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Key Features
Instant Calculation
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Mobile Friendly
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100% Free
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An "sms:" link opens the visitor's default messaging app with a phone number (and optionally a message) already filled in — a quick way to offer a "text us" option without an app or API integration. This tool builds that link using the standard sms: URI scheme.
How it works
Enter a phone number and, optionally, a message to pre-fill. The tool builds a link in the form sms:{phone}?body={message}, URL-encoding the message text.
- Enter phone number.
- Enter pre-filled message (optional).
- Click Calculate to see your results.
Examples
A "text us" support link
A business phone number with a pre-filled message like "Hi, I'd like to ask about..." saves the customer from typing an opening line themselves.
Who should use it
- Adding a "Text us" button to a website or email signature.
- Sharing a quick-contact link on social media or a QR code.
Industry applications
- Customer support and appointment reminders
- Small business and service-provider contact links
Advantages
- No app install or API integration needed — it's just a link.
- Works with the phone's native messaging app, not a third-party service.
Limitations
- Minor platform inconsistency between iOS and Android in how the pre-filled message is separated from the number.
Common mistakes to avoid
- Assuming this link sends a text automatically — it only opens the messaging app with the draft pre-filled; the visitor still has to hit send.
- Not testing on both iOS and Android before relying on it for an important use case, given the platform quirk mentioned above.
Best practices
- Test the generated link on both a phone and, if possible, both iOS and Android before publishing it widely.
- Keep the pre-filled message short, since the visitor can always edit it before sending.
Tips
- If precise cross-platform behavior matters for your use case, test the link on both a real iPhone and a real Android device rather than assuming.