of business cards and generate vCard (.vcf) files.

A lightweight, mobile-first web application for tracking protein intake with 24-hour time formatting, persistent local storage, and validated entry editing.

A comprehensive take-home pay comparison tool designed for the UK tax system (2023-2027), allowing users to analyze the impact of raises, pension contributions, and tax year changes on their net income.

A responsive single-page application for calculating sourdough bread ingredient weights based on target hydration and flour mass. Features 'Smart Calculation' to account for starter composition.

A specialized timer and progress tracker for sourdough baking that monitors the dough lifecycle and persists data across sessions.

A presentation tool for Town Hall meetings that combines a PDF slide viewer with a live, scrolling ticker-tape for staff shout-outs.

A real-time URL encoder and decoder with automatic detection of encoded content, designed for developers and power users.

A comprehensive playground for the Web Speech API's SpeechSynthesis interface, enabling users to experiment with system voices, speech rate, and pitch in real-time.