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Text Inspector

textinspector.com

From £9.96/mo Free plan WebAPI
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Spec score 8.4 #3 of 26 in AI Readability Checkers

What it is

Text Inspector analyses English text for difficulty, readability, lexical diversity, and CEFR levels. Its overall difficulty score draws on more than 200 metrics, while the CEFR Level Checker gives individual words a level along with their commonness and difficulty. Listed tools include Statistics and Readability, Lexical Diversity, Scorecard, Tagger, EVP, BNC, COCA, Academic Word List and Phrases, Knowledge-Based Vocabulary Lists, and Metadiscourse Markers. An API lets people and organisations add analysis and scoring to their own products. The maker describes it as useful to language professionals, academics, and students preparing teaching materials or tests and evaluating student work. English is fully supported; other languages may receive limited statistics or lexical-diversity information. The Free plan covers 250 words and automatically deletes analysis data after six hours. The Organisation plan allows up to 13,000 words, the largest stated limit. A 30-day trial is listed for API access, which starts from £360 per year.

Spec sheet

What it does
Text Inspector analyzes English text difficulty and vocabulary using more than 200 metrics, with separate writing, reading and listening modes.Read 14 Oct 2026 · textinspector.com
Purpose
Text Inspector analyses English texts and reports difficulty, readability, lexical diversity and CEFR levels.Read 30 Sep 2026 · textinspector.com
Intended users
The maker describes the tool as useful for language professionals, academics and students, including preparing teaching materials, tests and evaluating student work.Read 30 Sep 2026 · textinspector.com
Support
The help center explains cancellation through PayPal, subscription-update delays and invoice requests via email.Read 14 Oct 2026 · textinspector.com
Headquarters
Canterbury, Kent, United KingdomRead 28 Sep 2026 · textinspector.com
Founded
2011Read 28 Sep 2026 · textinspector.com
Company
The pricing page identifies Weblingua Ltd as the company behind Text Inspector and gives its England and Wales registration number as 11275226.Read 30 Sep 2026 · textinspector.com
Academic Word List
The Academic Word List and phrases feature supports academic, TOEFL and IELTS material development.Read 14 Oct 2026 · textinspector.com
API access
The API requires account authentication, creates a session ID, accepts analysis submissions and returns parser results through REST endpoints.Read 14 Oct 2026 · textinspector.com
API documentation
Public documentation covers API versions released in 2019, 2020 and 2023 and provides current online v2.1.0 documentation.Read 14 Oct 2026 · textinspector.com
API integrations
The API lets people and organisations incorporate Text Inspector analysis and scoring into their own tools and products.Read 30 Sep 2026 · textinspector.com
API SDK example
The v2.1.0 documentation includes PHP cURL code for creating an authenticated API session.Read 14 Oct 2026 · textinspector.com
Award
The British Council named Text Inspector by Stephen Bax and Versantus the 2017 ELTons Digital Innovation winner for online CEFR-benchmarked text analysis.Read 14 Oct 2026 · britishcouncil.org
British National Corpus
The British National Corpus feature compares usage with British English corpus data.Read 14 Oct 2026 · textinspector.com
CEFR analysis
Its CEFR Level Checker provides a CEFR level for individual words, including their commonness and difficulty.Read 30 Sep 2026 · textinspector.com
COCA integration
The Corpus of Contemporary American English feature analyzes text against American English usage.Read 14 Oct 2026 · textinspector.com
Custom vocabulary
Users can upload a personal Known Words list and see it separately in EVP, BNC and COCA results, graphs and exports.Read 14 Oct 2026 · textinspector.com
Data retention
The FAQ says analysis data is cleared from the website after six hours and each analysis has a private URL that is deleted from the servers after that time.Read 30 Sep 2026 · textinspector.com
English Vocabulary Profile
The English Vocabulary Profile feature reports CEFR levels for individual words.Read 14 Oct 2026 · textinspector.com
Included tools
Listed tools include Statistics and Readability, Lexical Diversity, Scorecard, Tagger, EVP, BNC, COCA, Academic Word List and Phrases, Knowledge-Based Vocabulary Lists, and Metadiscourse Markers.Read 30 Sep 2026 · textinspector.com
Independent classroom finding
A teacher’s case study found Text Inspector flagged feedback vocabulary above students’ level and led to recommendations to simplify or explicitly teach those terms.Read 14 Oct 2026 · clareseltcompendium.wordpress.com
Independent use
Navitas presents Text Inspector as a lexical-profiling tool for aligning course and assessment texts with CEFR standards.Read 14 Oct 2026 · learningandteaching-navitas.com
Language support
English is fully supported; other languages may return only limited statistics or lexical-diversity information.Read 14 Oct 2026 · textinspector.com
Lexical diversity
The lexical-diversity feature measures how varied the vocabulary is in a text.Read 14 Oct 2026 · textinspector.com
Licence
The terms describe the service software as licensed software supplied under subscription terms, rather than open-source software.Read 14 Oct 2026 · textinspector.com
Limit: documentation complexity
The English Australia Journal review says the help pages are wordy, technically dense and cumbersome compared with the main site.Read 14 Oct 2026 · englishaustralia.com.au
Limit: interpretation burden
The English Australia Journal review notes that users without linguistics or language-teaching backgrounds may struggle with the technical data and explanations.Read 14 Oct 2026 · englishaustralia.com.au
Limit: language coverage
A Trustpilot reviewer says the product currently analyzes English only and requests French and Spanish support.Read 14 Oct 2026 · trustpilot.com
Maker legal entity
The service is operated by Weblingua Limited, registered in England and Wales under company number 11275226.Read 14 Oct 2026 · textinspector.com
Metadiscourse markers
The Metadiscourse Markers tool identifies transition words that add information or structure.Read 14 Oct 2026 · textinspector.com
Metrics
The product says it provides an overall difficulty score based on more than 200 metrics.Read 30 Sep 2026 · textinspector.com
Parts of speech
The Parts of Speech Tagger labels the grammatical role of words in sentences.Read 14 Oct 2026 · textinspector.com
Praise: CEFR analysis
Trustpilot reviewers praise the tool for breaking down linguistic features and checking CEFR levels for teaching and assessment.Read 14 Oct 2026 · trustpilot.com
Praise: professional usefulness
An English Australia Journal review found the tool fast and comprehensive, producing extensive analysis within seconds for reading, writing and listening texts.Read 14 Oct 2026 · englishaustralia.com.au
Praise: usability
Trustpilot reviewers repeatedly describe the interface as intuitive, easy to use and helpful for checking writing.Read 14 Oct 2026 · trustpilot.com
Privacy and storage
The privacy policy says personal data is stored in the EEA for as long as the user has an account, and that users can delete their account at any time.Read 30 Sep 2026 · textinspector.com
Privacy compliance
The privacy policy identifies Weblingua Limited as the data controller and references UK data-protection legislation including GDPR.Read 14 Oct 2026 · textinspector.com
Rating on Trustpilot
4.2 out of 5 from 9 reviewsRead 14 Oct 2026 · trustpilot.com
Research coverage
A 2024 Applied Psycholinguistics paper describes Text Inspector as analyzing 63 parts of speech and notes that prior testing relied mainly on student samples rather than diverse samples.Read 14 Oct 2026 · researchportal.port.ac.uk
Scorecard
The Scorecard produces a lexical-profile score and breaks down key language metrics.Read 14 Oct 2026 · textinspector.com
Security and retention
The pricing pages state that analysis data is automatically deleted from the server after six hours, with manual clearing for paid plans.Read 14 Oct 2026 · textinspector.com
Self-hosting
The published materials describe hosted web and API access and provide no self-hosting package.Read 14 Oct 2026 · textinspector.com
Statistics and readability
The statistics tool provides an overview of language level and text complexity.Read 14 Oct 2026 · textinspector.com
System requirements
The maker lists browser-based web access and API access but no downloadable desktop or mobile system requirements.Read 14 Oct 2026 · textinspector.com
Text size limit
The FAQ says the Organisation subscription's 13,000-word limit is currently the largest available because of server restraints.Read 30 Sep 2026 · textinspector.com
Users and usage
The homepage reports more than 2.6 million documents analyzed, over 280,000 unique users and users in more than 180 countries.Read 14 Oct 2026 · textinspector.com

