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Check Readability

checkreadability.com

Free plan WebBrowser extension
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Spec score 8.6 #2 of 25 in Readability Checkers

What it is

Check Readability analyzes pasted text and returns nine readability scores alongside a consensus grade level. The formulas include Automated Readability Index, Flesch Reading Ease, Gunning Fog, Flesch-Kincaid Grade Level, Coleman-Liau, SMOG, LINSEAR Write, FORCAST and New Dale-Chall. The web analyzer gives feedback on complexity, sentence length and word choice. A Chrome extension adds a native Side Panel, full-page or selected-text extraction and interactive formula breakdowns; scoring happens locally without transmitting page content or selected text. Text submitted to the website is sent over an encrypted connection and kept in memory only while scores are calculated. The site says analyzed text is not logged or stored, while Google Analytics is used for page visits and browser-related information. Check Readability is free, requires no account and permits personal and commercial use. The product says readable content can support accessibility and search rankings. Its scores are statistical estimates and cannot determine whether writing is accurate, logical, appropriate or well argued. The extension supports System, Light and Dark interface modes.

Spec sheet

What it does
The service analyzes pasted text and returns nine readability scores plus a consensus grade level.Read 15 Oct 2026 · checkreadability.com
Purpose
CheckReadability analyzes pasted text and returns nine readability scores plus a consensus grade level.Read 30 Sep 2026 · checkreadability.com
Integrations
The reviewed maker pages document the website analyzer and Chrome extension but do not identify third-party integrations.Read 15 Oct 2026 · checkreadability.com
Support
Privacy questions can be sent to [email protected].Read 30 Sep 2026 · checkreadability.com
License
The reviewed pages do not state an open-source license or publish source code.Read 15 Oct 2026 · checkreadability.com
Accessibility
The product says readable content can improve accessibility for people with reading difficulties.Read 30 Sep 2026 · checkreadability.com
Account requirement
The service does not require account creation.Read 15 Oct 2026 · checkreadability.com
Accuracy limitation
The terms warn that statistical formulas cannot judge accuracy, logic, appropriateness or quality of argument.Read 15 Oct 2026 · checkreadability.com
Actionable feedback
The site says its results explain what makes text difficult and how to improve it.Read 15 Oct 2026 · checkreadability.com
Analysis
The site provides immediate feedback on text complexity, sentence length, and word choice.Read 30 Sep 2026 · checkreadability.com
Analytics
The website uses Google Analytics for page visits, rough geographic region, browser type, and referring site, but not analyzed text.Read 30 Sep 2026 · checkreadability.com
API and SDKs
The reviewed maker pages describe no public API, SDK or developer integration package.Read 15 Oct 2026 · checkreadability.com
Availability limitation
The terms provide the service as-is and as-available without guaranteeing uninterrupted access.Read 15 Oct 2026 · checkreadability.com
Chrome extension
The browser extension analyzes selected text or complete webpages through Chrome's native Side Panel.Read 15 Oct 2026 · chromewebstore.google.com
Chrome listing
The Chrome Web Store listing describes the extension as free and reports version 1.2.0 updated September 4, 2026.Read 30 Sep 2026 · chromewebstore.google.com
Coleman-Liau
The Coleman-Liau metric estimates readability from character counts rather than syllable counts.Read 15 Oct 2026 · checkreadability.com
Commercial use
The terms allow personal and commercial use, including checking work written for clients or employers.Read 15 Oct 2026 · checkreadability.com
Developer identity
The Chrome listing gives the developer email [email protected] and marks the developer as a non-trader.Read 15 Oct 2026 · chromewebstore.google.com
Extension extraction
The extension can extract full webpage body text or analyze a selected block with one click.Read 15 Oct 2026 · chromewebstore.google.com
Extension features
The extension provides a native Chrome Side Panel, full-page or selected-text extraction, interactive formula breakdowns, and nine readability formulas.Read 30 Sep 2026 · checkreadability.com
Extension news
A maker article dated September 2, 2026 announced the Chrome extension as a new native Side Panel tool.Read 15 Oct 2026 · checkreadability.com
Extension package
The Chrome listing reports a size of 54.35 KiB and English as its language.Read 15 Oct 2026 · chromewebstore.google.com
Extension privacy
The Chrome listing says scoring runs locally, with zero tracking and no data collected.Read 15 Oct 2026 · chromewebstore.google.com
Extension rating
