| What it does | Free on-screen measuring tools that run in your browser
| Free browser tools for random picks, printable practice, wheels and data conversion
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Actual-size ruler in cm, mm and inches
- Bank-card and screen-diagonal calibration
- Top, left and right rulers with drag-to-measure readout
- Full-screen mode and browser-zoom warning
- Image measurement tool
- Length unit converter
- Touch dragging support for phones and tablets
- Local storage of calibration without server uploads
| - Random Number Generator with customizable range and quantity
- Random Letter Generator for A–Z selection
- Random State Generator for 50 U.S. states
- Random Number Wheel with editable options and weights
- Worksheet Generator for fraction practice and handwriting
- Country Wheel with 193 UN member states
- Truth or Dare Wheel with family-friendly prompts
- JSON to CSV Converter with delimiter and BOM options
- UUID Generator for v4 or v7 with multiple options
- Cursive Generator for Unicode text conversion
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| What makes it different | - Calibration step compensates for browsers' inability to detect physical display size
- ISO/IEC 7810 ID-1 standard bank card calibration ensures reproducible accuracy
- All calculations run locally in your browser with no data sent to servers
- Works on any device with a browser and JavaScript enabled
- Content follows standards-based principles with no invented precision or fake reviews
| - Everything runs locally in your browser without server uploads
- No account or sign-up required
- Continuous tool corrections and FAQ pages with examples
- Uses browser cryptographic random source with rejection sampling
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| Free plan | Not given
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| Open source | Not given
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| Platforms | 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) | 2 | 0 |
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| Citation Flow (Majestic) | 18 | 0 |
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| Referring domains (Majestic) | 10 | 0 |
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Online Ruler
FPSDEN