Utils holds open-source helpers for everyday developer tasks. Cheerio parses and manipulates HTML and XML; ConvertX is a self-hosted file converter for many formats; Gum adds clearer UI to shell scripts. Reach for this list when you need focused libraries rather than full applications.
The most popular open-source Utils tool by GitHub stars is The Book of Secret Knowledge(214.5k stars), followed by Skills(115.2k stars)and Screenshot-to-Code(72.2k stars). This page lists the top 30 of 79 utils tools in the directory, ranked by community adoption.
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | The Book of Secret Knowledge A comprehensive collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, and a variety of CLI/web tools to enhance your knowledge. | 214.5k | — | MIT License |
| 2 | Skills A public repository by Anthropic providing a collection of modular, reusable developer skills and utilities. | 115.2k | Python | — |
| 3 | Screenshot-to-Code Effortlessly convert your UI screenshots into clean code for HTML, Tailwind, React, and Vue applications. | 72.2k | TypeScript | MIT License |
| 4 | Prometheus The Prometheus monitoring system and time series database for collecting and storing metrics as time series data. | 63.5k | Go | Apache License 2.0 |
| 5 | Dayjs Day.js is a 2kB immutable date-time library, providing a modern API as a lightweight alternative to Moment.js. | 48.6k | JavaScript | MIT License |
| 6 | MinerU MinerU is a high-quality, open-source tool that enables one-stop data extraction, specifically designed to convert PDF documents into Markdown and JSON formats. | 40.9k | Python | GNU Affero General Public License v3.0 |
| 7 | Marked A fast and efficient markdown parser and compiler, built for speed and flexibility in rendering markdown into HTML. | 36.7k | JavaScript | Other |
| 8 | Date-fns ⏳ A modern JavaScript date utility library that provides comprehensive, lightweight functions for date manipulation. | 36.5k | TypeScript | MIT License |
| 9 | SWR A set of React Hooks for data fetching, aiming for high performance and efficiency. | 32.3k | TypeScript | MIT License |
| 10 | Cheerio The fast, flexible, and elegant library for parsing and manipulating HTML and XML efficiently. | 30.3k | TypeScript | MIT License |
A comprehensive collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, and a variety of CLI/web tools to enhance your knowledge.
A public repository by Anthropic providing a collection of modular, reusable developer skills and utilities.
Effortlessly convert your UI screenshots into clean code for HTML, Tailwind, React, and Vue applications.
The Prometheus monitoring system and time series database for collecting and storing metrics as time series data.
Day.js is a 2kB immutable date-time library, providing a modern API as a lightweight alternative to Moment.js.
MinerU is a high-quality, open-source tool that enables one-stop data extraction, specifically designed to convert PDF documents into Markdown and JSON formats.
A fast and efficient markdown parser and compiler, built for speed and flexibility in rendering markdown into HTML.
⏳ A modern JavaScript date utility library that provides comprehensive, lightweight functions for date manipulation.
A set of React Hooks for data fetching, aiming for high performance and efficiency.
The fast, flexible, and elegant library for parsing and manipulating HTML and XML efficiently.
Immer is a JavaScript library that allows you to work with immutable state by mutating the current state, simplifying state management in your applications.
A lightweight, dependency-free JavaScript library for guiding user focus by highlighting elements on the page.
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simdjson is a high-performance JSON parser capable of parsing gigabytes of JSON per second. It is utilized by major projects such as Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, and StarRocks.
Gum is a tool that brings a glamorous touch to shell scripts, making them visually appealing and user-friendly.
Convert PDF files to Markdown and JSON formats quickly and with high accuracy, suitable for diverse data extraction needs.
A structural diff tool that understands syntax, highlighting changes in a detailed and precise manner.
A flexible and extensible library for building complex drag and drop interfaces in React applications.
Normalizr is a powerful utility for normalizing complex nested JSON objects according to a defined schema, enhancing efficiency in data handling and state management.
Suna is an open source generalist AI agent designed to handle a wide range of tasks autonomously.
A lightweight and powerful fuzzy-search library written in JavaScript. It facilitates searching through large collections efficiently, providing a simple interface for developers.
A powerful tool for enhancing the capabilities of Blender by providing modular control and presets, facilitating efficient management of 3D assets and projects.
A toolkit designed for converting and linearizing PDFs to create datasets optimized for large language model (LLM) training and evaluation.
An exhaustive Pattern Matching library for TypeScript, offering smart type inference for TypeScript developers.
A zero-config, drop-in animation utility that adds smooth transitions to your web app. It seamlessly integrates with modern JavaScript frameworks like React and Vue.
A tool to download pictures and videos from Instagram, capturing captions and metadata effortlessly.
A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller than lodash.
pdfplumber is a powerful Python library for extracting detailed information from PDF files, including text, tables, individual characters, shapes, and more. It allows precise programmatic access to underlying PDF content, making it highly useful for data extraction, automation, and analysis tasks.
Effect is an ecosystem of powerful tools designed to build robust applications in TypeScript.
Video-based AI memory library for storing millions of text chunks in MP4 files with lightning-fast semantic search, eliminating the need for a traditional database.
A utility for handling type-safe errors in JavaScript and TypeScript, enabling robust error handling and improved code quality.
The Book of Secret Knowledge leads by GitHub stars(214.5k). A comprehensive collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, and a variety of CLI/web tools to enhance your knowledge.
Yes. Every tool on this list is open source and free to use in your own projects. Many can be self-hosted.
Tools are ranked by GitHub star count, a strong proxy for community adoption and active maintenance. Star counts are refreshed regularly.
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