01
Keyboard Test
Test keyboard keys, inspect repeated inputs and review a local test summary. Get clear…
Compass Test
Reads the magnetometer and shows your heading in degrees and as a compass direction, with the accuracy the device reports.
Device Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
Compass Test is a free online tool on inputtesthub.com that reads the magnetometer and shows your heading in degrees and as a compass direction, with the accuracy the device reports. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the Compass Test
- The test starts on its own — no button to press and nothing to install.
- Follow the prompt in the test panel and watch the readings update live.
- Press Reset to start over with a clean slate.
About the Compass Test
The Compass Test reads the magnetometer and shows your heading in degrees and as a compass direction, with the accuracy the device reports. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Checking why a maps application points the wrong way.
- Confirming a phone has a magnetometer at all — many budget models do not.
Where this tool stops
Many low-cost phones have no magnetometer and simulate a compass from GPS movement, which only works while you are moving. If the heading only changes when you walk, that is what is happening.
Frequently asked questions
My heading is wildly wrong.
Magnetometers are easily confused by metal and magnets. Move away from desks with steel frames, laptop speakers, magnetic phone mounts and cases with magnetic closures, then recalibrate by moving the phone in a figure of eight.
Is this true north or magnetic north?
Where the browser reports an absolute heading it is referenced to true north on iOS and usually magnetic north elsewhere. The difference, called declination, can be over ten degrees depending on where you are in the world.
Is the Compass Test free?
It is free, with no account, no trial and no daily cap. Every device tests tool on inputtesthub.com works the same way: open the page and use it.
Can you see what I put into this page?
No. The Compass Test runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What problem does the Compass Test solve?
The most common reasons people reach for it: checking why a maps application points the wrong way. Confirming a phone has a magnetometer at all — many budget models do not. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What are the limits of the Compass Test?
Many low-cost phones have no magnetometer and simulate a compass from GPS movement, which only works while you are moving. If the heading only changes when you walk, that is what is happening. Knowing where a tool stops being trustworthy matters more than the cases where it works.
Do I need to install anything to run this test?
No installation, no extension and no driver. The Compass Test uses the browser's own device APIs and begins as soon as the page loads, so there is nothing to press first. Press Reset at any point to start over with a clean slate.
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