Chart.js is an open source JavaScript charting library for the modern web, described as simple yet flexible. It supports eight animated and customisable chart types and renders on HTML5 Canvas across modern browsers, redrawing charts on window resize. Version 4.0 added a colors plugin and tree-shaking to reduce bundle size.
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A GreasyFork userscript, also listed on GitHub, that exports the chat history of ChatGPT. It supports copying as text and exporting as screenshot, Markdown, HTML and JSON, and an Export All option handles many conversations at once. Installation requires Tampermonkey and enabled user scripts in browser settings.
ChillOuts is an online meditation and relaxation aid with real-time composed music and drifting light visuals. It uses HTML5 in modern browsers, and sound support on many tablets and phones is limited.
ChipTone is a free tool for generating sound effects, mainly for games. It runs in HTML5 and has Windows and macOS downloadable versions. The tool is in development, with work on the sampler and sequencer. Sounds created with it are free to use under the CC0 licence.
A simple pip-installable Python tool to generate your HTML citation world map from your Google Scholar ID.
Curated list of classless CSS themes and frameworks for styling semantic HTML quickly.
ClipAngel is a clipboard manager that captures clipboard objects and lets the user select and paste one into any program. It supports text, HTML, RTF, file and image clipboard formats. History is stored encrypted on disk, and it requires .NET Framework 4.52 or later.
A Codeberg repository holding the source of paranoiaprivacy.wiki, a collection of hand-written privacy guides. The site is plain HTML and CSS with no build step, JavaScript, analytics or external requests. The repository has been archived, so files can be viewed and cloned but not changed.
Online code playground for testing HTML, CSS, and JavaScript snippets in the browser.
A site dedicated to Unicode and related topics, including characters, glyphs and internationalization. It provides reference pages on IANA character sets, Unicode planes, blocks, character categories, bidirectional and combining classes, decomposition mappings, mirrored characters, scripts and HTML entities.
Compress Video Online is a free browser-based tool that cuts and compresses video files to a chosen output size while attempting to preserve quality. Files are processed locally in the browser using HTML5 and FFMPEG JS, so no upload or software installation is required, and output includes no watermark. It supports formats such as MP4, WEBM, MOV, FLV, and MKV.
ConvertCSV.com is a collection of online tools for converting CSV and Excel data to and from formats such as JSON, XML, SQL, YAML, KML, GeoJSON, HTML, Markdown and PDF. It also provides a CSV viewer and editor, a CSV validator, SQL querying and data extraction tools. The tools run on the client side, so data never leaves the computer.
Copycat is a browser extension for copying content from web pages. It supports Chrome, Edge and an old Firefox version, and can copy tab titles, links and selections as plain text, HTML, Markdown and other formats. Images, audio and video can also be copied in some formats.
CopyQ is a clipboard manager with editing and scripting features. It monitors the system clipboard, saves content in customized tabs, and supports text, HTML, images and other formats. Items can be browsed, filtered, sorted, edited, tagged and pasted into applications using shortcuts. It is available for Linux, Windows and OS X 10.15+.
Creature Mixer is a browser-based HTML5 tool for creating characters from the free Pixel Platformer asset package. Users browse category tabs, select parts, position them with arrows, and pick colors from a palette. Creations may be used in personal, educational and commercial projects, excluding NFT or blockchain projects. A separate sprite package is sold for $10 USD or more.
A free browser-based tool for cropping video files, using HTML5 and JavaScript so files are processed locally without upload. Users set the cropping area with the mouse or by entering values and can set start and end times. Output format can be configured, and supported formats include MP4, WEBM, MOV, FLV, MKV and AVI.
CS50 is Harvard University's introduction to computer science and programming, intended for students with or without prior experience. It covers computational thinking, abstraction, algorithms and data structures, and programming in C, then Python, and later SQL, HTML, CSS and JavaScript, ending with a final project. The material is available free online through OpenCourseWare over eleven weeks.
CSS Bed is a collection of classless CSS themes intended as starting points in web development. The site presents themes by name and notes that classless themes are responsive, have good browser support, are small, and require no learning curve for HTML users.
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.
DailyScript is a collection of movie scripts and screenplays presented in proper script format, with multiple drafts where possible. It is intended as a resource for writers, actors and people who enjoy reading movie scripts. One script is featured daily, and a separate scripts section offers more titles. Scripts are in HTML or PDF format.
This arXiv paper proposes an end-to-end scalable architecture for early identification of new Tor sites and daily analysis of their content. It is built on an open source big data stack including Kubernetes, Kafka, Kubeflow and MinIO, discovering onion addresses across several sources, downloading HTML from Tor, deduplicating with MinHash LSH and categorizing with BERTopic modeling. In 93 days it identified 80,049 onion services and characterized 90% of them.
Dash is a free online course from General Assembly that teaches the basics of web development through projects done in the browser. The course covers HTML5, CSS3 and JavaScript, including layout, styled landing pages and dynamic interfaces.
An interactive web map that visualizes the 650 gigabyte Geocities backup made by the Archive Team on October 27, 2009. It arranges file-system neighborhoods and individual lots by file count, showing relative sizes when viewed in full and individual HTML pages when zoomed. Based on the 2012 installations The Deleted City 1.0 and 2.0.
DenCode is an online tool platform focused on encoding and decoding operations. It supports a wide range of formats including HTML Escape, URL Encoding, Base64, MD5, SHA-1, and CRC32, alongside tools for string, number, date and time, color, and hash processing. The site offers interface support for multiple languages.