cobalt

Cobalt (cobalt.tools) is a free, open-source web application designed to let users download media content (videos, audio, photos, and GIFs) from various popular web platforms.

​Key Features & Characteristics

​Ad-Free & Privacy-Focused: Unlike many media downloaders riddled with intrusive ads, trackers, or malware, Cobalt operates with a strict zero-log, ad-free policy.

​Direct Proxying & Zero Storage: Requests are proxied directly, and files are streamed or processed without permanently caching media on their servers.

​High Quality Options: Supports downloading videos up to high resolutions (like 4K and 8K where available) and offers format flexibility (such as choosing codecs like H.264, AV1, or VP9, and audio formats like MP3).

​Local Remuxing Tool: Cobalt also provides an on-device "Remux" utility to quickly fix media container issues (e.g., missing timestamps) locally in your browser without re-encoding.

​Open Source: The project's source code is public under the AGPL-3.0 license on GitHub, meaning anyone can review the code or self-host their own instance.

​How to Use It

​Copy the URL of the media content you want (from supported sites like YouTube, TikTok, X/Twitter, Instagram, Reddit, Vimeo, etc.).

​Paste the link directly into the input field on cobalt.tools.

​Download instantly in your preferred quality and format without dealing with redirects or pop-ups.