Is there any software or web page that can send short messages to mobile phones?

Taking Beidou SMS as an example, the steps of sending SMS to mobile phone with web pages or software are as follows:

Register and log in to the web version, PC or APP Beidou SMS platform;

Then import the number to be sent, as shown in the figure;

Edit the short message content and detect sensitive words whose keywords are modified;

Finally, click Send.