Calculators without the complexity.
A comprehensive suite of browser-side financial planners, health trackers, and developer utilities running completely on your terms.
No Data Leaves Your Device
Calculations run completely client-side. No inputs are uploaded, logged, or tracked. It even works offline.
Supports Google Analytics
We use standard analytical reporting to track system health and make performance tweaks.
Echo Explains Results
Get context on complex numbers. Ask Echo to translate numerical calculations into real-world insights.
Free, Supported by Ads
Every tool is free to use. Premium ad placements enable us to maintain free calculator access for everyone.
User Favorites
Top Performing Tools
Paycheck Calculator (US)
Estimate net pay, withholding, and state tax calculations for any US state.
TDEE & Calorie Calculator
Calculate your Total Daily Energy Expenditure and set ideal macro-nutrient splits.
JSON Formatter & Validator
Clean, pretty-print, and find syntax errors in your JSON structures locally.
Domain Authority Checker
Fetch domain rankings and page rank profiles from the Open PageRank registry.
Featured Desks
Explore our desks
Financial Desk
Paychecks, loans, tax, and retirement calculators — the money math, worked out in full.
Health & Fitness
TDEE, macro calculators, and BMI estimators based on formulas trainers actually use.
Developer Utilities
Clean, browser-side tools for encoding, decoding, JSON formatting, hashes, and regex.
Image Studio
Resize, crop, and convert image formats, or run client-side OCR to extract text from screenshots.
Get plain-English explanations.
Echo is the assistant designed to give calculations context. Ask it to translate your mortgage amortizations, nutritional totals, or server latency tests into clear advice.
- Zero-retention chat: Conversations are never stored.
- Context-aware: Reads calculation outputs instantly.
Insights & Guides
Top Performing Blogs
Why Client-Side Computations Matter: The Privacy Revolution
A detailed breakdown of how browser-side JavaScript eliminates the need for server-based processing privacy risks.
What Is Agentic AI? Complete Guide to Autonomous AI Agents & Architecture
A comprehensive guide to Agentic AI, exploring how autonomous AI agents work, agentic computing architecture, planning loops, tool execution, and why they differ from traditional chatbots.
Next.js vs. Remix vs. Astro: Choosing a Framework in 2026
An honest, developer-to-developer comparison of Next.js, Remix, and Astro in 2026, detailing their performance characteristics, bundle sizes, and when to use each.
Industry Updates
Trending Tech News
OpenAI Unveils Custom Inference Chip
OpenAI and Broadcom have announced a co-developed custom silicon chip manufactured by TSMC. Titled
WEF Releases 2026 Emerging Technologies Report at Summer Davos
At the Summer Davos in Dalian, the World Economic Forum released its list of the Top 10 Emerging Technologies of 2026, highlighting decentralized energy grids and lattice-based security.
Luminustools Reaches 1 Million Active Monthly Users
Luminustools has crossed the one million monthly active user milestone, solidifying the demand for privacy-first, browser-side utilities.
Featured On
Recognized by premier developer directories, platforms, and privacy-conscious communities.
