Guides
Guides for Text, Data and Developers
Practical guides on JSON, encoding, tokens, regex, hashing and data formats. Each guide links to the free tools that put the concepts into practice.
Data & JSON
JSON Formatting Best Practices
Learn how to format JSON correctly, fix common syntax errors, choose indentation and use minify/sort keys safely.
Read guide →Encoding
Base64 Encoding Explained
What Base64 is, when to use it, how URL-safe encoding works, and why it is not encryption.
Read guide →Developer
JWT Structure and Claims Explained
Learn how JWT header, payload and signature work, what exp/iat/nbf mean, and why decoding is not verification.
Read guide →Developer
Regex Cheat Sheet for Common Patterns
A practical regex cheat sheet: flags, groups, lookarounds, common patterns and debugging tips.
Read guide →Developer
MD5 vs SHA-256: Which Hash Should You Use?
Compare MD5, SHA-1 and SHA-256 for checksums, integrity and security, and learn when each is appropriate.
Read guide →Data & JSON
CSV vs JSON: When to Use Each
Compare CSV and JSON for tabular data, APIs and nested structures, with conversion tips and common pitfalls.
Read guide →Text
How to Remove Line Breaks from Copied Text
Clean up text copied from PDFs, emails and documents by removing hard line breaks and extra whitespace.
Read guide →Text
Social Media Character Limits
Current character limits for X/Twitter, SMS, meta titles and descriptions, Instagram and LinkedIn, with a free counter.
Read guide →