INLine Computers is the home of my small independent web projects — browser tools, Chrome extensions, simple apps, games and experiments built by me, Mat, in the UK.

The aim is simple: build useful, lightweight tools that people can open quickly and use without fuss. Some projects are practical utilities, some are classroom or creator tools, and some are experimental games and side projects.

Many of the tools are designed to be privacy-conscious, with as much processing as possible happening directly in your browser rather than being uploaded to a server.

Tools and Projects

These are some of the main tools and projects currently being built or maintained under INLine Computers.

• Education

  VisualizerApp.com

  Browser-based document camera for teaching, demos and presentations. Freeze, annotate, split view and record.

  Open →
• Creator Tool

  ImgTool.app

  Create browser-based music visualizers and export videos for YouTube, Spotify Canvas and social media.

  Open →
• Input

  KeyboardTester.uk

  Check keyboard keys, modifiers, ghosting and rollover directly in your browser.

  Test →
• Input

  MouseTester.uk

  Test mouse buttons, double-click behaviour, scroll input and movement issues online.

  Test →
• Input

  GamepadTester.uk

  Test controllers, sticks, drift, buttons, triggers and gamepad input directly in the browser.

  Test →
• Display

  ScreenTester.uk

  Check dead pixels, stuck pixels, gradients, colours and quick display patterns.

  Open →
• Audio & Video

  AVTester.com

  Test audio equipment, webcams and simple AV setups directly in your browser.

  Open →
• Education

  ClassroomTimerTools.co.uk

  Simple classroom countdown timers and a clean stopwatch for teachers and group activities.

  Open →
• Security

  PasswordGeneratorTool.co.uk

  Create strong passwords quickly using a simple browser-based tool.

  Generate →
• Audio

  ChiptuneAI.app

  Small browser music tools, retro audio experiments and a WAV stems mixer.

  Open →

Early Playtest: Happy Pitch Tycoon

Chrome Extensions

I have also built and maintained a number of Chrome extensions, including tools for focus, readability and small browser utilities.

• Games Blocker — Block gaming and distraction sites to help users stay focused. 100,000+ installs.
• Dark Read — Improves readability in low-light browsing.
• Motivational Quotes Tab (MQT) — A focused new-tab page with tasks and daily quotes.
• Daily Reminder — Lightweight reminders, break timers and nudges.
• Mo To The Moon — A fun browsing odometer experiment.

Games and Experiments

Some INLine Computers projects are just fun experiments, prototypes or games made while learning and testing ideas.

• Tycoon

  Happy Pitch Tycoon

  Build and manage a cosy UK holiday park in this free browser tycoon game.

  Play →
• Puzzle

  Color Match Cube

  A relaxing colour-matching puzzle with a clean design. Free to play in your browser.

  Play →
• Hub

  Inline-Games.uk

  Central hub for browser game prototypes, experiments and playable demos.

  Visit →
• Seasonal

  Santa Claus Game

  A small festive mini-game for the holidays. Family friendly and browser based.

  Play →
• Prototype

  Marblerun65 Demo

  A marble game prototype inspired by classic marble physics games, available on itch.io.

  Download →

Dev Notes and Building with AI

I’m planning to add occasional dev notes about the projects I’m building — not a daily news blog, just honest updates when there is something useful to share.

AI tools are part of my workflow. I use them to help with planning, coding, debugging, copywriting, design ideas and learning. The final decisions, testing, publishing and project direction are handled by me.

Over time, I’d like this site to become a simple record of the journey: what I’m building, what works, what fails, and what I learn while trying to build useful independent web projects.

How this site is funded

Many INLine Computers projects are free to use. To help cover hosting, software, tools and development time, some pages may show advertising, use affiliate links, or link to optional paid versions of projects.

Where possible, I try to keep tools simple, useful and transparent about how they work.

Get in Touch

If you have a suggestion, spot a bug, or want to collaborate, I’d be happy to hear from you.

Email: [email protected]

Thanks for visiting — enjoy exploring the tools, projects and experiments.