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Free while the launch beta runs

Mastros TikTok extension iconTikTok · Chrome extension

TikTok Engagement Rate Calculator & Scraper

The Mastros TikTok extension computes an exact engagement rate for any profile from TikTok's own counts — not the rounded numbers every other calculator multiplies — and exports creator profiles, creator searches, profile videos and video comments as CSV, JSON or JSONL.

Get it on the Chrome Web StoreSee pricing
Zero extra requestsIt only readsRuns in your browser

Free and unlimited while the launch beta runs · No account · It only reads

On screen

What you see on screen

Search TikTok, and every creator in the result comes back with the contact details written in their bio — business email, link-in-bio destination and engagement rate — then export the ones you ticked.

The Mastros panel over a TikTok creator search for “bakery studio”: four creator rows, each with the business email and website from the bio and an engagement rate, three ticked, and Export CSV and JSON buttons.
Emails and websites, straight from the bio
Two calculations side by side: a rate read off the rounded 3.1K on the page gives 5.87 percent, Mastros reads the exact 3,086 and gives 6.03 percent; a creator card shows 6.4 percent, above typical for the follower tier.
Exact, not estimated: 3,086 views, not “3.1K”
The four TikTok surfaces Mastros exports: creator search ranked by engagement rate, video comments, profiles and videos, and business emails parsed from bios as a column.
Four export surfaces
Three download scopes in the Mastros panel — every result of a search, a whole profile, or the single video open in the tab — above a row of downloaded video and image thumbnails.
Download videos and posts in bulk
Export CSV and Export JSON buttons for 12,480 rows, above three finished files: creators.csv, comments.csv and videos.json with their row counts and sizes.
Download the run as a spreadsheet
Unlimited rows during the beta across five export surfaces: engagement rate on every profile, creator search with a rate column, video comments and creator videos, business emails from bios, video and post downloads in bulk, CSV and JSON export.
Free. Unlimited. No signup.

How it works

How it works

Install, browse TikTok, save what you see. Nothing runs on its own.

01

Add the extension

One click from the Chrome Web Store. No sign-up wall.

02

Browse TikTok

Open a profile, a video or a search — rates appear as the page loads.

03

Pick what to save

Creators, videos or comments. Stop any time and keep what you have.

04

Save the file

CSV, JSON or JSONL — or a media ZIP with a metadata file.

The Mastros TikTok extension computing a creator's exact engagement rate from TikTok's real counts, then exporting the creator, their videos and the comments to a spreadsheet.

What you get

The engagement calculator up front, with email and website columns on every creator row, and creator, video, comment and media exports behind it.

Exact engagement rate

From TikTok's real numbers, not the rounded “1.2M” — with sample size and confidence.

Emails & websites from the bio

The business email and the link-in-bio destination as columns on every creator row — search results and profiles alike.

Creator profiles

Followers, likes, bio links and the emails creators publish in their bios.

Creator search

A whole results page ranked, with average views and engagement rate per creator.

Profile videos

Views, likes, comments, shares and saves for every video, one row each.

Video comments

Comments with replies, likes and timestamps — ready for analysis.

Media download

Videos and posts in bulk — every result of a search, a whole profile, or the one video open in your tab.

Zero extra requests

It reads the requests TikTok's own page already makes. It adds no traffic of its own.

Excel-ready files

CSV that opens cleanly in Excel in any language, plus JSON and JSONL.

It only reads

No posts, follows, likes or messages — and it never sees a password.

The creator and video exports carry an email column, filled from the address a creator wrote in their own bio. That has a page of its own: the Mastros TikTok email finder.

Why it's different

Exact, not estimated

“1.2M views” is a rounded label — TikTok's page actually carries the exact figure underneath. Competing calculators multiply the rounded number; Mastros reads the real one, so the rate you see is the rate you can put in front of a client. Pinned and promoted videos are excluded so the sample reflects normal performance.

And no fake surfaces: TikTok does not expose follower or liker lists, so Mastros doesn't pretend to export them. A run that stops at 80% hands you the 80%, clearly labelled, with resume.

Free, no sign-up

Work out a TikTok engagement rate right now

One creator at a time, in your browser. The extension does this for a whole creator search at once, from TikTok's exact counts.

Divide by

The account's total follower count

How many recent posts the totals below cover

Across those posts

Across those posts

Optional — leave at 0 to match the likes + comments standard

Across those posts

Enter the follower count, how many recent posts the totals cover, and the likes and comments across them. The rate appears here as you type — nothing is sent anywhere, and there is nothing to sign up for.

Open the full engagement rate calculator for the formulas and the benchmark table.

Pricing

Launch pricing

What Mastros for TikTok will cost when the beta ends. Until then, every tier below is free and has no limit.

Free and unlimited during the beta

Every surface unlocked, no account, no card. The prices below are what applies once the beta ends.

Free

Free in beta
$0/ month

Unlimited while the beta runs

250 records / month
  • No limit at all during the beta
  • Every surface unlocked
  • No account — one creator, video or comment = one record

Pro

Free in beta
$9$0/ month

Best if you export a lot

5,000 records / month
  • Every surface unlocked
  • Applies once the beta ends

Scale

Free in beta
$18$0/ month

For very big jobs

Unlimited records
  • No monthly record limit from us
  • Applies once the beta ends

One creator, video or comment is one record. Engagement rates shown on screen are free — they never count against the limit.

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

Frequently asked questions

Likes plus comments, divided by views, over a creator's recent posts. Mastros uses the last ~12 posts, leaves out pinned and promoted videos, and computes from TikTok's exact counts — always shown with the sample size and a confidence level.

It depends on the niche and the audience size, and typical ranges shift over time. That's why Mastros shows you the exact rate with its sample instead of a one-word verdict — and lets you compare creators side by side in a spreadsheet.

Yes. Open a video and save its comments with the commenter, text, likes, timestamp and replies — as CSV, JSON or JSONL.

No — and be careful with tools that claim to. TikTok does not expose follower or liker lists, so those tools stop after a handful of rows. Mastros only ships surfaces that actually work: profiles, creator search, videos and comments.

Mastros reads the requests TikTok's own page already makes as you browse and adds zero traffic of its own — so it adds no rate-limit exposure. It never posts, follows, likes or messages, never sees a password, and keeps every row on your computer.

Nothing while it is in beta — it is free and unlimited for everyone, with every surface unlocked and no account needed. When the beta ends: Free is 250 records a month, Pro is $9 for 5,000, and Scale is $18 with no record limit from us. One creator, video or comment is one record.

Add Mastros for TikTok to Chrome

Free and unlimited while the launch beta runs. No account, no card.

TikTok Extension

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