WhatsApp Bulk Marketing Sender Tool

I need a lightweight tool that lets me push out promotional text messages to large groups of WhatsApp contacts quickly and reliably. The core flow I’m after is simple: upload or paste a list of numbers, compose a message, hit send, and watch the campaign go.

Essential capabilities
• Send high-volume text blasts without having to save each number to my phone.
• Show live delivery status so I can see how many messages actually reached devices and how many failed.

Nice-to-haves for later (keep the codebase flexible)
• Room to bolt on multimedia sending or automatic follow-ups if my campaigns evolve.

Tech is your call—as long as it runs on a standard Windows machine or a small web server and avoids getting the WhatsApp account flagged by sticking to allowed rate limits. Deliver the compiled app or script, full source code, and a brief README so I can run it myself and tweak basic settings.