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AddYou likely use css backgrounds in every site you build. You give an element a background color and tell another element to let a background image repeat. How much do you know about all the other background properties?
Hi. You can get started by creating a new button, selecting a template to modify, or login to access saved buttons.
Responsive CSS3 Slider Without Javascript*
Generate clothoid rounded corners by CSS clip-path
CSS.coloratum is a nifty little tool that helps you:
Share colors with friends and colleagues (never have to go through describing a shade again, just give them the link!)
Check out what RGB & HSL values correspond to that color keyword you keep using
Covert HSL to RGB, because you're done with your prototype and now it has to work in IE8 too
...and much more!
The CSS Crush script takes one CSS file as input, scans for @import directives, and includes them directly in the output file so no http requests are wasted.
Useful CSS custom functions using the new @function rule
Interactive CSS Flexbox Learning Tool.
Experiment with different flex properties to understand how they affect layout. Adjust the controls below to see changes in real-time and copy the generated CSS code.
cssFx is a standalone polyfill that inserts the vendor-specific CSS3 properties necessary for old and new browsers. This saves you tons of time, maintenance, and bandwidth! Check it out:
700+ CSS Icons, Customizable, Retina Ready & API. Open-source CSS, SVG and Figma UI Icons.
Available in SVG Sprite, styled-components, NPM & API.
CSS Gradient Generator -demo coding
The coveted CSS3 Gradient Generator has undergone a redesign and moved to its new home within the CSS3 Factory. It has maintained all of it's tools and functions but looks even better now. The redesign enhances the generator's usability and I will be adding even more advanced functions soon.
This project is a way for people to use CSS Grid features quickly to create dynamic layouts.
You can set the numbers, and units of your columns and rows, and I'll generate a CSS grid for you! Drag within the boxes to create divs placed within the grid.
CSS gradients using CSS colors functions introduced in 2023.
Hello, and welcome to CSS Hell, where you will be subjected to 15 unimaginably torturous CSS puzzles. "What did I do to deserve this?", you ask. But you know perfectly well: you blashpemized Cascading Style Sheets. I saw that time your friends were complaining about CSS and you piled on with "CSS isn't even a real programming language"
A collection of popular CSS layouts and patterns that you can use right away
The Braid Design System believes UI (User Interface) components should not provide surrounding white space. For example, a list item having a margin below it to add a gap between itself and the next item. This margin breaks component encapsulation, making it harder to use. A well-built component should not affect anything outside itself.
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Your CSS goes here. The more, the better. Linting works best when we see the big picture, so give us everything you've got.
A general situation that we all might face while going through websites/apps is to wait for some progress or something to get loaded. A most simple solution in such scenarios is to use a loader or spinner to indicate users that something is loading in the background. Considering this, I tried to create a library having a collection of such loaders/spinners. There are no image dependencies for this library. It's developed using pure CSS. Hence it will load fast and is easily customizable too.
This is a library having a collection of different types of CSS loaders, spinners. A general situation that we all might face while going through websites/apps is to wait for some progress or something to get loaded. A most simple solution in such scenarios is to use a loader or spinner to indicate users that something is loading in the background. Considering this, I tried to create a library having a collection of such loaders/spinners. There are no image dependencies for this library. It's developed using pure CSS. Hence it will load fast and is easily customizable too.
Simple tool written in vanilla Javascript to generate a plasma background for your website.
This is a simple trick to overlay a grid or a mock-up over a page you're styling. It will also allow you to edit content directly in the browser to see how your layout behaves depending on various lines of text.
A free visual guide to the most popular CSS properties.
Learn by example: cssreference.io is a free visual guide to CSS. It features the most popular properties, and explains them with illustrated and animated examples.
Shadow Palette Generator
Create a set of lush, realistic CSS shadows.
Test your CSS Skills.
Enter the CSS selector, which applies to all elements with an arrow ➡️ and press enter or the submit button.
The timer will start once you correctly solved the first puzzle.
A tool set for CSS including fast detailed parser, walker, generator and lexer based on W3C specs and browser implementations.
CSSTree is a tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations. The main goal is to be efficient and W3C spec compliant, with focus on CSS analyzing and source-to-source transforming tasks.
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csstyle is a modern approach for crafting beautifully maintainable stylesheets. The csstyle method is implemented using a set of SASS mixins that make your CSS readable and semantic, generate your selectors for you, and automatically handle things like specificity and nesting.
The AI-Powered browser extension for managing colors in CSS Variables
- AI-generated color palettes
- Accessibility testing
- Support for daisyUI and shadcn/ui
CSS Warp is a web app that lets you create text aligned to a path in HTML and/or SVG easily
An opinionated CSS starter kit for your "nobuild" application.
