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cpeditor.org
CP Editor is an IDE for competitive programmers that automates compilation, execution and testing. It fetches sample test cases from competitive programming platforms and can submit solutions to Codeforces, with support for C/C++, Java and Python.
component-party.dev
Component Party is a website that compares JavaScript frameworks side-by-side, including React, Vue, Angular, Svelte and Solid.js. It shows syntax differences, features and code examples for common tasks such as reactivity, templating, styling, loops, events and conditional rendering.
curlconverter.com
Converter is a utility that converts curl commands into code for languages and libraries such as Python, JavaScript and more. Conversion happens entirely in the browser, and the site states it does not transmit or record entered curl commands.
css-tricks.com
CSS-Tricks Code Snippets is a collection of code snippets for web developers covering HTML, CSS, JavaScript, PHP, WordPress, jQuery and HTAccess. Entries are organized by category and list an author and last updated date.
decompiler.com
An online decompiler that accepts uploaded artifacts and converts them back to source code or extracted resources. It supports Java class and archive files, Python bytecode, .NET assemblies, Android packages and Flash files, among other formats.
devhints.io
Devhints is a collection of web development cheatsheets covering topics such as JavaScript, CSS, Git, Docker, and various command line tools. Each sheet is a one-page quick reference with usage examples, links, and snippets. The site also includes guidance on writing cheatsheets and on writing Vim help files.
flowchart.js.org
Flowchart.js draws SVG flowcharts from a text code definition parsed with flowchart.parse and rendered via drawSVG. Diagrams require JavaScript and use the Raphaël library. It supports symbol types including start, end, operation, subroutine, condition, inputoutput and parallel, and accepts options for styling and flow states.
freefrontend.com
A curated collection of front-end snippets intended to save time, described as practical code without fluff. The site presents examples such as buttons and checkboxes, including a frosted glass parallax button built with HTML, CSS, and JavaScript.
globster.xyz
Globster is an online tool for testing and visualizing results of glob patterns matching. Users type a glob pattern and matched files are highlighted in the tree directory structure. It uses version 3.0.4 of the minimatch JavaScript library to evaluate glob patterns. It is intended for debugging glob patterns and experimenting with provided examples.
goatcounter.com
GoatCounter is an open source web analytics platform available as a donation-supported hosted service or a self-hosted app. It reports statistics such as browser information, location, screen size, and referring sites, and identifies visits without cookies or persistently storing personal data. It can be integrated with a single script tag, a JavaScript-free image tracker, backend middleware, or log files.
codeberg.org
GotHub is an alternative front-end for GitHub written in Go, described as a work in progress. It uses no JavaScript and makes no requests to GitHub from the client side, and the project notes it is looking for new maintainers.
hexed.it
HexEd.it is a free hex editor that runs in a web browser using HTML5 and JavaScript technology. It is intended for Windows, MacOS, Linux and other modern operating systems, and lets users analyse hexadecimal binary dumps and files and read, manipulate, write, import and export byte as well as bit data.
html-css-js.com
HTML-CSS-JS.com offers a free online HTML, CSS and JavaScript editor with instant preview. The site provides a collection of online tools related to HTML, CSS and JS, which are described as the client-side parts of websites.
javadecompilers.com
JavaDecompiler provides an online interface for extracting source code from .class and .jar binary files. It presents several Java decompilers, including CFR, JD, Procyon, Fernflower and JAD, with notes on each. The site also links to an APK decompiler and a knowledge base. JAD is listed for historical reasons only.
jetbrains.com
JetBrains is a software vendor that creates intelligent development tools, including IntelliJ IDEA, an IDE for Java and Kotlin, and the Kotlin programming language. Its IDE lineup also includes PyCharm, WebStorm, DataGrip, Rider and CLion, several of which are free for non-commercial use.
avotoko.github.io
jsdfe is a JavaScript deobfuscator built on nodejs and babel. Its purpose is to make obfuscated scripts easier to read and help users understand their roughly behavior. It is not intended to reproduce the original code or output executable code. The developer created it for personal use and notes that it often terminates with an uncaught error, may go into an infinite loop, and runs target code in a VM without considering security.
kashipara.com
Kashipara is a site for downloading programming projects with source code. It lists projects in languages including Java, PHP, C# .NET, Android, VB, Python and HTML, CSS and JavaScript, along with project ideas and templates. It also lists premium or paid projects.
kdevelop.org
KDevelop is a cross-platform integrated development environment for C, C++, Python, QML/JavaScript and PHP. It parses projects to provide code completion, supports multiple projects in one session, and offers a Git plugin and documentation integration. It is available for Linux, Windows and macOS.
librespeed.org
LibreSpeed is a free and open source speedtest that runs in the browser or can be self-hosted on a PHP, Golang, Rust or Node server. It is licensed under LGPL and measures download, upload, ping, and jitter without Flash, Java, or Websockets.
liveweave.com
Liveweave is a browser-based workspace for HTML, CSS, and JavaScript with a live preview and an AI coding assistant. It also offers a Python playground, an SVG graphics editor, and a color explorer. The site hosts a showcase of user-created experiments, such as templates and a 3D bowling game.
media-chrome.org
Media Chrome is a collection of customizable web component media player controls that separate the player UI from the playback engine. It can be used with or without JavaScript frameworks and styled with CSS. The project is now part of Video.js, which offers React components, skins, and smaller bundles.
motion.dev
Motion is an animation library for React, JavaScript and Vue, previously known as Framer Motion. It provides layout, gesture, scroll, spring, exit and 3D animations, with hardware acceleration and a mini animate function starting at 3.2kb. Premium components, examples and tutorials are offered through Motion+ and the AI Kit.
openspeedtest.com
OpenSpeedTest is a browser-based HTML5 internet speed test that measures download, upload, ping, and jitter without Flash or Java. It works on phones, TVs, consoles, and computers. A free and open-source self-hosted server can be deployed, and a speed test widget can be embedded on websites or apps.