Developer
The Essential Developer Toolkit: 10 Must-Have Online Tools
A curated list of essential online developer tools for daily use in 2026, with practical use cases and links to try them out.
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Tips, guides, and tutorials for our free online tools.
Developer
What Is a JWT? How to Decode and Inspect JSON Web Tokens
Learn what JSON Web Tokens are, their structure, and how to safely decode and inspect JWTs for debugging and security analysis.
Developer
UUID v4 — Why Random UUIDs Matter and How to Generate Them
Understand UUID v4 random identifiers, why they're essential for distributed systems, and how to generate them reliably for your applications.
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How to Remove Duplicate Lines from Text — Methods and Free Tool
Learn multiple methods to remove duplicate lines from text files and strings, including command line tools, programming approaches, and our free online deduplication tool.
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URL Slugs Explained — How to Create SEO-Friendly Slugs
Learn what URL slugs are, why they matter for SEO, and how to generate clean, user-friendly slugs for your website or blog.