ToolzYard Blog

Developer guides, tutorials, and practical workflows

Developer Guides

ToolzYard Blog

Longer-form pieces on the things that catch people out: why large integers lose precision when they pass through JSON, what actually broke in MD5, why decoding a JWT proves nothing, and why the country code for Norway keeps breaking YAML config files.

JSON Basics • Updated July 10, 2026

What is JSON? A Beginner Friendly Guide for Developers

Learn what JSON is, how it works, and why developers use it for APIs, apps, and structured data exchange.

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JSON Guide • Updated July 10, 2026

How to Format JSON Online Without Installing Any Software

Learn how to beautify messy JSON, validate structure, and work faster with formatted API data.

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JSON Guide • Updated July 10, 2026

How to Validate JSON and Fix Common Syntax Errors

Understand validation errors, broken commas, quotes, brackets, and how to fix invalid JSON quickly.

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Comparison Guide • Updated July 10, 2026

JSON vs YAML: What’s the Difference and When Should You Use Each?

A practical comparison of JSON and YAML for APIs, configuration files, and developer workflows.

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Conversion Guide • Updated July 10, 2026

How to Convert JSON to CSV for Excel and Google Sheets

Turn JSON arrays into spreadsheet-friendly CSV output for reporting, exports, and analysis.

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Conversion Guide • Updated July 10, 2026

How to Convert CSV to JSON for APIs and Web Apps

Convert spreadsheet-style CSV data into clean JSON objects for APIs, apps, and testing.

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JSON Guide • Updated July 10, 2026

How to Use JSONPath to Find Values in Large JSON Responses

Learn how to query nested JSON data, extract values faster, and inspect large API payloads with JSONPath.

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JWT Guide • Updated July 10, 2026

JWT Decode vs JWT Verify: What’s the Difference and Why It Matters

Understand the difference between reading a JWT token and actually verifying whether it can be trusted.

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Encoding Guide • Published June 26, 2026

Base64 Encoding Explained: How It Works and When to Use It

How Base64 works byte by byte, why output grows ~33%, the role of padding, and why it is not encryption.

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Identifiers Guide • Published June 26, 2026

What Is a UUID? UUID v4 Explained with Examples

The UUID format, how version 4 is generated, why collisions are effectively impossible, and UUID vs GUID.

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Security Guide • Published June 26, 2026

Hashing vs Encryption: MD5, SHA-256, and AES Explained

One-way vs reversible: when to hash, when to encrypt, and the right tool for passwords, integrity, and secrecy.

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Text & Regex Guide • Published June 26, 2026

Regex Cheat Sheet: Common Patterns Every Developer Should Know

Metacharacters, quantifiers, anchors, and groups, plus copy-ready patterns for email, URLs, dates, and more.

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Security Guide • Published June 26, 2026

How to Create a Strong Password (and Why Length Beats Complexity)

Why length beats complexity, how passphrases and entropy work, and the habits that actually keep accounts safe.

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