| What it does | Free online calculators, converters, and developer tools that run in your browser
| Free calculators that run in your browser, with the formula next to the result
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| Stage | Startup
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| Founded | 2025
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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 | - 68 free tools across finance, development, and utilities
- Loan repayment and affordability calculators with total interest calculations
- Currency converter with 30 world currencies and live exchange rates
- JSON formatter, validator, and minifier with syntax highlighting
- Date and time tools including age calculator and timezone converter
- Runs entirely in browser with no server uploads
- Works offline after initial page load
| - Real-time calculation results
- Formulas shown beside results
- Step-by-step explanations
- Browser-based with no installation required
- Expert-written blog guides
- Mobile-friendly design
- Keyboard navigation support
- 70+ calculators across 18 categories
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| What makes it different | - No account or sign-up required
- Runs entirely client-side in your browser with no data sent to servers
- All tools are completely free with no usage limits
- Works offline after initial page load
- Privacy-first approach with no data collection or transmission
| - No account sign-up or paywall required
- Calculations run instantly in your browser with no waiting
- Data stays on your device and is never stored or sold
- Every formula verified against trusted academic and industry sources
- Free forever with no premium tier
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 7 ▲ +1 (up) since last check | 6 ● no change since last check |
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| Trust Flow (Majestic) | 3 | 2 |
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| Citation Flow (Majestic) | 35 | 16 |
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| Referring domains (Majestic) | 6 | 31 |
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CalculatorAuxo