Free online developer tools

Free utilities for everyday coding: format and validate JSON, encode and decode Base64 and more, with nothing to install and no sign-up.

JSON formatter
Pretty-print, validate and minify JSON, with syntax error hints.
Open
Base64 encoder
Convert text to Base64 and Base64 to text, including accents and emoji.
Open

Utilities for everyday coding

Formatting an API response so you can read it, finding the comma that breaks a config file or decoding a Base64 string are small jobs that interrupt your work several times a day. Here you paste the text and get the answer, without installing extensions or opening a terminal.

The data is processed in your browser and these tools do not send it to any server, which matters when what you paste comes from a real environment. Even so, avoid pasting keys or passwords into any web page: it is a good habit.

Developer tools

JSON formatter

Base64 encoder

Utilities for everyday coding