If your customer outreach, event invites, or sales follow-ups live in a spreadsheet, you're one step away from sending personalized WhatsApp messages to all of them at once. Rocket Sender bridges the gap between Excel and WhatsApp Web — no APIs, no sign-up, and no repetitive manual work.

Step 1 — Install Rocket Sender

First, install the Rocket Sender Chrome extension. Head to the Chrome Web Store and click Add to Chrome. The install takes under a minute.

Once it's installed, open WhatsApp Web and scan your QR code as normal. The Rocket Sender panel will appear in the upper-right corner of the page, ready to use.

Rocket Sender extension on the Chrome Web Store
Find Rocket Sender on the Chrome Web Store and click Add to Chrome.
Rocket Sender panel visible inside WhatsApp Web
The Rocket Sender panel docks to the right side of WhatsApp Web automatically.

Step 2 — Prepare Your Spreadsheet

Open Excel (or Google Sheets) and set up your contact file. At a minimum you need a column for phone numbers. The real power comes when you add extra columns — Name, Company, City, or whatever custom fields you want to personalize each message with.

Make sure every number includes its international country code (e.g. +14155552671). A missing country code is the most common reason messages fail to send.

Sample spreadsheet with phone number, name, and company columns
A ready-to-import spreadsheet — phone number column plus any extra fields you need for personalization.

Step 3 — Export as CSV

Rocket Sender imports CSV files. In Excel, go to File → Save As and choose CSV (Comma delimited). In Google Sheets, use File → Download → Comma-separated values (.csv). Keep the file somewhere easy to find.

Saving the spreadsheet as a CSV file
Export your sheet as a .csv before uploading — this is the format Rocket Sender reads.

Step 4 — Import the CSV into Rocket Sender

Back in WhatsApp Web, click Upload CSV inside the Rocket Sender panel and select the file you just saved. Your contacts will load instantly — no waiting, no processing delays.

Clicking Upload CSV in the Rocket Sender panel
Tap Upload CSV in the Rocket Sender panel and select your file from your computer.

After uploading, Rocket Sender will ask you to identify which column contains your phone numbers. Select the right column and confirm.

Column mapping screen after importing the CSV
Map the phone number column so Rocket Sender knows where to read contact info from.

Step 5 — Write a Personalized Message

Type your message in the message box. To include a personalized value from your spreadsheet, click Insert Variable and pick the column — for example, Name. Rocket Sender inserts it as {{Name}} and swaps it for each contact's actual name before sending. Every recipient gets a message that reads like it was written just for them.

Variable placeholders inserted into the message template
Placeholders like {{Name}} are replaced with real values per recipient — no copy-paste required.

Step 6 — Hit Send

When your message looks right, click Send WhatsApp. Rocket Sender dispatches each message through your own connected WhatsApp account, with smart delays between sends to keep your account protected from being flagged. Watch the live delivery panel as messages go out in real time.

Sending the campaign from the Rocket Sender panel
Click Send and watch live delivery updates appear — green for delivered, red for any failures.
Don't have Excel? Google Sheets works identically. Just download your sheet as a CSV file and follow the exact same steps above.
Google Sheets download as CSV option
In Google Sheets: File → Download → Comma-separated values (.csv) to get a compatible file.

Video Walkthrough

Wrapping Up

Sending personalized WhatsApp messages from a spreadsheet once required expensive API integrations and a developer. With Rocket Sender, the entire flow — upload, personalize, send, track — runs in minutes directly inside WhatsApp Web. Your contacts each get a message that feels individual; you send them all at once.

Ready to run your first campaign? Install Rocket Sender for free and send in under 60 seconds.