Supported Schemes
0io.io supports any valid URI scheme. The following schemes have enhanced metadata — custom titles, descriptions, and Open Graph tags tailored to each type.
Communication
| Scheme | Example | Description |
|---|---|---|
mailto: | mailto:hello@example.com | Opens the default email client |
tel: | tel:+1234567890 | Opens the phone dialer |
sms: | sms:+1234567890 | Opens the messaging app |
facetime: | facetime:user@example.com | Starts a FaceTime video call |
facetime-audio: | facetime-audio:user@example.com | Starts a FaceTime audio call |
Messaging Apps
| Scheme | Example | Description |
|---|---|---|
whatsapp: | whatsapp://send?phone=1234567890 | Opens a WhatsApp conversation |
tg: | tg://resolve?domain=username | Opens a Telegram chat |
slack: | slack://channel?team=T123&id=C456 | Deep links into Slack |
Developer Tools
| Scheme | Example | Description |
|---|---|---|
vscode: | vscode://file/path/to/project | Opens a file or project in VS Code |
ssh: | ssh://user@host | Opens a terminal SSH session |
Meetings
| Scheme | Example | Description |
|---|---|---|
zoommtg: | zoommtg://zoom.us/join?confno=123456 | Joins a Zoom meeting |
zoomus: | zoomus://zoom.us/join?confno=123456 | Alternative Zoom scheme |
Media
| Scheme | Example | Description |
|---|---|---|
spotify: | spotify:track:4uLU6hMCjMI75M1A2tKUQC | Plays a track, album, or playlist in Spotify |
Location
| Scheme | Example | Description |
|---|---|---|
geo: | geo:37.7749,-122.4194 | Opens the maps application at given coordinates |
File System
| Scheme | Example | Description |
|---|---|---|
file: | file:///path/to/document | Opens a local file (⚠️ shows security warning) |
Other Schemes
Any URI scheme not listed above still works — 0io.io will generate a generic redirect page using the scheme name as the label. For example:
https://0io.io/magnet:?xt=urn:btih:...
https://0io.io/steam://run/730
https://0io.io/obsidian://open?vault=MyVaultDangerous Schemes
The following schemes are considered dangerous and will not auto-redirect. Users must explicitly click to proceed:
| Scheme | Risk |
|---|---|
javascript: | Can execute arbitrary code in the browser |
data: | Can render arbitrary content (phishing risk) |
vbscript: | Can execute arbitrary code (IE/legacy) |
These pages display prominent security warnings and require manual confirmation.