Plans and prices

Free Free 250 words · no extras · data deleted after 6 hours Read 14 Oct 2026 · textinspector.com
Standard £9.96 a month £9.96 monthly or £59.76 yearly 10,000 words · exports · English Vocabulary Profile · Academic Word List · Scorecard · six-hour deletion · manual clearing Read 14 Oct 2026 · textinspector.com
Organisation £59.76 a month £59.76 monthly or £358.56 yearly Up to 10 people · 13,000 words · exports · English Vocabulary Profile · Academic Word List · Scorecard · six-hour deletion · manual clearing Read 14 Oct 2026 · textinspector.com
Developer API £360 a year from £360 per year Full API access · 30-day free test Read 14 Oct 2026 · textinspector.com
API access Price not published from £360 per year; 30 days to test free of charge Full API access for use in your own applications Read 30 Sep 2026 · textinspector.com

Every Text Inspector plan and price →

Strong points and limits

Strong points

  • Overall difficulty score uses more than 200 metrics
  • CEFR levels available for individual words
  • Free plan covers 250 words
  • Analysis data is automatically deleted after six hours

Limits

  • Full support is limited to English
  • Free plan limit is 250 words
  • Organisation plan limit is 13,000 words

Who it suits

Text Inspector suits language professionals, academics, and students working with English texts. It may also suit organisations that want to incorporate text analysis through the API.

Text Inspector in depth

Read the full write-up

Overview

Text Inspector is an English-text analysis service with browser tools and an API, aimed chiefly at language teachers, researchers and students. Its strength is the range of vocabulary and readability measures; its boundaries are equally clear: full support is for English, and the largest text limit is 13,000 words.

