Web Typing Speed & Accuracy Test

I need a lightweight, browser-based typing test that I can run locally or on a small personal server. Its core job is simple: present a passage, start a timer the moment I type the first character, and when I finish, report both my words-per-minute and an accuracy percentage.

Key points that matter to me
• Timer starts automatically and counts down or up while I type.
• Accuracy should compare my input against the original text in real time or on submission and flag errors clearly.
• Clean, distraction-free UI that works on both desktop and mobile browsers.
• No registration, no database—results can appear on screen only; I don’t need a leaderboard.

Feel free to build with plain HTML/CSS/JavaScript or a lightweight framework (React, Vue, Svelte—your choice). I’ll need the full source code plus a short read-me so I can host it myself.

Once delivered, I’ll run a few passages through it to confirm the timer behaves consistently and the accuracy math checks out.