Developer Guides & Tutorials
In-depth articles on data formats, conversion, validation, networking, and developer tools — written for engineers by engineers.
XML vs JSON: Which Format Should You Use?
A practical comparison of XML and JSON. Strengths, differences, and when to choose each format.
YAML vs JSON: Which Is Better for Config Files?
Compare YAML and JSON for configuration. Comments, readability, anchors, and type handling.
What Is JSON? A Complete Developer's Guide
JSON syntax, data types, common errors, validation, and real-world usage in APIs and databases.
How to Convert CSV to JSON Online — Free & Instant
Step-by-step CSV to JSON conversion guide. Edge cases, type inference, and browser-based tools.
How to Validate XML Online — Free XML Validator Guide
Well-formed vs valid XML, common errors, escaping rules, and free browser-based auto-fix.
What Is Base64 Encoding? A Complete Developer Guide
How Base64 works, real-world use cases, Base64url variant, and the difference from encryption.
API Data Formats Explained: JSON, XML, YAML, CSV
Strengths, weaknesses, and best use cases for the four most common API data formats.
Data Transformation Techniques for Developers
Format conversion, normalisation, flattening, enrichment, filtering, and type coercion.
Best Free Data Conversion Tools for Developers in 2025
What to look for in a data conversion tool — privacy, accuracy, format coverage, and more.
CIDR Notation and Subnetting: A Complete Guide
Master CIDR, subnet masks, host ranges, private ranges, cloud VPC design, and IPv6.
XML to JSON Converter — Free, Instant, Private
How XML maps to JSON: elements, attributes, arrays, and namespaces. Convert online free.
JSON to XML Conversion: A Complete Developer Guide
Mapping rules, arrays, attributes, special characters, and root element requirements.
JSON Formatter Online — Pretty Print, Minify & Validate
Format, minify, and validate JSON. When to use pretty print vs minify, and best practices.
YAML Validator Guide — Validate and Fix YAML Online
YAML indentation rules, boolean gotchas, common errors, and free browser-based auto-fix.
How to Use a Subnet Calculator — IPv4 and IPv6 Guide
Output fields explained, cloud VPC design, security group CIDRs, and IPv6 subnetting.