Device & Productivity— Guides & Articles

• How to Test Every Key on Your Keyboard Online

  Published 2026-07-30

  Test every key on your keyboard in your browser without installing software. See live feedback, find dead or sticky keys, and read each key's code.

  

• How to Keep Your Screen On in a Browser

  Published 2026-07-29

  A browser way to request a screen wake lock while a tab stays visible, without changing device settings. Open the page, confirm the active status, and keep…

  

• How to Generate an Invoice for Small Business

  Published 2026-07-29

  Generate a clean PDF invoice for your small business in your browser. Add line items, tax and discount, see totals live, and download with no signup.

  

• How to Make a Gantt Chart Beyond Canva

  Published 2026-07-29

  Canva isn't built for project timelines. Paste 2 to 30 task,start,end rows into a deterministic UTC Gantt chart and download the exact preview as SVG.

  

• Double Click Test Accuracy: What the Interval Really Means

  Published 2026-07-29

  Double click test accuracy describes how reliably the browser timestamps two clicks. Learn what the interval includes and excludes, and how to read it.

  

• Cross Examination Timer for Structured Debate Rounds

  Published 2026-07-29

  A cross examination timer that runs inside an ordered debate queue, so named cross-ex slots and surrounding speeches advance without manual resets.

  

• Date Duration Calculator: Calendar Days Since a Past Date

  Published 2026-07-29

  Date duration calculator that counts whole Gregorian calendar days from a named past start date, saves local snapshots, and exports PNG or CSV.

  

• Habit Tracker vs Streaks: What Each One Actually Measures

  Published 2026-07-28

  Habit tracker vs streaks: a habit tracker logs daily actions; a streak counts consecutive days. Daily Habit Counter combines both privately in your browser.

  

• Free Chess Clock: Two-Sided Timing with Fischer Increment

  Published 2026-07-28

  Run a free chess clock in your browser with a Fischer increment, undoable presses, and private daily history. No account, no upload, no paperwork.

  

• Free Basketball Scorekeeper: Track Points by Event Type

  Published 2026-07-28

  Track 1-, 2-, and 3-point events for two teams in your browser. Free basketball scorekeeper with period-based team fouls, undo, and PNG/CSV export.