Key features

Text Inspector reports difficulty, readability, lexical diversity and CEFR levels. Its overall difficulty score draws on more than 200 metrics, and the service also offers three readability formulas, sentence analysis and clarity recommendations. That breadth can make it useful when a single readability score is too narrow, though the range is most valuable when users can interpret the measures in context.

The CEFR Level Checker assigns individual words a CEFR level and indicates their commonness and difficulty. For educators adapting teaching materials or assessing student work, that word-level view is more actionable than a general score alone. Other tools include Statistics and Readability, Lexical Diversity, Scorecard, Tagger, EVP, BNC, COCA, Academic Word List and Phrases, Knowledge-Based Vocabulary Lists, and Metadiscourse Markers. The API lets people and organisations add Text Inspector analysis and scoring to their own products.

English is the only fully supported language. Other languages may receive limited statistics or lexical-diversity information, so this is not the right service for comprehensive multilingual analysis. The largest stated text limit is 13,000 words on the Organisation subscription, a meaningful ceiling for users processing longer documents.

Pricing

The Free plan costs nothing and allows 250 words, with data automatically deleted after six hours. It suits brief samples, but the low cap rules it out for substantial text analysis.

Standard has custom pricing, billed £9.96 monthly / £59.76 yearly. It raises the limit to 10,000 words and includes data export, English Vocabulary Profile, Academic Word List and Scorecard, automatic deletion after six hours, and manual data clearing. It is the more suitable paid tier for an individual who needs those tools and a larger working document limit; users give up the Organisation plan's added seats and higher ceiling.

Organisation has custom pricing, billed £59.76 monthly / £358.56 yearly. It supports up to 10 people and 13,000 words, with the same listed export, vocabulary and scorecard features and data-clearing options as Standard. The extra cost is most defensible for a small team that needs shared capacity or the largest stated limit.

API access has custom pricing, billed from £360 per year, and includes full API access for use in your own applications. A 30-day period is available to test it free of charge. This is the relevant option for product integration rather than browser-only analysis. All three web plans automatically delete analysis data after six hours; the paid plans also allow manual clearing. Separately, analysis data is cleared from the website after six hours, and each analysis has a private URL deleted from the servers after that period.

Platforms

Text Inspector runs on the web and offers an API. The API broadens its use to organisations incorporating analysis into their own applications, while the web tools suit direct text review. The service fully supports English and may provide limited statistics or lexical-diversity information for other languages.

Who it's for

Text Inspector is best suited to language professionals, academics and students preparing teaching materials, tests or evaluations of student work. Its word-level CEFR information and vocabulary lists make it more relevant to language-focused analysis than to general-purpose writing assistance. Users working with lengthy documents should check the word limits against their workflow, and multilingual teams should look elsewhere for full language coverage.

Pros and cons

Pros: More than 200 metrics plus three readability formulas provide multiple angles on difficulty and readability.

Pros: Word-level CEFR, commonness and difficulty information supports vocabulary-focused teaching and assessment.

Pros: An API allows organisations to integrate analysis and scoring into their own products.

Cons: The Free plan's 250-word limit confines it to short passages.

Cons: English is the only fully supported language, limiting its fit for multilingual analysis.

Cons: The largest stated text limit is 13,000 words, which may not cover longer documents.

Alternatives

For a choice centered on readability tools, compare the Readability Checkers list; readers seeking AI-focused options can use AI Readability Checkers.

Choose Hemingway Editor instead if desktop support for macOS or Windows matters alongside web access; its listed annual individual plans allocate 5,000 or 10,000 AI sentences per month. Readability Formulas is a simpler alternative for free calculators and a Readability Scoring System, with web, extension, macOS and Windows platforms. TextGears may fit better when text translation, paraphrasing, custom dictionary rules or an option not to store texts matter. ProWritingAid is an extension-based option with a free tier capped at 500 words per report run and two report runs per day. Check Readability is worth considering for free web or extension access without an account or usage fees. Readability Analysis Tool (RAT) suits readers who want a free Windows or Linux project with.docx support and German readability rules. For API-only document scoring, ApyHub Readability Scores Documents API offers a free Starter tier with 3,000 atoms per month and one API key. Botoi Readability API is another free-tier API option, with 1,000 requests per day and access to more than 150 endpoints.

Verdict

Text Inspector is a strong fit for language professionals, academics and students who need English-focused readability measures alongside word-level CEFR and vocabulary analysis. Its broad toolkit and API are compelling reasons to choose it; its 250-word free cap, 13,000-word maximum and limited support for other languages are good reasons to look elsewhere.

Verdict

Text Inspector offers several kinds of English-text analysis, from readability and lexical diversity to word-level CEFR information. Its stated language and word-count limits help define where it fits.

Where Specifiction places it

Alternatives to Text InspectorAll alternatives →