| What it does | Measure anything on your screen with pixel-perfect accuracy
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| Pricing model | Free
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| Key features | - Smart Auto-Detect identifies your device from a database of 100+ profiles
- Three calibration methods: auto-detect, screen diagonal, and credit card
- Place rulers on any edge of the screen in any combination
- Click-to-measure distances in any direction
- Live cursor position tracking
- Dark mode with automatic system preference detection
- Support for four measurement units: cm, mm, inches, and pixels
| - 150 tools across 9 categories
- Local file processing in browser
- Image metadata viewing and removal
- Barcode and QR code generation
- Practical workflow guides
- No installation or account required
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| What makes it different | - No installation required—runs entirely in your web browser
- Achieves near pixel-perfect accuracy typically within 0.5mm for well-calibrated screens
- Completely free with no ads, account, or limitations
- Calibration saved locally so no need to recalibrate on each visit
- Works on tablets and mobile devices with touchscreen support
| - All file processing happens locally in your browser with no data sent to servers
- Tools show visible limits and require review before download or sharing
- Clear, focused tools designed for one specific job each
- Practical guides explain workflows and what to review before sharing
- Created and maintained by its founder as a solo project
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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) | 8 ▲ +4 (up) 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) | 17 | 17 |
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| Referring domains (Majestic) | 4 | 2 |
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Online Ruler
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