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Mastros WhatsApp extension iconWhatsApp · Chrome extension

WhatsApp Chat Exporter and Group Member Export

Turn the WhatsApp Web chats, contacts and groups you can see into one clean file. Save contacts, group members, recent chats and loaded messages as CSV, JSON or JSONL. All the work happens in your browser.

Get it on the Chrome Web StoreSee pricing

WhatsApp Web only · No API · Nothing automated · No sign-up

How it works

How to save WhatsApp Web data

Add it, open WhatsApp Web, pick a tool, and save the file.

01

Add the extension

Get Mastros — WhatsApp Scraper from the Chrome Web Store. It works in any Chrome-like browser.

02

Open WhatsApp Web

Go to web.whatsapp.com and log in. The Mastros panel shows up on the side.

03

Pick what to save

Choose Group Members, Chat Messages or Recent Contacts.

04

Save your file

Get a CSV, JSON or JSONL file. Open it in Excel, Google Sheets or your own tools.

Web Mode only

Four tools

Each one reads only what WhatsApp Web has already put on the page.

Group Members Scraper

Web Mode

Saves everyone you can see in the group you have open.

  • Names, phone numbers (when shown) and roles
  • Reads the member list on the page
  • Counts toward your monthly profile limit
  • Open a group before you start

Chat Messages

Web Mode

Saves the messages loaded in the open chat, plus the contact card.

  • Message text, who wrote it and when
  • Includes the chat's contact card
  • Reads only messages already loaded in the chat
  • Cannot bring back deleted messages

All Recent Contacts

Web Mode

Saves the names, last messages and numbers from your chat list.

  • Name, last message, time and unread count
  • Reads the chat list on the left
  • Nothing has to be open
  • Counts toward your monthly profile limit

Media Download

Web Mode

Downloads the photos, videos and voice notes from the chat or group you have open.

  • Bulk download, not one file at a time
  • Photos, videos, voice notes and audio
  • Saved straight to your computer
  • Open the chat before you start

What you get

It works on your computer, and it never does anything on its own.

It runs in your browser

The work happens on your computer. Nothing goes to Mastros servers.

CSV, JSON and JSONL

Pick the file type you want. CSV opens in Excel and Google Sheets.

It never sends anything

No messages, no auto-replies, no group joining, no invites. It only reads what is already on screen.

Every run is saved

Each run is kept on its own, so you can come back and save the file again.

You keep what it found

If you stop a run, or you reach your monthly limit, the rows it already found stay.

Numbers stay private

You see a phone number only if WhatsApp Web shows it. Hidden numbers stay hidden.

Pricing

Same paid plans. Different free limits.

Pro and Scale are the same for WhatsApp and Telegram. Only the free plan is different. Pick a tool to see its free limits.

Free

$0/ month

Start with every tool

100 profiles / month
100 messages / month
  • Every scraper unlocked
  • No account needed

Pro

Most popular
$9/ month

Best if you export a lot

5,000 profiles / month
10,000 messages / month
  • Same tools as Free, bigger limits
  • Every tool unlocked

Scale

$18/ month

For very big jobs

100,000 profiles / month
500,000 messages / month
  • Same tools as Free, the biggest limits
  • Made for big, repeated exports

Telegram Free: 250 profiles + 300 messages a month · WhatsApp Free: 100 + 100. Pro is $9 for 5,000 profiles + 10,000 messages. Scale is $18 for 100,000 + 500,000. Scale has limits too — it is not unlimited.

Reviews

What people say

4.9 out of 5 from 152 reviews on the Chrome Web Store.

This tool is super easy to use and exports LinkedIn profiles to Excel in just a few clicks, with clean, organised data.
Ondiek VictorMastros for LinkedIn
Works really well and saves me a lot of time when downloading Telegram videos and media. Simple, useful, and easy to use.
g ethanMastros for Telegram
Super handy extension for pulling contact lists and chat logs straight into an excel sheet without doing annoying manual copy pasting all day...
Asifur RahmanMastros for WhatsApp

Private from the start

Mastros — WhatsApp Scraper never sends your messages, contacts, phone numbers, chat names or group names to Mastros servers. The work happens in your browser.

