mastros

Save your data from
WhatsApp.

Chrome extensions that copy the people, chats, contacts and files you can already see into one clean file. Open it in Excel or Google Sheets.

Pick your platform

WhatsAppView toolTelegramView toolLinkedInView toolInstagramNewFreeView toolTikTokNewFreeView tool

CSV · XLSX · JSON · JSONL · ZIP · Stays on your computer · You press the button

WhatsApp224users5.0(47 reviews)Telegram649users4.9(71 reviews)LinkedIn126users5.0(34 reviews)Instagram14usersNo reviews yetTikTokNow liveSee the extension →

Extensions

One way of working. Five apps.

Chrome extensions that turn what you can already see into one clean file. All five are live — Instagram and TikTok add the bio email, website and engagement rate to every account, and download media in bulk.

Mastros WhatsApp extension icon

WhatsApp

CSV · JSON · JSONL

Save contacts, group members, chat messages and media from WhatsApp Web into one clean file.

  • Group Members Scraper
  • All messages of current chat
  • All Recent Contacts
  • Media Download
Add the extensionView tool
Mastros Telegram extension icon

Telegram

CSV · JSON · JSONL · ZIP

Save members, messages, contacts, shared groups and files from Telegram Web.

  • Recent contacts
  • Chat messages
  • All group members
  • Mutual groups
Add the extensionView tool
Mastros LinkedIn extension icon

LinkedIn

CSV · JSON · JSONL

Save your LinkedIn and Sales Navigator searches as a clean file. It only reads, and it stays on your computer.

  • Profile Search
  • Company Search
  • Jobs Search
  • Posts Search
Add the extensionView tool
Mastros Instagram extension icon

InstagramNewFree

CSV · XLSX · JSON

Followers, comments, posts and stories as one clean file — with the bio email, website and engagement rate on every account — plus bulk media download.

  • Emails & websites from the bio
  • Followers & following
  • Engagement rate per account
  • Media download
Add the extensionView tool
Mastros TikTok extension icon

TikTokNewFree

CSV · JSON · JSONL · ZIP

Exact engagement rates, plus the bio email and website on every creator — with creator, video and comment exports and bulk video download.

  • Exact engagement rate
  • Emails & websites from the bio
  • Creator search
  • Media download
Add the extensionView tool

What you can do

Jobs done with an extension you already have

These are not separate installs. Each one is a capability of one of the five extensions above, with a page explaining it.

Instagram Email FinderThe emails creators publish in their own bio, in their own column.Sales Navigator ExportLead and account searches to Excel, with no per-lead credit.Telegram Video DownloaderEvery video, photo and file in a chat or channel, as one archive.WhatsApp Media DownloaderA chat's photos, videos and voice notes in bulk from WhatsApp Web.WhatsApp Chat BackupAny conversation as a searchable CSV, JSON or JSONL file.TikTok Email FinderCreator bio emails, alongside the exact engagement rate.

One panel per app

Pick the tool you use

Real screens from the extension — the same buttons, the same progress and the same file you get.

WhatsApp Web Mode

Three simple tools. You get all three on the free plan.

  • Group Members Scraper
  • All messages of current chat
  • All Recent Contacts
  • Media Download
See the WhatsApp tool →

Telegram Web

Five ways to save, all of them working the moment you install — nothing to connect.

  • Recent contacts
  • Chat messages
  • All group members
  • Mutual groups
See the Telegram tool →

LinkedIn + Sales Navigator

Six searches. The panel spots the page you are on, shows you the fields it found, and saves them as one clean file.

  • Profile Search
  • Company Search
  • Jobs Search
  • Posts Search
See the LinkedIn tool →

Instagram

Followers, following, comments, posts and stories — every account with its bio email, website and engagement rate — plus bulk media download in original quality. Live on the Chrome Web Store; the launch beta is free and unlimited.

  • Emails & websites from the bio
  • Followers & following
  • Engagement rate per account
  • Media download
See the Instagram tool →

TikTok

Exact engagement rates, the business email and website from every creator's bio, creator, video and comment exports — and video and post download in bulk. Live on the Chrome Web Store; the launch beta is free and unlimited.

  • Exact engagement rate
  • Emails & websites from the bio
  • Creator search
  • Media download
See the TikTok tool →

How it works

How it works

Install the extension, open the web client, choose a mode, monitor the run and export.

01

Add the extension

One click from the Chrome Web Store. It works in any Chrome-like browser.

02

Open WhatsApp, Telegram, LinkedIn, Instagram or TikTok

The Mastros panel shows up on the side of the page by itself.

