Test your USB sticks for fakes, slow speed and hidden errors.
FakeUSBCheck helps you verify the real capacity and stability of USB flash drives. Run a fast browser-based check in minutes or unlock the Pro mode for deep surface tests, inspired by tools like f3 and badblocks.
Quick USB check
Example device: 64 GB USB 3.1 flash drive
How FakeUSBCheck works
FakeUSBCheck combines a safe, browser-based quick check with an optional Pro mode. The browser mode focuses on performance and basic integrity. The Pro mode, supported by a small helper app on your computer, can run deep capacity and surface tests similar to established tools like f3 or badblocks.
Select your USB drive
Choose the folder on your USB flash drive you want to test. The browser never sees other drives or folders – you stay in control of what is accessed.
Run the quick browser check
FakeUSBCheck writes a configurable amount of test data, reads it back and calculates checksums. You see write and read speeds, plus a basic integrity result for the tested area.
Unlock Pro mode for deep tests
In Pro mode you install a small helper application that can perform full-drive surface scans, fake capacity detection and extended stress tests, while FakeUSBCheck provides the dashboard and reporting.
Designed for safety, speed and clarity
FakeUSBCheck focuses on giving you a clear result: is this drive worth trusting? All tests are designed to be understandable, with transparent metrics and optional in-depth reports for advanced users.
Quick browser check
Start a quick test directly from your browser – no installation required. Ideal before copying important data or using a new drive for the first time.
- • Test presets: 200 MB, 2 GB, 8 GB
- • Write & read throughput in MB/s
- • Checksum-based integrity verification
Pro capacity verification
Detect fake capacity drives that claim unrealistic gigabytes or terabytes. The Pro helper app can run full media scans while the web dashboard visualizes progress and results.
- • Detection of over-reported capacity
- • Optional full surface scan
- • JSON report & PDF export
Clear reports
Every test produces a human-readable summary and a technical report. That makes it easy to document defective devices or prove that a drive behaves as expected.
- • Simple “OK / Warning / Failed” status
- • Detailed logs for advanced users
- • Optional sharing link for support
Free quick check or Pro deep analysis
Start with the free browser-based quick check. If you need full-drive verification, repeated test runs or PDF reports, upgrade to Pro. No subscription is required for basic checks.
Free quick check
Ideal for a fast sanity check of a new USB stick before you trust it with important files.
€0
- • Browser-based test, no install
- • Basic write & read speed measurement
- • Configurable test size (up to a limit)
- • Simple “OK / Warning / Failed” result
Pro deep check
For power users, IT support and anyone buying larger batches of USB drives who needs reproducible, documented test results.
Planned
- • Helper app for Windows, macOS & Linux
- • Full-drive surface tests & capacity verification
- • Detailed performance statistics and logs
- • PDF and JSON export for documentation
Built with privacy and data safety in mind
Your data on the USB drive is sensitive. FakeUSBCheck is designed so that you stay in control at every step. The browser-based quick check never uploads your test data. Only aggregated test results are sent to our servers – and only if you explicitly agree.
The optional Pro helper runs locally on your device and only talks to our API using secure, encrypted connections. You can review exactly what is being sent and revoke access at any time.
We do not sell your test results to third parties. Anonymous statistics may be used to improve detection of common fake models and to warn users about frequently abused brands.
Security highlights
- • Browser quick check: test data stays on your device
- • Optional upload of summarized results only
- • Pro helper: TLS-encrypted communication
- • Transparent logs so you can see what happened
- • No hidden “phone home” behaviour
Detailed privacy and security documentation will be available before the Pro mode leaves beta. Our goal: you should be able to explain to a non-technical friend exactly what FakeUSBCheck does – and what it doesn’t do.
Frequently asked questions
A few common questions about testing USB flash drives and how FakeUSBCheck fits into your workflow.
Can FakeUSBCheck damage my USB drive?
Any write test puts some wear on flash memory. The quick check is designed to use a reasonable test size so that the wear stays minimal for healthy drives. The Pro mode can perform heavy tests; those are intended for situations where you specifically want to stress-test a drive or check a suspicious device.
Do I have to install anything for the free quick check?
No. The browser-based quick check runs entirely inside your browser, using modern APIs that allow you to work with files and folders on your USB drive with your explicit consent. You only need to install the Pro helper if you want deep, full-drive tests.
How reliable is the detection of fake capacity drives?
Detecting fake capacities requires writing and reading large portions of the drive. The Pro mode is specifically designed for this type of validation. While no tool can guarantee 100% detection of all possible manipulation techniques, deep surface tests provide strong evidence and clear documentation when a drive behaves incorrectly.
Can I test external SSDs or only USB sticks?
The quick browser check focuses on USB flash drives, but in practice it works with any storage that appears as a normal folder, including some external SSDs. The Pro helper can work with a broader range of devices, including USB-connected SSDs and some memory cards, depending on your operating system.
Ready to see if your USB sticks are real?
Start a free quick check in your browser. No account, no installation. If you need more, Pro mode will be ready soon – with full-drive tests and exportable reports.