We count how often the tool is used. Those counts never hold message text, phone numbers, names, chat titles, group titles or any WhatsApp content.

Frequently asked questions

It is a Chrome extension that saves contacts, group members, messages and media from WhatsApp Web chats you can already see. It adds a panel to web.whatsapp.com with four tools, and it saves your data as CSV, JSON or JSONL.

Mastros does not do the things that get WhatsApp accounts banned. It sends no messages, joins no groups, adds nobody, and makes no requests of its own — it reads what WhatsApp Web has already rendered in your own session. There is no API client and nothing runs in the background. What remains is your side of it: WhatsApp's Terms of Service govern how you use the file, and bulk messaging people who did not ask to hear from you is what actually gets accounts banned, whatever tool produced the list.Avoiding WhatsApp bans when exporting →

You can, and Mastros would rather say plainly where the line is than leave it implied. Exporting a group you run so you can keep records, or so you can reach members who expect to hear from you, is what this is for. Buying nothing, guessing nothing and messaging strangers in bulk because their number appeared in a group is what gets accounts banned and what anti-spam law is about — CAN-SPAM in the United States, GDPR in the EU, and equivalents elsewhere. Mastros builds the file; the sending is yours, and so is the responsibility for it.

Open the group in WhatsApp Web. Pick the Group Members tool in the Mastros panel and press save. You get names, roles and phone numbers where WhatsApp Web shows them. Choose CSV and the file opens right in Excel and Google Sheets. JSON and JSONL work too. For your chat list, use the Recent Contacts tool.

No. WhatsApp tells no one when you save a chat. The tool only reads what you can already see in your own WhatsApp Web, and it keeps the file on your computer. It sends nothing and does nothing others can see.

The Chat Messages tool saves the messages that are loaded in the open chat. WhatsApp Web loads older messages as you scroll, so scroll up until you can see the ones you want. Then save them as CSV, JSON or JSONL. It reads only what is on the page, and it cannot bring back deleted messages.

Yes. The Media Download tool saves the photos, videos and voice notes from the chat or group you have open, in bulk, straight to your computer. It saves only media your own WhatsApp Web can show you — it cannot recover deleted or view-once files.

No. It works on WhatsApp Web (web.whatsapp.com) in Chrome or a Chrome-like browser. It does not work in the phone app or the desktop app.

No. It does not connect to WhatsApp's API and it does not link to your account. It never sends, schedules, auto-replies or forwards to a list. It reads what WhatsApp Web has already put on the page.

No. You see a phone number only if WhatsApp Web shows it. Hidden numbers stay hidden. There is no way for it to pull full history or bring back deleted messages.

No. Everything it finds stays in your browser until you save the file. We only talk to our server for your account and billing, and for counts that hold no personal data. Your WhatsApp data never goes to Mastros servers.

CSV, which opens in Excel and Google Sheets. JSON, which is one tidy list. JSONL, which is one record per line and is handy for other tools.

Free gives you 100 profiles and 100 messages a month, with every tool unlocked and no account needed. Pro is $9 a month for 5,000 profiles and 10,000 messages. Scale is $18 a month for 100,000 profiles and 500,000 messages.

No. Mastros is not part of WhatsApp or Meta, and they do not back us or work with us. You are responsible for following WhatsApp's Terms of Service.

Write to admin@mastros.online with the WhatsApp extension named in the subject, or use the Support page on this website.

Please use it fairly

It is made for honest work: research, notes and running a group. Save only chats you are allowed to see. Follow WhatsApp's Terms of Service and your privacy laws. Never use the file for spam, mass messages or to bother people. admin@mastros.online

Backing up a conversation? See WhatsApp chat backup. After the photos and videos? See the WhatsApp media downloader. We make one for other apps too: Telegram scraper · LinkedIn & Sales Navigator scraper