| What it does | Measure anything on your screen with pixel-perfect accuracy
| 1000+ free online tools that run entirely in your browser
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| Stage | Not given
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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
| - 1000+ free tools across multiple categories
- All tools run entirely in the browser with no uploads
- No sign-ups or accounts required
- Tools work offline after loading
- Image editing tools including PNG to JPG conversion
- PDF compression without uploading files
- Financial calculators including mortgage calculator
- Text comparison and analysis tools
- Developer utilities for JSON, code formatting and data validation
- Comprehensive guides and tutorials for tool usage
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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
| - Complete privacy: all processing happens on your device with zero data uploads
- Verifiable client-side architecture users can inspect in Network tab
- No sign-ups, accounts, or artificial limits with no pro tier
- Continuously maintained tools tested against real files and real browsers
- Guides written with verified facts and checked numbers, not marketing claims
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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) | 1 ● no change since last check | 18 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 5 |
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| Citation Flow (Majestic) | 17 | 23 |
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| Referring domains (Majestic) | 4 | 57 |
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Online Ruler
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