Keyboard Test

Test your keyboard keys and functionality to ensure everything works properly

Test Mode

Visual Test Typing Test Gaming Keys Function Keys

Settings

Show Key Codes Sound Effects Track Key Timing Highlight Pressed Keys

Statistics

Keys Pressed: 0

Unique Keys: 0

Keys Working: 0

Avg Response: -

Export

Current Key Info

Key

Code

Location

Time

Virtual Keyboard

Test Area

Press any key on your keyboard to test. Keys will light up on the virtual keyboard above.

Press a key

Key information will appear here

Key Press Log

Press keys to see log entries

Features

⌨️ Visual keyboard with real-time key highlighting
🎮 Specialized gaming key testing mode
📊 Detailed key statistics and timing analysis
🔍 Key code and location information
📝 Multiple testing modes for different use cases
📋 Key press logging and history
💾 Export test results and generate reports

Use Cases

🔧 Diagnose broken or stuck keys
🎯 Test new keyboard functionality
🎮 Verify gaming keyboard responsiveness
💻 Check laptop keyboard after repairs
🧹 Test keyboard after cleaning
📈 Measure key response times
🔍 Troubleshoot input issues

6. Days Until

What it does: "Days Until" calculates how many days remain until a target date (a birthday, holiday, event). It is essentially a date-difference from today to a future date but often presented with friendly copy and optional recurrence handling for yearly events.

Features

Support recurring yearly events: if the target date this year already passed, compute days until the date next year.

Offer both exact days and a human-friendly format like "2 months and 5 days".

Countdown formatting: allow users to toggle between days-only, weeks + days, or months + days.

Example: Today is 2025-09-24 — Days until 2025-12-25 (Christmas) = 92 days.

Putting it all together — Building reliable web calculators

Here are practical tips for developers and product managers building these tools on websites and mobile apps:

Use tested date libraries. Rely on battle-tested libraries (like Luxon, date-fns, or the native Intl APIs) rather than hand-rolled date math. They handle leap years, daylight saving time, and locale formats.

Validate user input. Provide clear error messages, accept multiple formats, and sanitize all numeric input to avoid parsing errors (commas vs dots in decimals).

Provide educational context. For BMI and loan calculators, include short notes about limitations (BMI) and fees/assumptions (loans) so users understand what the outputs mean.

Accessibility. Make forms keyboard-friendly, support screen readers, and provide visible focus states. Add aria-live regions to announce results to screen reader users.

Performance and privacy. Calculations should occur client-side where possible to reduce latency and avoid storing sensitive input like birth dates or financial figures on servers unless explicitly needed.

Internationalization (i18n). Respect local number and date formats, offer metric and imperial units, and translate messages for broader reach.

Sample HTML form (simplified)

<form id="percentage-form"> <label>Base: <input name="base" type="number" step="any" /></label> <label>Percentage: <input name="percent" type="number" step="any" /></label> <button type="submit">Calculate</button> </form>

Attach client-side JS to compute results instantly and show them inside an accessible result container.

Design & SEO considerations

These calculator pages are highly searchable. Follow these quick SEO tips:

Provide clear titles and meta descriptions (as used in this page).

Use structured data (Schema.org) where appropriate — for example, FAQ schema if you include common questions about the calculators.

Offer shareable results or a printable summary for users who want to save calculations or share with advisors.

Include internal links between calculators (users often transit between percentage calculators, loan calculators and BMI pages).

Conclusion

Age, Percentage, Loan, BMI, Date Difference, and Days Until calculators are simple but powerful tools that deliver immediate value. When implemented carefully — with correct formulas, clear UX, accessibility, and privacy considerations — they can significantly improve user engagement and trust. Developers should prefer reliable libraries for date and numeric handling, clearly document assumptions, and provide helpful explanations so users can understand and act on their results.

If you’d like, I can also provide ready-to-use JavaScript snippets for any of the calculators above (for example, a full amortization table script for the Loan Calculator or a BMI widget with unit toggles). Tell me which one you want first and I’ll include a copy-pasteable implementation.

Keyboard Test

Test Mode

Settings

Statistics

Export

Current Key Info

Virtual Keyboard

Test Area

Key Press Log

Features

Use Cases

Example algorithm (days)

6. Days Until

Features

Putting it all together — Building reliable web calculators

Sample HTML form (simplified)

Design & SEO considerations

Conclusion