# cobalt
Best way to save content you love.

Live: [co.wukko.me](https://co.wukko.me/)

![cobalt logo with repeated logo pattern background](https://raw.githubusercontent.com/wukko/cobalt/current/src/front/icons/pattern.png "cobalt logo with repeated logo pattern background")

[![Crowdin](https://badges.crowdin.net/cobalt/localized.svg)](https://crowdin.com/project/cobalt) [![DeepSource](https://deepsource.io/gh/wukko/cobalt.svg/?label=active+issues&token=MsmsJ9zUOKwcQor0yaiFot84)](https://deepsource.io/gh/wukko/cobalt/?ref=repository-badge) [![DeepSource](https://deepsource.io/gh/wukko/cobalt.svg/?label=resolved+issues&token=MsmsJ9zUOKwcQor0yaiFot84)](https://deepsource.io/gh/wukko/cobalt/?ref=repository-badge)

## What's cobalt?
cobalt is a social media downloader with zero bullshit. It's friendly, efficient, and doesn't bother you with shock ads or privacy invasion "consent" popups.

It tries to preserve original media quality, and in most cases you get best quality possible (you can set your preferences in settings).

## Supported services
| Service           | Video + Audio | Only audio | Additional features                                                                       |
| --------          | :---:         | :---:      | :-----                                                                                    |
| Twitter           | ✅           | ✅         | Ability to save multiple videos/GIFs from a single tweet.                                 |
| Twitter Spaces    | ❌️           | ✅         | Audio metadata.                                                                           |
| YouTube & Shorts  | ✅           | ✅         | Support for 8K, 4K, HDR, and high FPS videos. Audio metadata & dubs. h264/av1/vp9 codecs. |
| YouTube Music     | ❌           | ✅         | Audio metadata.                                                                           |
| Reddit            | ✅           | ✅         | GIFs and videos.                                                                          |
| TikTok & douyin   | ✅           | ✅         | Video downloads with or without watermark; image slideshow downloads without watermark.   |
| SoundCloud        | ❌           | ✅         | Audio metadata, downloads from private links.                                             |
| bilibili.com      | ✅           | ✅         |                                                                                           |
| Tumblr            | ✅           | ✅         |                                                                                           |
| Vimeo             | ✅           | ❌️         |                                                                                           |
| VK Videos & Clips | ✅           | ❌️         |                                                                                           |

## cobalt API
cobalt has an open API that you can use for free. It's pretty straightforward to use, [check out the docs](https://github.com/wukko/cobalt/blob/current/docs/API.md) and see for yourself.

## How to contribute translations
You can translate cobalt to any language you want on [cobalt's crowdin](https://crowdin-co.wukko.me/). Feel free to ignore QA errors if you think you know better. If you don't see a language you want to translate cobalt to, open an issue, and I'll add it to crowdin.

### Translation guidelines:
- Avoid formal language. Leave it for big and classy tech companies. Use informal language wherever possible.
- Strings are **ALWAYS** stylized as lowercase unless it's STRESSED LIKE THIS or is an internal value like `{ContactLink}`.
- Keep translations lively, friendly, and fun. Translate strings as if the user was your buddy.
- Automatic translations from original language are not valid, and will be ignored.
- You can (and should) rephrase sentences as long as they keep the same point, if you think it'd be better that way.
- You can add wordplays or puns if it feels natural to do so.
- Even though I love cursing, keep that to minimum in translations, and do **NOT** use any offensive words.
- Check if there are issues in UI with your localization, and optimize it accordingly, or open an issue.
- Add "(in english)" translated to your language at the end of `ChangelogLastCommit`, `ChangelogLastMajor`, and `ChangelogOlder`. Those are always kept exclusively in English (for now), due to how often changelog changes.
    - Sample translation to Russian: `"ChangelogLastCommit": "последний коммит (на английском)"`
- Be nice.

## Host an instance yourself
You might find cobalt's source code a bit messy, but I do my best to improve it with every commit.

### Requirements
- Node.js 14.16 or above
- git

### npm modules
- cors
- dotenv
- esbuild
- express
- express-rate-limit
- ffmpeg-static
- got
- node-cache
- url-pattern
- xml-js
- youtubei.js

Setup script installs all needed `npm` dependencies, but you have to install `Node.js` and `git` yourself.

1. Clone the repo: `git clone https://github.com/wukko/cobalt`
2. Run setup script and follow instructions: `npm run setup`
3. Run cobalt via `npm start`
4. Done.

## Disclaimer
cobalt is my passion project, so update release schedule depends solely on my motivation, free time, and mood. Don't expect any consistency in that.

## License
cobalt is under [AGPL-3.0](https://github.com/wukko/cobalt/blob/current/LICENSE) license.

[Fluent Emoji](https://github.com/microsoft/fluentui-emoji) used in the project is under [MIT](https://github.com/microsoft/fluentui-emoji/blob/main/LICENSE) license.