Rating on Chrome Web Store: 0 out of 5 from 0 ratingsRead 15 Oct 2026 · chromewebstore.google.com
Extension update
The Chrome listing says the extension was updated on September 4, 2026.Read 15 Oct 2026 · chromewebstore.google.com
Extension users
The Chrome Web Store listing shows 4 users.Read 15 Oct 2026 · chromewebstore.google.com
Extension version
The listed extension version is 1.2.0.Read 15 Oct 2026 · chromewebstore.google.com
Flesch Reading Ease
Its Flesch Reading Ease metric uses a 0–100 scale, with higher scores representing easier text.Read 15 Oct 2026 · checkreadability.com
Flesch-Kincaid
The Flesch-Kincaid metric converts Flesch Reading Ease results into a U.S. grade level.Read 15 Oct 2026 · checkreadability.com
FORCAST
FORCAST estimates grade level using single-syllable words.Read 15 Oct 2026 · checkreadability.com
Formula coverage
The checker includes Automated Readability Index, Flesch Reading Ease, Gunning Fog, Flesch-Kincaid, Coleman-Liau, SMOG, Linsear Write, FORCAST and New Dale-Chall.Read 15 Oct 2026 · checkreadability.com
Formulas
The analyzer supports Automated Readability Index, Flesch Reading Ease, Gunning Fog, Flesch-Kincaid Grade Level, Coleman-Liau, SMOG, LINSEAR Write, FORCAST, and New Dale-Chall.Read 30 Sep 2026 · checkreadability.com
Gunning Fog
The Gunning Fog metric estimates the formal-education years needed to understand text.Read 15 Oct 2026 · checkreadability.com
Hosting
The privacy policy identifies Vercel as the host and says standard server logs such as IP address and request time are recorded for security and reliability.Read 15 Oct 2026 · checkreadability.com
Instant analysis
The maker says scores and feedback on complexity, sentence length and word choice appear immediately.Read 15 Oct 2026 · checkreadability.com
Linsear Write
Linsear Write is presented as a measure aimed at technical writing.Read 15 Oct 2026 · checkreadability.com
New Dale-Chall
New Dale-Chall uses a familiar-word list to estimate text difficulty.Read 15 Oct 2026 · checkreadability.com
Privacy analytics
The website uses Google Analytics for page-level usage information such as visited pages, approximate region, browser and referrer.Read 15 Oct 2026 · checkreadability.com
Privacy on website
Website text is sent over an encrypted connection, processed in memory, and not written to a database, logged or used for training.Read 15 Oct 2026 · checkreadability.com
Score limits
The terms say readability formulas are statistical estimates and cannot judge whether writing is accurate, logical, appropriate, or well argued.Read 30 Sep 2026 · checkreadability.com
Self-hosting
The reviewed maker pages provide no self-hosting package or deployment instructions.Read 15 Oct 2026 · checkreadability.com
SEO
The product says it helps improve search rankings by making content easier to read and understand.Read 30 Sep 2026 · checkreadability.com
SEO positioning
The product is marketed for improving search performance by making content easier for readers and search engines.Read 15 Oct 2026 · checkreadability.com
SMOG
The SMOG metric estimates education years needed to understand writing.Read 15 Oct 2026 · checkreadability.com
Support contact
Privacy and terms questions are directed to [email protected].Read 15 Oct 2026 · checkreadability.com
Text editor
The website provides an editable area where users paste or type text before running analysis.Read 15 Oct 2026 · checkreadability.com
Themes
The Chrome extension supports System, Light, and Dark interface modes.Read 30 Sep 2026 · chromewebstore.google.com
Web privacy
Text analyzed on the website is sent over an encrypted connection, held in memory only while scores are computed, and not written to a database, logged, or used for training.Read 30 Sep 2026 · checkreadability.com

Plans and prices

Free Free 9 readability formulas · no account · no usage fees · personal and commercial use · website text held only during scoring Read 15 Oct 2026 · checkreadability.com

Every Check Readability plan and price →

Strong points and limits

Strong points

  • Returns nine scores and a consensus grade level.
  • Chrome extension analyzes selected text or full pages.
  • Extension scoring stays local in the browser.
  • Free, with no account or usage fees.
  • Personal and commercial use permitted.

Limits

  • Scores cannot judge accuracy, logic or appropriateness.
  • Website analysis is processed in memory while scores are computed.
  • Website uses Google Analytics for visit and browser information.

Who it suits

Check Readability suits writers, editors, researchers and educators who want formula-based scores for text. The extension is also presented for copywriters and SEO specialists seeking local browser analysis.

Verdict

Check Readability provides a broad set of readability estimates in a free web analyzer and Chrome extension. Treat the scores as measures of text complexity, not judgments of argument quality or accuracy.

Where Specifiction places it

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