Is UnitCert really free?

Yes. UnitCert is 100% free for individual device testing. You can run unlimited hardware tests and generate up to 25 certified reports per month at no cost. Pro and Business plans are available for teams needing batch testing, CSV export, and custom templates.

Do I need to download anything?

No. UnitCert runs entirely in your browser. There's nothing to download, install, or configure. Just open the website and start testing.

What devices does UnitCert support?

UnitCert supports Chromebooks, Windows laptops, and MacBooks. Each device type has a customized test suite that covers keyboard, trackpad, screen, camera, microphone, speakers, touch screen, and network diagnostics.

How does report verification work?

Every UnitCert report includes a unique verification ID (starting with UC-). Anyone can enter this code or paste the report link on our verification page to confirm the diagnostic results are authentic and unaltered.

Can I test multiple devices at once?

Yes. UnitCert Pro includes batch testing mode where you can create a batch, share a single test link with your team, and track progress across all devices from a central dashboard. Export results as CSV for your records.

How to Test a Used Chromebook Before Buying

This complete guide walks you through testing a used Chromebook before buying it, using UnitCert's free browser-based diagnostic tool. Buying a used Chromebook can save you money, but only if the hardware is in good working condition.

Step-by-Step Testing Process

Step 1: Open UnitCert Chromebook test in any browser on the Chromebook you want to test
Step 2: Select Chromebook as your device type to load the optimized test suite
Step 3: Run the keyboard test — UnitCert prompts you to press each key and verifies that every key registers correctly
Step 4: Run the screen test — full-screen color patterns help identify dead pixels and display defects
Step 5: Run the camera test to verify the built-in webcam produces a clear image
Step 6: Run the network test to check Wi-Fi connectivity and measure connection speed

Your Certified Report

After completing all tests, UnitCert generates a certified diagnostic report with a unique verification ID starting with UC-. The report shows pass or fail results for each test along with an overall grade from A to F.

Understanding Your Grade

Grade A — All hardware tests passed; device is in excellent condition
Grade C or F — One or more hardware failures; be cautious before buying

Share the report with the seller or save the verification ID for your records. Anyone can verify the report's authenticity by entering the UC- code. Also see our laptop testing guide and MacBook testing guide.