Chrome //
Extensions 
Chrome
Web store
select chrome_id_no,plugin_tag_line,plugin_name,plugin_icon,sitemap_url,oldvsnew_comment from final_chrome_totaldata_sept2022 where MATCH(plugin_name) AGAINST('+com +checker' IN Boolean MODE) order by users desc
Grammarly: Grammar Checker and Writing App
Improve your writing with Grammarly's communication assistance—including spell check, grammar check, punctuation check, and more.
Google Mail Checker
Displays the number of unread messages in your Google Mail inbox. You can also click the button to open your inbox.
Microsoft Editor: Spelling & Grammar Checker
Write with confidence with Microsoft Editor, your intelligent grammar, spelling, and style checking writing assistant.
Checker Plus for Gmail™
Get notifications, read, listen to or delete emails without opening Gmail and easily manage multiple accounts.
Grammar & Spell Checker — LanguageTool
Check your texts for spelling and grammar problems everywhere on the web
Grammar and Spelling checker by Ginger
Improve your English communication with Ginger's #1 spelling and grammar checker!
Checker Plus for Google Calendar™
See your next events, get meeting notifications and snooze events without opening the Google Calendar page!
CSGOFloat Market Checker
Dedicated API for fetching the float value, paint seed, and screenshots of CS:GO items on the Steam Market or Inventories
ProWritingAid Grammar Checker & Writing Coach
The best writing style and grammar checker for everything you send, share, tweet or publish.
Dr.Web Link Checker
Dr.Web antivirus extension for link scanning from the context menu. Protects against malware and phishing attacks on social media.
Spell Checker for Chrome
Spell Checker extension for Chrome. It's easy to use and fast. This extension supports 12 languages for spell check.
Website SEO Checker: Free Audit & Analysis
Get free on-page SEO report with the best website SEO checker. Use SEO analysis to do audit for the most valuable pages at first.
Ban Checker for Steam
Automatically check bans of people you recently played with, your friends, and group members.
Datalayer Checker
The easiest way to debug and check the dataLayer implementations without having to use the browser console!
CrowdTangle Link Checker
An easy way to see how often a link has been shared, who shared it and what they said!
HTML Error Checker
Check the HTML for error. This doesn't send the source to the external. If web page behavior is not correct, you should turn off it.
Outwrite — Grammar checker & rewrite tool
Write perfect content with Outwrite. Check spelling & grammar, improve writing style, find synonyms and paraphrase sentences.
Broken Link Checker
The Easiest Way to find all broken links (404 errors) on the web page. Find more! Save more!
Bookmark Checker
Bookmarks Checker. Scan favorites for broken or dead links. Delete empty, and duplicate folders.
Content Checker Reality
Content Checker is an google chrome extension that allows you to check content of any site you visit for well known content types
Pre-sending Checker for Gmail
Allows to pop up all lists easy to check whether or not any wrong addresses in TO/CC/BCC in your Gmail.
Siteimprove Accessibility Checker
Jumpstart Your Web Accessibility Efforts Directly in Google Chrome
Grammar Checker and Rewrite Tool — Linguix
Improve your writing and create compelling content with Linguix grammar checker & rewriter.
Sapling Grammar Checker and Writing Assistant
Improve your writing with a spell + grammar checker and writing suggestions.
Office365 Mail Checker
Displays the number of unread messages in your Office365 Mail inbox. You can also click the button to open your inbox.
Checker Plus for Google Drive™
Quickly browse your Google Drive files without opening a webpage and get notifications of modifications to your shared documents
Steam Market Float Checker
Check the float/wear values of CS:GO skins in inventories, trade windows and on the Steam Community Market.
Serpstat Website SEO Checker
Instantly check your website's SEO, analyze competitors and get advantage of powerful search analytics in one place.
Inbox by Gmail Checker
Displays the number of unread messages in your Inbox by Gmail. You can also click the button to open your inbox.
Spell checker and Grammar checker by Scribens
A powerful, free spelling and grammar checker. Scribens corrects 250 types of grammar mistakes. English and French.
DNS Checker - SEO and Domain Analysis
SEO and Domain Analysis Tool by DNS Checker. Provides SEO Report, Meta Redirects and 404s, Client IP, Domain IP & Geo Location, etc
自動価格比較／ショッピング検索（Auto Price Checker）
ショッピング中に自動的に他のショッピングサイトを検索し、安い価格順に10件表示します。検索対象の8万店以上。自動比較の対象はAmazonや楽天Booksなどショップサイトだけでなく価格.comなど価格比較サイトでも可能。テキストを選択して右クリックでの価格比較も。
Colour Contrast Checker
Check the contrast between different colour combinations against WCAG standards
Website Technology Checker by Snov.io
Identify site technologies with Snov.io Website Technology Checker.
Multicheck Checkbox Checker
Simply check or uncheck multiple checkboxes at a time by clicking and dragging.
I.UA Mail Checker
Displays the number of unread messages in your I.UA Mailbox. You can also click the button to open your mailbox.