Developer Tools
How to Test Regular Expressions Before You Ship Them
A practical workflow for testing regex against edge cases, catching catastrophic backtracking, and avoiding the bugs that only show up in production.
7 min read
17 articles
Developer Tools
Practical guides and in-depth tutorials about developer tools.
Developer Tools
Regex vs a Parser: When Pattern Matching Breaks Down
A clear decision framework for when regex is fine and when you need a real parser, with concrete examples of where pattern matching silently fails.
6 min read
Developer Tools
Base64URL Encoding: When You Actually Need It and Why
Standard base64 breaks in URLs and filenames because of +, /, and = characters. Here's when to use base64url instead and how to convert between them correctly.
5 min read
Developer Tools
How to Debug a Slow Regex: Fixing Catastrophic Backtracking
A regex that hangs on certain input isn't a fluke — it's catastrophic backtracking. Here's how to identify it, reproduce it safely, and rewrite the pattern to fix it.
5 min read
Developer Tools
How to Validate a UUID String in JavaScript (Correctly)
A regex that only checks the shape misses version and variant bits. Here's a proper UUID validator in JavaScript, including how to check for a specific version.
6 min read
Developer Tools
When to Use Nanoid Instead of UUID (And When Not To)
Nanoid is shorter, URL-safe, and customizable — but it's not a drop-in UUID replacement. Here's exactly when nanoid wins and when UUID is still the right call.
5 min read
Developer Tools
How to Compare Two UUIDs Without Leaking Timing Info
Naive string comparison of UUIDs can leak information through timing side channels. Here's when it matters and how to compare securely in JavaScript, Python, and Go.
6 min read
Developer Tools
JSON Schema Draft Versions: Which One Should You Target?
Draft-07, 2019-09, or 2020-12? A practical breakdown of what changed between JSON Schema drafts and which version to target for new projects.
5 min read
Developer Tools
How to Safely Stringify Circular References in JSON
Fix 'Converting circular structure to JSON' errors with a custom replacer, WeakSet tracking, or structuredClone — without losing your data.
5 min read
Developer Tools
When to Use NDJSON Instead of a JSON Array
NDJSON beats a JSON array for streaming, logs, and large datasets you process line by line. Here's the exact decision rule and format.
7 min read
Developer Tools
15 Essential Frontend Developer Tools for 2025
15 essential frontend developer tools for 2025, covering image optimization, JSON formatting, encoding, and SEO utilities that speed up your daily workflow.
4 min read
Developer Tools
Mastering Browser DevTools
Level up your debugging skills with expert tips and real-world use cases for browser devtools, including optimization and performance enhancement
3 min read
Developer Tools
JSON Path Query Guide
Master JSON path queries with examples and optimize your JSON data with DevDockTools' json-formatter and json-validator.
3 min read
Developer Tools
Generate UUID in Node.js, Python, and Browser
Learn how to generate UUID in Node.js, Python, and browser with 99.99% uniqueness, using 128-bit UUIDv4, reducing collision chance to 1 in 2^122
3 min read
Developer Tools
Validate JSON in JavaScript and TypeScript
Learn how to validate JSON data in JavaScript and TypeScript with a meaningful amount accuracy using JSON_validator and try it online with DevDockTools
3 min read
Developer Tools
Format JSON in Editor
Learn how to format and prettify JSON in any editor for better readability, using online tools and code examples, and spend less time debugging.
3 min read
Developer Tools
JSON Formatting Best Practices: A Developer's Complete Guide
Master JSON formatting, validation, and best practices. Learn how to structure, validate, and debug JSON data efficiently using browser tools and code.
4 min read