| What it does | Free calculators and file tools that run entirely in your browser
| Date, deadline and time calculators with visible assumptions and sources
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Word and character counter
- PDF merge and manipulation tools
- Image compression and format conversion
- Currency converter with live exchange rates
- JSON formatter and validator
- Recipe scaler for cooking measurements
- Percentage and fraction calculators
- Time zone converter and date calculations
- Health calculators for BMI and TDEE
- Local browser processing with no uploads
| - 184 calculators across 53 categories
- Shows counting rules and assumptions with each result
- Local-first processing with no data sent to servers
- Holiday and weekend calendar selection
- Business day counting
- Date arithmetic (add or subtract days, weeks, months, years)
- Sleep cycle planner with NIH-based 80-100 minute cycles
- Time zone conversion with DST handling
- Save results as images or add to calendar
- Schengen visa 90/180 day rolling window auditing
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| What makes it different | - All processing happens locally in your browser with no file uploads to servers
- Completely free with no accounts, login requirements or hidden payments
- No tracking or advertising, with optional cookie-free analytics only
- Comprehensive guides and explanations for every tool and calculation
- Independently maintained by a single developer focused on quality and accuracy
| - Shows the source and counting rule beside every answer
- No sign-up or account required to use any calculator
- All inputs stay in your browser for privacy
- Comprehensive coverage across 53 life and work categories
- Higher-risk calculators include prompts to verify with professionals
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ● 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) | 17 | 0 |
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| Referring domains (Majestic) | 4 | 0 |
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ToolsNow
CalcSpan