EthicalFusion

📚 The Blog

Guides, tips and how-tos for getting the most out of free online tools.

Guides · Jun 6, 2026
Unit Conversion Cheat Sheet: Length, Weight, Volume, Speed and Data

Km to miles, kg to pounds, litres to gallons, Mbps to MB/s — the conversions everyone needs, with quick approximations and exact free converters.

Guides · Jun 5, 2026
BMI, BMR and Water Intake: The Health Numbers Worth Tracking (and Their Limits)

What BMI, BMR, ideal weight and daily water intake actually measure, what they miss, and free calculators for each.

Guides · Jun 5, 2026
Change Uppercase to Lowercase (and Back) Instantly — Free Case Converter

Fix CAPS LOCK paragraphs, make Title Case headlines, or convert to sentence case in one click — without retyping a single word.

Guides · Jun 5, 2026
How to Calculate Percentage: Formulas, Examples and Mental Math Shortcuts

The three percentage formulas everyone mixes up, reverse percentage for discounts, and mental math tricks — with a free calculator.

Guides · Jun 4, 2026
EMI, SIP and Compound Interest Explained — With Calculators for Each

The three money formulas every Indian household should understand — EMI, SIP and compound interest — explained with worked examples and free calculators.

Guides · Jun 4, 2026
How to Create a Strong Password You Can Actually Remember

What actually makes a password strong, why length beats complexity, and how to generate and manage passwords you never have to memorise.

Guides · Jun 4, 2026
The 7 Most Common JSON Errors (and How to Fix Them Fast)

Unexpected token? Trailing comma? Single quotes? The seven JSON mistakes behind 90% of parse errors, with fixes and a free validator.

Guides · Jun 3, 2026
15 Free Developer Tools That Replace a Dozen Browser Tabs

JSON formatting, Base64, JWT decoding, hash generation, regex testing and more — the everyday developer utilities, all in one place and all running locally.

Guides · Jun 3, 2026
Binary to Text Translator: How to Decode Binary Code (With Examples)

How computers turn 1s and 0s into letters, how to convert binary to text and back, and free translators for binary, hex and Morse.

Guides · Jun 3, 2026
How to Merge PDF Files for Free (No Upload, No Watermark)

Combine multiple PDFs into one document without uploading them to anyone's server — the private way to merge applications, invoices and scans.

Guides · Jun 2, 2026
Merge, Split and Compress PDFs Free — Without Uploading Your Documents

Most online PDF tools upload your files to their servers. These run entirely in your browser — safer for contracts, ID proofs and bank statements.

Guides · Jun 2, 2026
Live Currency Converter: How Exchange Rates Work and How to Convert Money

Convert any currency at live rates, understand why the rate you get differs from Google, and avoid the hidden fees that quietly eat your money.