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I'm Ronald Reeves. I build fast, no-nonsense tools, calculators and references in English, Spanish and French, for developers, planners and anyone who needs a clear answer right now.

Popular: JSON Formatter & Prettifier Password Generator QR Code Generator Image Compressor Unit Converter Hub

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277 Tools 280 Calculators 11 Forensics 437 Reference

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Private by designMost tools run in your browser, so your files and inputs stay on your device. Lookup tools send only the query they need.

English, Spanish, FrenchEvery page is available in all three languages.

Explained, not just answeredTools come with plain-language notes and an FAQ.

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Tools

277

Formatters, converters, generators, checkers and lookups for developers, designers and IT.

Web 43 Image 37 PDF 5 Conversion 48 Network 33 Development 65 Other 46

Calculators

280

Money, health, math and network calculators with the formula shown.

Financial 87 Health 48 Math 67 Network 6 Other 72

Forensics

In-browser analyzers for images, documents, packet captures, email, logs and more.

Image Audio Network Document Binary Email Browser Video Executable System Logs

Reference

437

Cheat sheets, guides, how-tos, comparisons and a glossary.

Cheat Sheets 47 Guides 28 How-to Guides 10 Comparisons 10 Glossary 342

Blog

Notes on the tools, the math behind them and what I am building.

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JSON Formatter & Prettifier Prettify and format messy JSON instantly. Password Generator Generate high-entropy, secure passwords instantly with our free online tool. QR Code Generator Generate a downloadable QR code from any text or URL. Image Compressor Shrink an image's file size by re-encoding it at an adjustable quality level. Unit Converter Hub Convert any unit instantly. IP Address Lookup Check your IP address or query any IPv4/IPv6 address to find its geographic location.

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Mortgage Calculator The Mortgage Calculator helps estimate the monthly payment due along with other financial. BMI Calculator Calculate your Body Mass Index (BMI) and understand your health status with our. Percentage Calculator A free online percentage calculator with four modes: X% of Y, X is what % of Y. Compound Interest Calculator Calculate the estimated future value of your savings or investments with compound. Calorie Calculator Estimate your daily calorie needs using science-backed BMR equations. Age Calculator Calculate your exact chronological age from any birth date.

Learn and Look Things Up

Cheat sheets, guides, how-tos, comparisons and a glossary: quick answers and clear explanations for developers, IT people and anyone curious how things work.

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How-to Guides

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Glossary

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Cerebras Cloud Free Tier: API Setup, Quotas, and Model Comparison

Learn how to use Cerebras Cloud’s free trial with Python or the OpenAI SDK, compare model quotas, understand token limits, and test Qwen3.8 27B vs gpt-oss-120b.

Ronald Reeves

2026-10-17

Other

Status Quo Defense

A look at Status Quo Defense (statusquodefense.com), a machine-summarized open-source intelligence briefing that turns scattered defense and security news into fast, sourced briefs.

Ronald Reeves

2026-10-10

Space

Rocket Lab & Kinéis: Inside the 25-Satellite IoT Constellation

My first experience in the Rocket Lab launch operations room observing the Kinéis IoT constellation deployment, analyzing communication flows, and post-mission data archiving.

Ronald Reeves

2026-10-07