SEO Content Checker: Plagiarism & Readability icon

SEO Content Checker: Plagiarism & Readability

by Boosta Inc OÜ · copywritely.com · Developer Tools
FeaturedEstablished publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Easy-to-use SEO content checker, that helps to check text for plagiarism, readability, relevance, keyword stuffing.

Users
9,000
0 in 30 days
Rating
3.4 / 5
unchanged in 30 days
Ratings
11
0 in 30 days
Store rank
#11K
#9,131 among extensions
Version
1.5.5.1
updated 23 Feb 2024

Users

monthly, 3 years
2,0006,00010KAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 9,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
3711Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 11 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About SEO Content Checker: Plagiarism & Readability

Easy-to-use SEO content checker, that helps to check text for plagiarism, readability, relevance, keyword stuffing. 1. Find duplicate content and plagiarism sources. Click on any source to highlight parts of the text which are duplicate. Immediately rewrite these parts if you need it. 2. Identify redundant phrases. Redundant phrases are useless filters that do not add any value to the text. Click on the collected phrases on the right to highlight them and rewrite or delete this words. 3. Detect keyword stuffing. Find the words that make your text spammy and stop words. Get suggestions how many times it is better to use each word in the text to avoid spam. 4. Check for what phrases your text is relevant. Relevant words are phrases by which your text can rank in SERP with high probability. Note that it is a forecast. There are a lot of ranking factors, except content factors. 5. Check how easy it is to read your content. Сontent readability can influence on bounce rate of the page, its conversion rate and finally position in SERP. Detect and fix problems with readability to help users find solutions they need faster and easier. 6. Find how to structure your sentences in a better way. It's better to alternate long and short sentences to make the content easy-to-read. Detect parts in the text without such rotation and fix it. 7. Check text for keywords. Most likely, you create a text that should be ranked by specific keywords. And it's important to check how good your content is optimized for such purpose. Paste or enter a list of keywords in the right table and you will get a report that will help to proof it.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%00.00
1 year−1,000−10.0%00.00

Version history

3 versions recorded
1.5.5.123 Feb 2024
1.5.529 Oct 2021
1.5.420 Jun 2019

Details

Category
Developer Tools
First seen
20 Jun 2019
Size
14 KB
Languages
de, en, nl, es, fr, it, no, pt-BR
Pricing
Free
Privacy policy
sitechecker.pro
Support
copywritely.zendesk.com
Extension ID
jhngfghbfdjfdfejdjlgpmaeeegckldm

Permissions and risk

Minimal riskimpact 0, likelihood 0
Permissions
activeTab

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