flynt is a command line tool to automatically convert a project's Python code from old "%-formatted" and .format(...) strings into Python 3.6+'s "f-strings".
Shaarli plugin to easily insert markdown syntax into the Description field when editing a link.
Free tool to unminify (unpack, deobfuscate) JavaScript, CSS, HTML, XML and JSON code, making it readable and pretty. The tool works locally in your browser, no data is uploaded to the server.
FormatExpress is an easy-to-use online formatter where you simply paste some bunch of raw XML, JSON, CSS or SQL, to get it automatically beautified. The most common use-case is to help reading minified input found in logs or web services.
Rich is a Python library for rendering rich text and beautiful formatting to the terminal.
The Rich API makes it easy to add colorful text (up to 16.7 million colors) with styles (bold, italic, underline etc.) to your script or application. Rich can also render pretty tables, progress bars, markdown, syntax highlighted source code, and tracebacks -- out of the box.
UTF-8 enabled. Does word wrapping and justification. Markdown rendering. Exports a print() function virtually identical in usage to Python's regular one. Console objects can be instantiated to give more control over what is displayed.
A Python module for formatting things in a human-friendly way. Parses and formats numbers, file sizes, pathnames, lengths of time. Includes timer functionality. Implements lists of options for user input. ANSI friendly.
Official documentation for Github's version of Markdown text formatting. This can be used in the wiki, in tickets, in comments... it's all in one place.
json is a command line utility for working with JSON-formatted data on the command line. At its most basic it'll take JSON data, reformat it so that it's easier to work with, and display it in the terminal. It can also be used to extract only certain bits of data from a JSON stream, lint and debug JSON, and filter input in various ways.
Requires node.js, though it isn't a web app.
How to prettify a block of JSON in vim so that it's easier to read. You need to have Python installed for it to work.
XML XPath development formatting correctness validation debugging extraction testing
A free book about golang and best practices. formatting syntax modules packages programming
python module that converts html into markdown. Can be used programmatically.