🚀 I Built a WhatsApp Web Automation Chrome Extension (Manifest V3)

Source: Dev.to

Why I Built This

Most WhatsApp automation tools I found were either:

• Too aggressive (high risk of bans), or
• Closed‑source and ignored user privacy

I wanted to build something that is:

• Developer‑friendly
• Transparent
• Focused on safety and privacy
• Fully compatible with Chrome Manifest V3

What the Extension Can Do

• Send multiple messages automatically
• Random delays between messages to mimic human behavior
• Min/Max delay enforcement to avoid spam‑like actions

Scheduling

• Schedule message campaigns for a specific date and time
• Supports delayed start with Chrome alarms

Multiple Input Modes

• JSON mode – paste a raw array of messages
• Form Builder – add/remove messages via UI
• Profiles mode – load users with phone & messages
• API import (POST) – fetch campaigns from a backend
• Auto‑polling – periodically check for new configs

Full Control

• Start, Pause, Resume, Stop at any time
• Settings persist even after closing Chrome

Privacy‑First Features

Tools for public or shared environments:

• Blur chat messages
• Blur recent chat previews
• Blur images & videos
• Blur profile photos
• Blur message input area

Hover to reveal temporarily.

Tech Stack & Architecture

• Chrome Extension Manifest V3
• Pure JavaScript, HTML, CSS (no external libraries)
• Uses Chrome APIs: storage, alarms, scripting

Links

• Chrome Extension:
• Documentation / Source:
• Issues & Feedback:
• Privacy Policy:

Feedback Welcome

I’d love feedback from the community:

• Does the UX feel intuitive?
• What features would you add?
• Any concerns about Manifest V3 limitations?

Thanks for reading, and happy coding! 🚀