An opinionated CSS starter kit for your Ruby on Rails application. You can think of it like a "no build" Tailwind CSS.
Convert CSV & Excel to Clean, Structured Data — Instantly
Drop your files in. Get perfect JSON, XML, or CSV in seconds. No code, no setup — just fast, browser-based data conversion.
csvkit is a suite of command-line tools for converting to and working with CSV, the king of tabular file formats.
It is inspired by pdftk, GDAL and the original csvcut tool by Joe Germuska and Aaron Bycoffe.
It provides in2csv to convert xlsx to csv, and csvsql to populate a database with a csv file contents.
csvkit is a suite of command-line tools for converting to and working with CSV, the king of tabular file formats.
Run SQL queries on CSV files directly in your browser. No data leaves your browser. Fast, private, and easy to use.
🔽 Display any CSV (comma separated values) file as a searchable, filterable, pretty HTML table
A collection & lists of intel and usernames scraped from various cybercrime sources & forums. DarkForums, HackForums, Patched, Cracked, BreachForums, OGUser, XSS, Dread, & more.
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Exploration into public Certificate Transparency Logs.
Real-time Certificate Transparency log explorer. Watch newly issued TLS certificates appear as they're published to public CT logs. CertTrack monitors Certificate Transparency logs in real-time, showing you newly issued TLS certificates as they appear. You can watch the stream of certificates, filter by domain, and explore the details of each certificate.
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concise commandline monitoring for containers.Top-like interface for container metrics.
ctop provides a concise and condensed overview of real-time metrics for multiple containers.
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Cut the noise. Keep the signal.
One install wires Claude Code, Codex, Cursor, and 11 more. ctx-wire runs their commands, compresses the noisy output, scrubs secrets fail-closed, and hands back a short result. The full log stays on disk for when something actually fails.
macOS & Linux Containers for Computer-Use AI Agents on Apple Silicon. Run Docker Containers for Computer-Use AI Agents on Apple Silicon.
TL;DR: c/ua (pronounced "koo-ah", short for Computer-Use Agent) is a framework that enables AI agents to control full operating systems within high-performance, lightweight virtual containers. It delivers up to 97% native speed on Apple Silicon and works with any vision language models.
Build, benchmark, and deploy agents that use computers.
Open-source infrastructure for Computer-Use Agents. Sandboxes, SDKs, and benchmarks to train and evaluate AI agents that can control full desktops (macOS, Linux, Windows).
Cube is a system for collecting timestamped events and deriving metrics. By collecting events rather than metrics, Cube lets you compute aggregate statistics post hoc. It also enables richer analysis, such as quantiles and histograms of arbitrary event sets. Cube is built on MongoDB and available under the Apache License on GitHub.
📊 Cube — The Semantic Layer for Building Data Applications. The Universal Semantic Layer.
Build trust with a semantic layer. Connect siloed data, define consistent metrics, and power AI and analytics with context.
Cube is the semantic layer for building data applications. It helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application.
Cube was designed to work with all SQL-enabled data sources, including cloud data warehouses like Snowflake or Google BigQuery, query engines like Presto or Amazon Athena, and application databases like Postgres. Cube has a built-in relational caching engine to provide sub-second latency and high concurrency for API requests.
CUBE CSS is a CSS methodology that’s orientated towards simplicity, pragmatism and consistency. It’s designed to work with the medium that you’re working in—often the browser—rather than against it.
A Cloud Native Distributed Storage System.
CubeFS is a new generation cloud-native open source storage system that supports access protocols such as S3, HDFS, and POSIX. It is widely applicable in various scenarios such as big data, AI/LLMs, container platforms, separation of storage and computing for databases and middleware, data sharing and protection，etc.
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Empowering your AI Agents. Instant, Concurrent, Secure & Lightweight Sandbox Service for AI Agents.
Cube Sandbox is a high-performance, out-of-the-box secure sandbox service built on RustVMM and KVM. It supports both single-node deployment and easy scaling to multi-node clusters. It is compatible with the E2B SDK and can create a hardware-isolated, fully serviceable sandbox in under 60ms with less than 5MB of memory overhead.
The Official Web Site for Cubic (Custom Ubuntu ISO Creator).
Cubic permits effortless navigation through the ISO customization steps and features an integrated virtual command line environment to customize the Linux file system. You can create new customization projects or modify existing projects. Important parameters are dynamically populated with intelligent defaults to simplify the customization process.