The free and flexible app for your private thoughts.

Obsidian (/ əbˈsɪdi.ən, ɒb -/ əb-SID-ee-ən ob-) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous …

Obsidian has been used across history to make weapons, implements, tools, ornaments, and mirrors. Because of its conchoidal fracture (smooth curved surfaces and sharp edges), the …

Obsidian is a powerful knowledge base and note-taking app that works with local Markdown files. Known for its flexibility and user-friendly features, it's perfect for students, researchers, writers, …

Obsidian is available on all major platforms. Download Obsidian for iOS, Android, macOS, Windows and Linux.

1 day ago · Enhanced Customization and Usability The October 2025 update reflects Obsidian’s commitment to providing flexible, user-centric solutions for data organization and visualization.

Nov 27, 2023 · Unlock the power of Obsidian with this ultimate beginner's guide, from setup to advanced note-taking and knowledge management techniques.

Obsidian is a proprietary personal knowledge base and note-taking application that operates on markdown files. [4][5][6] The software is free for personal and commercial use; only the offered …

‎Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files. It is a second brain, for you, forever. Now available on the go for iOS! Features include: - …

Jan 22, 2024 · With rich customization options, plug-ins galore, and the ability to connect notes in a network-like structure, Obsidian is a note-taking app best suited for power users.