ZS Sender is a Chrome add-on designed for users who need to send bulk messages via WhatsApp Web. This tool allows the sending of messages to numbers, saved contacts, and groups, with features such as CSV import for recipient lists and the use of personalization variables like {name}. Users can enhance their messages with emojis and file attachments, making communication more engaging. Additionally, ZS Sender supports the scheduling of messages with random delays to maintain a natural conversation flow.

This add-on prioritizes user privacy and control, as all processing is conducted locally within the browser, ensuring no data is sent to external servers. Furthermore, users can track message delivery through a live report which can also be exported. ZS Sender is available in both English and Indonesian, making it accessible to a broader audience. Users are encouraged to utilize this tool responsibly by messaging only those who have consented to receive communications.