Freedom251 › AI Readability Checkers
Text Inspector
What Text Inspector is
Text Inspector analyzes English writing for difficulty, readability, lexical variety, and CEFR levels. Its overall difficulty score draws on more than 200 metrics, and its CEFR Level Checker gives levels for individual words along with their commonness and difficulty. The 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. The maker identifies language professionals, academics, and students as users, including people preparing teaching materials or tests and evaluating student work. An API lets people and organizations add its analysis and scoring to their own tools and products. English is fully supported; other languages may receive limited statistics or lexical-diversity information. The Free plan covers 250 words and automatically deletes data after six hours. The Standard plan is listed at £9.96 monthly or £59.76 yearly; Organisation is listed at £59.76 monthly or £358.56 yearly and allows up to 13,000 words, the largest stated limit. API access starts from £360 per year and includes 30 days to test free of charge. Analysis data and private analysis URLs are deleted after six hours; personal data may be stored in the EEA while an account remains active.
Who it suits
Text Inspector suits language professionals, academics, and students assessing English writing or preparing teaching materials and tests. Its API may suit people or organizations adding text analysis to their own products.
What it does well
- Overall difficulty score uses more than 200 metrics.
- Checks CEFR levels for individual words.
- Offers an API for integrating analysis and scoring.
- Free plan covers 250 words.
- Analysis data and private URLs are cleared after six hours.
What to know first
- Fully supports English; other languages get limited information.
- Free plan is limited to 250 words.
- Organisation's 13,000-word limit is the largest available.
- Personal data may remain stored while an account exists.
Limits
The Free plan covers 250 words and automatically deletes data after six hours. Standard covers 10,000 words; Organisation covers up to 10 people and 13,000 words, currently the largest stated text limit. Analysis data and private analysis URLs are deleted after six hours.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 250 words · no extras · data deleted after 6 hours | Free |
| Developer API | from £360 per year · Full API access · 30-day free test | £360 a year |
| Organisation | £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 | £59.76 a month |
| Standard | £9.96 monthly or £59.76 yearly · 10,000 words · exports · English Vocabulary Profile · Academic Word List · Scorecard · six-hour deletion · manual clearing | £9.96 a month |
| API access | from £360 per year; 30 days to test free of charge · Full API access for use in your own applications | On request |
As textinspector.com lists them, read 14 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Text Inspector website.
- Choose the web service or API access, depending on whether you want to analyse text online or add analysis to an application.
- Start with the Free plan or select a listed subscription plan.
- For API access, use the 30-day free testing period before paid access billed from £360 per year.
Verdict
Text Inspector offers a wide set of English-text measures, individual-word CEFR checks, and API access. Consider the word limits and its limited information for languages other than English before selecting a plan.
Questions
Is there a free plan?
Yes. The Free plan costs nothing and covers 250 words, with data automatically deleted after six hours.
What does Text Inspector cost?
Standard is billed at £9.96 monthly or £59.76 yearly. Organisation is billed at £59.76 monthly or £358.56 yearly, and API access is billed from £360 per year.
Which platforms does it support?
Text Inspector is available on the web and through an API.
Which languages does it support?
It fully supports English texts. Other languages may receive limited statistics or lexical-diversity information.
Who makes Text Inspector?
The company behind Text Inspector is Weblingua Ltd, registered in England and Wales under number 11275226.
How long is analysis data retained?
Analysis data and private analysis URLs are cleared after six hours. Personal data is stored in the EEA while a user has an account, and users can delete their account at any time.
Facts from Text Inspector's own pages
- Academic Word List
- The Academic Word List and phrases feature supports academic, TOEFL and IELTS material development. · textinspector.com, 14 Oct 2026
- API access
- The API requires account authentication, creates a session ID, accepts analysis submissions and returns parser results through REST endpoints. · textinspector.com, 14 Oct 2026
- API documentation
- Public documentation covers API versions released in 2019, 2020 and 2023 and provides current online v2.1.0 documentation. · textinspector.com, 14 Oct 2026
- API integrations
- The API lets people and organisations incorporate Text Inspector analysis and scoring into their own tools and products. · textinspector.com, 30 Sept 2026
- API SDK example
- The v2.1.0 documentation includes PHP cURL code for creating an authenticated API session. · textinspector.com, 14 Oct 2026
- Award
- The British Council named Text Inspector by Stephen Bax and Versantus the 2017 ELTons Digital Innovation winner for online CEFR-benchmarked text analysis. · britishcouncil.org, 14 Oct 2026
- British National Corpus
- The British National Corpus feature compares usage with British English corpus data. · textinspector.com, 14 Oct 2026
- CEFR analysis
- Its CEFR Level Checker provides a CEFR level for individual words, including their commonness and difficulty. · textinspector.com, 30 Sept 2026
- COCA integration
- The Corpus of Contemporary American English feature analyzes text against American English usage. · textinspector.com, 14 Oct 2026
- Company
- The pricing page identifies Weblingua Ltd as the company behind Text Inspector and gives its England and Wales registration number as 11275226. · textinspector.com, 30 Sept 2026
- Custom vocabulary
- Users can upload a personal Known Words list and see it separately in EVP, BNC and COCA results, graphs and exports. · textinspector.com, 14 Oct 2026
- 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. · textinspector.com, 30 Sept 2026
- English Vocabulary Profile
- The English Vocabulary Profile feature reports CEFR levels for individual words. · textinspector.com, 14 Oct 2026
- Founded
- 2011 · textinspector.com, 28 Sept 2026
- Headquarters
- Canterbury, Kent, United Kingdom · textinspector.com, 28 Sept 2026
- 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. · textinspector.com, 30 Sept 2026
- 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. · clareseltcompendium.wordpress.com, 14 Oct 2026
- Independent use
- Navitas presents Text Inspector as a lexical-profiling tool for aligning course and assessment texts with CEFR standards. · learningandteaching-navitas.com, 14 Oct 2026
- Intended users
- The maker describes the tool as useful for language professionals, academics and students, including preparing teaching materials, tests and evaluating student work. · textinspector.com, 30 Sept 2026
- Language support
- English is fully supported; other languages may return only limited statistics or lexical-diversity information. · textinspector.com, 14 Oct 2026
- Lexical diversity
- The lexical-diversity feature measures how varied the vocabulary is in a text. · textinspector.com, 14 Oct 2026
- Licence
- The terms describe the service software as licensed software supplied under subscription terms, rather than open-source software. · textinspector.com, 14 Oct 2026
- Limit: documentation complexity
- The English Australia Journal review says the help pages are wordy, technically dense and cumbersome compared with the main site. · englishaustralia.com.au, 14 Oct 2026
- 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. · englishaustralia.com.au, 14 Oct 2026
Where Text Inspector stands on Freedom251
- AI Readability Checkers#20 of 26
- Readability Checkers#22 of 25