CodBolt Blog

How Things Work — and Why They Don't

Free guides on JSON and data formats, calculators, colour and randomness — the thinking behind the tools.

JSON Tools 5 min

JSON Format vs Minify vs Validate — What's the Difference?

JSON Tools 7 min

How to Compare Two JSON Files and Find Every Difference

JSON Tools 8 min

How to Convert Nested JSON to CSV Without Losing Data

JSON Tools 8 min

How to Convert JSON to XML — Arrays, Attributes & Root Names

JSON Tools 8 min

How to Convert JSON to YAML Safely (The Norway Problem)

Calculator Tools 8 min

How Much Do You Need to Retire? The 4% Rule Isn't Your Answer

Color Tools 7 min

How to Find a Color's Name from Its Hex Code

JSON Tools 7 min

Why Your JSON Is Full of Backslashes — and When That's Correct

JSON Tools 6 min

Why Your Valid JSON Won't Parse — and How to Unwrap It

JSON Tools 7 min

JSON to Excel: One Row per Record, or One per Array Item?

Random Tools 8 min

Is a Virtual Coin Flip Actually Fair?

Random Tools 8 min

Why Your Random Number Generator Keeps Repeating Numbers

Random Tools 7 min

Why 7 Comes Up Most Often When You Roll Two Dice

Random Tools 7 min

Does Entering Twice Double Your Chances in a Random Draw?

JSON Tools 7 min

What Gets Lost When You Convert YAML to JSON

Calculator Tools 6 min

How Many Hours Are in a Week? (And Why Payroll Uses 2,087)

Calculator Tools 7 min

How Many CM in an Inch? Exactly 2.54 — and Here Is Why

Image Tools 9 min

Why Your Downloaded YouTube Thumbnail Has Black Bars

Calculator Tools 10 min

How to Calculate Stairs: The Formula Is Four Lines

Calculator Tools 10 min

How to Raise Your GPA (And Why It Gets Harder Every Term)

Calculator Tools 11 min

Pregnancy Week by Week: Why You Are Two Weeks Pregnant Before You Conceive

Color Tools 11 min

Colour Mixing Chart: What Two Colours Actually Make

Encoding & Decoding 15 min

What Is Base64? And Why It Is Not Encryption

Number Tools 11 min

Roman Numerals 1 to 100: The Chart, and the Rules Behind It

Image Tools 10 min

Passport Size Photo Size: 35 × 45 mm, and What That Is in Everything Else

Image Tools 17 min

JPG vs PNG: PNG Is Not Better Quality. It Is Lossless.

CSV Tools 10 min

What Is a CSV File? And What Excel Does to It

Generators 12 min

Strong Password Examples — and Why You Should Not Use One

Color Tools 10 min

Color Wheel Theory: Your Screen and Your Paint Set Disagree