How to format and validate JSON
Format, minify and validate JSON, and read the parser errors that tell you where a document is broken.
Related tool: JSON Formatter & Validator
Guides
Short, practical guides that explain the ideas behind each tool, with examples you can try straight away.
How to compare two JSON files
Find what was added, removed or changed between two JSON documents, such as before and after an API change.
Related tool: JSON Diff Checker
How to convert CSV to JSON
Turn CSV rows into JSON objects, and handle quotes, delimiters and headers correctly.
Related tool: CSV to JSON Converter
What is a JWT and what does decoding show?
Learn how a JSON Web Token is built, what its header and payload contain, and why decoding does not prove it is genuine.
Related tool: JWT Decoder
What is Base64 used for?
Understand what Base64 is for, where it is used, and why it does not protect data.
Related tool: Base64 Encoder & Decoder
URL encoding explained
Why spaces and special characters are percent-encoded in URLs, and when to use component or full-URL encoding.
Related tool: URL Encoder & Decoder
How to compress PNG and JPEG images
Choose a format, set the right quality, and reduce image size without spoiling how the picture looks.
Related tool: Image Compressor