Input Latency

Run a input latency check in seconds

Use this free online latency checker to press keys or click and review results instantly.

Start test Browse all tools

Live feedback Quick reset Browser based

3 Core steps

100% Browser based

Live Results

Input latency checker tool interface - measure keyboard and mouse response time

Focused testing

Run quick checks tailored for input latency.

Instant results

See updates as you test in real time.

Primary tool

Latency Checker

Use the live tool below to complete your test.

View quick tips

Latency test

Press any key while the test is active. We estimate the processing delay for each key press.

Status: Ready

Results

Current-- ms

Average-- ms

Best-- ms

Worst-- ms

Samples0

Press Start and then press keys to capture samples.

Live feedback

See results instantly

Quick reset

Run another test fast

Browser based

No installs or signups

Focused checks

Built for input latency

Input Latency

Everything you need for latency checker

Run focused checks and confirm results in seconds.

Focused insights

Track input latency with live updates.

Instant results

See changes as you test in real time.

Simple controls

Start, stop, and reset in seconds.

Repeatable tests

Compare multiple runs quickly.

Simple workflow

Three steps to run the latency checker

Follow the quick steps below to test and confirm results.

Input latency checker step 1 - open response time tester

Start the test

Open the tool and prepare to begin.

Press keys or click

to measure response time.

Input latency results - millisecond response time display

Review results

Check your input latency stats and retest if needed.

More testing tools

Explore the full suite for keyboard, mouse, audio, and utilities.

Language support: The Keyboard Tester is the only tool with translated interfaces (Arabic, Russian, Spanish, French, Portuguese, Japanese, German, Korean). All other tools are currently English-only.

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Test keyboard functionality, detect ghosting, measure latency, check for stuck keys

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Check typing speed Latency Checker

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Verify microphone input and audio levels

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Latency Checker Guide

Quick steps to run the latency checker and review your input latency results.

Start the test

Open the tool and prepare to begin.
Press keys or click to measure response time.
Reset to run another quick check.

Adjust settings if needed

Review tool options for your ideal test.
Switch inputs or settings if results look off.
Reset to run another quick check.

Review results

Look for missed inputs or delays.
Compare multiple runs for consistency.
Export or note results if required.

Why is the tool not responding?

Make sure the page is focused and the correct device is selected.

How do I reset the test?

Use the reset button to clear results and start over.

Does this work on mobile devices?

Most tools work best on desktop, but mobile may still function for basic checks.

Can I run multiple tests in a row?

Yes. Reset after each run to compare results.

Is the test private?

Testing runs locally in your browser and is not uploaded.

What should I do if results look wrong?

Try another browser or device to confirm the issue.