Guides
Learn the concept, then use the tool.
DevToolBox Guides are practical landing pages for developer workflows. Each guide explains the concept, highlights common mistakes, and points you straight to a tool you can use locally in the browser.
Explanations, examples, troubleshooting patterns, and direct paths into the tools that solve the actual task.
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How to Format JSON Without Breaking It
Learn how to pretty-print, validate, and minify JSON safely, with examples of common syntax mistakes and a formatter you can use immediately.
How to Decode a JWT Token Safely
Understand the structure of a JWT, decode header and payload locally, and avoid common mistakes when inspecting tokens.
Regex Explained for Developers Who Need Practical Patterns
A practical introduction to regular expressions, how matching works, and how to debug patterns without guessing.
Unix Timestamp Explained Without the Usual Confusion
Understand Unix timestamps, seconds vs milliseconds, and how to convert between epoch values and readable dates.
JSON vs YAML: When to Use Each Format
A practical comparison of JSON and YAML for APIs, configs, and developer workflows, including examples and conversion tips.
Cron Expression Explained with Practical Examples
Learn how cron syntax works, read common schedules, and verify the next run times before deploying jobs.
Hash vs Encryption: The Difference Developers Actually Need
A practical explanation of hashing, encryption, and when each one belongs in a developer workflow.
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JSON & Data
Browse practical explainers and examples connected to tools in the json & data cluster.
Security & Auth
Browse practical explainers and examples connected to tools in the security & auth cluster.
Dates & Time
Browse practical explainers and examples connected to tools in the dates & time cluster.
Text & Regex
Browse practical explainers and examples connected to tools in the text & regex cluster.
URL & Web
Browse practical explainers and examples connected to tools in the url & web cluster.
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How to Format JSON Without Breaking It
Learn how to pretty-print, validate, and minify JSON safely, with examples of common syntax mistakes and a formatter you can use immediately.
How to Decode a JWT Token Safely
Understand the structure of a JWT, decode header and payload locally, and avoid common mistakes when inspecting tokens.
Regex Explained for Developers Who Need Practical Patterns
A practical introduction to regular expressions, how matching works, and how to debug patterns without guessing.
Unix Timestamp Explained Without the Usual Confusion
Understand Unix timestamps, seconds vs milliseconds, and how to convert between epoch values and readable dates.
JSON vs YAML: When to Use Each Format
A practical comparison of JSON and YAML for APIs, configs, and developer workflows, including examples and conversion tips.
Cron Expression Explained with Practical Examples
Learn how cron syntax works, read common schedules, and verify the next run times before deploying jobs.
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JSON & Data
3 guides in this topic cluster.
How to Format JSON Without Breaking It
Learn how to pretty-print, validate, and minify JSON safely, with examples of common syntax mistakes and a formatter you can use immediately.
JSON vs YAML: When to Use Each Format
A practical comparison of JSON and YAML for APIs, configs, and developer workflows, including examples and conversion tips.
Invalid JSON Examples and How to Fix Them
See the most common invalid JSON patterns, why parsers reject them, and how to repair payloads quickly.
Security & Auth
3 guides in this topic cluster.
How to Decode a JWT Token Safely
Understand the structure of a JWT, decode header and payload locally, and avoid common mistakes when inspecting tokens.
Hash vs Encryption: The Difference Developers Actually Need
A practical explanation of hashing, encryption, and when each one belongs in a developer workflow.
Bcrypt Password Hashing for Real-World Apps
Why bcrypt exists, when to use it, and what developers should understand about salts, work factor, and verification.
Dates & Time
2 guides in this topic cluster.
Unix Timestamp Explained Without the Usual Confusion
Understand Unix timestamps, seconds vs milliseconds, and how to convert between epoch values and readable dates.
Cron Expression Explained with Practical Examples
Learn how cron syntax works, read common schedules, and verify the next run times before deploying jobs.
Text & Regex
2 guides in this topic cluster.
Regex Explained for Developers Who Need Practical Patterns
A practical introduction to regular expressions, how matching works, and how to debug patterns without guessing.
Common Regex Patterns You Will Reuse Constantly
A quick reference for common regex patterns, what they do, and what to watch out for before copying them into production.
URL & Web
1 guides in this topic cluster.