03

Pick what to save

Group members, messages, contacts, files, a LinkedIn search — or followers and creators with their bio email, website and engagement rate.

04

Watch it work

See how far along it is, and check the fields before you save.

05

Save the file

Get a clean CSV, JSON or JSONL file — or a ZIP of files on Telegram.

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
I needed to pull our massive community member list into a spreadsheet for our new CRM, and this tool perfectly extracted hundreds of contacts with zero setup or messy API keys.
Niamat UllahMastros for WhatsApp
This extension helps you extract Telegram messages conveniently, as well as members and chats. It also has a clean and user-friendly interface.Thanks to the developer for creating such a useful extension
abdelaleem mohamedMastros for Telegram
This is a tool best for WhatsApp Data export; it only works with the information already visible in your WhatsApp web browser. You can be able to download data instantly in Excel and JSON formats in a massive timesaver.
Ondiek VictorMastros for WhatsApp

Pricing

Same prices for every tool.

Every tool has a free plan. Pro is $9 and Scale is $18 on all of them — only the limits change. Instagram and TikTok are free on every tier while they are in beta.

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

Free plans: WhatsApp 100 profiles + 100 messages a month · Telegram 250 + 300 · LinkedIn 250 records. WhatsApp and Telegram Scale has big limits, but it is not unlimited. LinkedIn Scale has no record limit from us, and LinkedIn's own safe limits still apply. Instagram and TikTok are in a free, unlimited beta — after it, Pro is 5,000 records and Scale has no record limit from us.

Stays on your computer

Your data stays yours

Made for honest work: research, group admin and keeping records — in chats you are already part of.

It runs in your browser

The work happens on your computer. Your data never goes to Mastros servers.

You press the button

Nothing runs on its own. You pick the tool and you start every save.

Only what you can see

It reads what is already in front of you. No hidden numbers, and no deleted messages.

No names in our stats

We count how often the tools are used. We never see messages, phone numbers, names or chat titles.

Questions about Mastros

Yes, and here is what safe means specifically. Everything runs inside your own browser — the data you export never reaches a Mastros server. There is no account, no API key and no password to hand over; the extension works through the session you are already signed into. It only reads what the page has already loaded, it never sends or posts anything, and nothing runs on its own — you press the button every time. The Mastros Chrome Web Store listings are verified as created by the owner of this website.Is it safe to use Chrome extensions in 2026? →

Mastros does not do the things that get accounts actioned. It sends no messages, follows no one, joins no groups and makes no requests of its own — it reads the responses your browser has already loaded. On LinkedIn there is an additional hourly safety cap, separate from your plan limit, specifically so a large export does not look like rapid-fire activity. That said, you are responsible for how much you export and for following each platform's terms, and each platform's own limits still apply regardless of what Mastros does.Avoiding WhatsApp bans when exporting →How in-browser exporters cut LinkedIn detection risk →

Reading data that is already visible to you, on an account you are logged into, for your own records is a different question from collecting and redistributing other people's personal data. Mastros only does the first. What you do with the file afterwards is governed by the platform's terms and by privacy law where you are — GDPR in the EU, and equivalents elsewhere. Mastros is not a law firm and this is not legal advice.Is Telegram scraping legal? →LinkedIn's scraping policy →GDPR-compliant chat data export →

None of your content. Messages, phone numbers, names, chat titles and group titles never leave your browser. Mastros records how often the tools are used, and those counts contain no personal data. Account and billing information is the only thing that touches a Mastros server.What local data processing means →Client-side scraping, explained →

Chrome asks for site access on the platform the extension works with — that is what lets the panel appear and read the page you have open. It does not request access to your other tabs, your browsing history or your other accounts. The permission looks broad because Chrome's wording is broad; the actual scope is one site.

No. No API ID, no API hash, no verification code, and no Mastros account. Install the extension, open the web client you already use, and it works through that session.Why browser exports need no Telegram API hash →

No. Every extension has a free tier you can use without paying, without an account and without entering a card — you install it from the Chrome Web Store and it works. The extensions still in beta are free outright while the beta runs. A card only comes into it if you decide to move to Pro or Scale for the bigger monthly limits, and how much the free tier gives you differs by extension, so the numbers are on each extension's own page.

No. Nothing is sent, nothing is posted, and no notification is generated. The export happens on your computer and stays there.

Chrome and any Chromium browser — Edge, Brave, Arc, Opera and Vivaldi. It does not work in Safari or Firefox, and it does not work in the phone or desktop apps; it needs the web client.

Save your data today

Free to start, and no sign-up. Add the extension for the app you use.

WhatsApp Extension Telegram Extension LinkedIn Extension Instagram Extension TikTok Extension