Free
CyberChef
Open SourceEncoding & Decoding
The Cyber Swiss Army Knife: encode, decode, hash and transform data in the browser.
encoderdecoderhashbase64
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Encoding & Decoding
The Cyber Swiss Army Knife: encode, decode, hash and transform data in the browser.
Orchestration · DevOps
The open-source system for automating container orchestration.
Regex
The most popular regex tester and debugger with live explanation.
Pipelines & ETL · Data & Analytics
The standard open-source orchestrator for data pipelines.
Other Formats · Data Formats
Data serialization system commonly used with Kafka.
NoSQL · Database
Distributed, wide-column NoSQL database for massive scale.
Queues & Streaming · Database
The industry-standard distributed event streaming platform.
Dashboards & BI · Data & Analytics
Powerful open-source data exploration and visualization platform.
CI/CD · DevOps
Declarative GitOps continuous delivery for Kubernetes.
Learning & Reference · CSS Tools
Browser support tables for HTML, CSS and JavaScript features.
Design Systems · Design & Prototyping
IBM's open-source design system for products and experiences.
Text & Diff · Developer Utilities
Create and share beautiful images of your source code.
GUI Clients · Database
Open-source database manager for SQL and NoSQL with web and desktop apps.
References · Documentation & Learning
Fast, offline-capable API documentation browser combining 100+ references.
Cheatsheets · Documentation & Learning
Rico's cheatsheets: concise cheatsheets for dozens of tools and languages.
Markdown · PDF & Documents
Online Markdown editor with live preview and cloud sync.
Relational · Database
Fast in-process analytical (OLAP) SQL database, like SQLite for analytics.
Whiteboards & Diagrams · Design & Prototyping
Hand-drawn style virtual whiteboard, ideal for quick diagrams.
Practice & Challenges · Documentation & Learning
Free coding practice and mentoring in 70+ languages.
SQL Tools
Modern PostgreSQL EXPLAIN plan visualizer by Dalibo.
Learning & Reference · CSS Tools
Learn Flexbox by guiding frogs to lily pads in a fun game.
Hosting & Collaboration · Git & Version Control
Community-driven, self-hosted software forge (powers Codeberg).
Courses & Tutorials · Documentation & Learning
Non-profit curriculum with free courses and certifications.
Cheatsheets & Learning · Git & Version Control
Find the right Git commands without searching through man pages.