Blog
Guides and tutorials on developer tools, privacy and the web.
Comparing two texts line by line
Spot what changed between two versions of a text or file, and read a diff without getting lost
Regular expressions by example
Learn regex through real cases - email, date, postal code - and test them without sending anything online
Decode a JWT online, without leaking your data
Understand the structure of a JSON Web Token and decode it in your browser, without ever sending it to a server.
Format and validate JSON online, privately
Indent, validate and fix JSON right in your browser, without sending your data to a third-party server.