| What it does | Free online device tests and calculators that run in your browser with nothing to install or upload
| Compare two lists to find differences, matches, and near-duplicates
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| Pricing model | Free
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| Key features | - Microphone testing with live input levels and recording
- Speaker and headphone testing with frequency sweeps
- Webcam testing with resolution and frame rate display
- Keyboard testing for dead, stuck and double-typing keys
- Mouse and controller testing with button and drift detection
- Typing speed and CPS measurement tools
- Date and time calculators with formatting options
- Number to words converter in multiple formats
- Privacy by design with no data sent to servers
| - Support for multiple file formats: XLSX, XLS, ODS, CSV, TXT, and spreadsheet pastes
- Multiple output formats: side-by-side, combined, items only, or whole rows
- Copy or download results as TXT or CSV
- Save workflow settings on device for repeated comparisons
- View match details to inspect source rows and matching rules applied
- Processes lists in browser without uploading data
- Handle large datasets: test with 100,000 or 1,000,000 lines
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| What makes it different | - No installation, account or data upload required
- Works on all devices and browsers without downloads
- Automated testing with 15,000+ checks before each release
- Complete privacy with all processing done on your device
| - All processing happens in your browser, so your lists never leave your device
- Free to use with no sign-up required
- Flexible matching rules that adapt to your data: case sensitivity, spaces, hidden characters, and leading zeros
- Works with data from Excel, Google Sheets, and plain text without any conversion needed
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| Open source | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 0 |
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DeviceCheckHub
List Matcher