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What Is Mastros?
Mastros.online is a suite of browser-based data export tools built for Telegram Web, WhatsApp Web, LinkedIn and Sales Navigator. It helps users turn information already visible in their browser into structured files that are easier to review, organize, analyse and use in their own workflows.
The Telegram Exporter can collect group or channel members, chat messages, recent contacts, mutual groups and media. Users can export available names, usernames, IDs, timestamps, message content and related fields, or download photos, videos, documents and voice notes from conversations.
The WhatsApp Exporter works directly with WhatsApp Web and supports group members, current chat messages and recent contacts. It can capture available names, phone numbers, group roles, timestamps, message direction, conversation previews, unread status and other visible details.
The LinkedIn and Sales Navigator Exporter supports people, company, job and post searches, as well as Sales Navigator lead and account results. It structures visible data such as names, job titles, companies, locations, profile URLs, industries, company descriptions and other relevant search fields.
Exports are available in practical formats including CSV, JSON and JSONL, making the data easy to open in spreadsheets, import into CRMs, analyse with scripts or connect to other business tools. The suite can support research, lead preparation, recruiting, community management, reporting, archiving and workflow organisation.
Mastros.online runs as a Chrome extension built with Manifest V3, JavaScript, HTML and CSS. It uses client-side DOM parsing and browser APIs to process and export data from the user’s active web session. No external scraping APIs, separate phone logins or complicated technical setup are required.
Because the processing takes place locally in the browser, users retain greater control over their data and can work directly from the accounts they are already signed into. The suite is designed to replace repetitive copying and manual spreadsheet work with a simpler process: open the relevant page, select what to collect, review the available records and download a clean, structured export.
Product details are supplied by the publisher. Verify current features, availability, and pricing on the official Mastros website.
