Overview

Text Inspector is an English text-analysis service with browser-based tools and an API. It is best suited to language professionals, educators, researchers and students who need vocabulary and readability measures; its narrow language coverage makes it a poor fit for multilingual work.

Its range of analysis is more useful than a single readability score, but the small free allowance and word caps can constrain longer or frequent work.

Key features

Text Inspector assesses difficulty, readability and lexical diversity, and reports CEFR levels. Its overall difficulty score draws on more than 200 metrics, with three readability formulas, sentence analysis and clarity recommendations. These offer different perspectives on a text, although users still need to decide which measures matter for their intended readers.

The CEFR Level Checker assigns individual words a CEFR level and indicates their commonness and difficulty. That can help teachers choose or adapt vocabulary in materials and assess student work. 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 individuals and organisations integrate Text Inspector analysis and scoring into their own applications. English is fully supported; other languages may receive limited statistics or lexical-diversity information, not comprehensive analysis. The largest available text limit is 13,000 words, which may be restrictive for longer documents.

Pricing

The Free plan is free and allows 250 words. Data is automatically deleted after six hours, so it suits short passages or occasional checks rather than substantial documents.

Standard is billed £9.96 monthly / £59.76 yearly. It allows 10,000 words and adds data export, English Vocabulary Profile, Academic Word List and Scorecard, automatic deletion after six hours, and manual data clearing. It is the more practical choice for an individual working with longer texts, but it remains below the 13,000-word Organisation limit.

Organisation is billed £59.76 monthly / £358.56 yearly for up to 10 people. It includes a 13,000-word limit, data export, English Vocabulary Profile, Academic Word List and Scorecard, automatic deletion after six hours, and manual data clearing. It fits small teams that need shared access and the largest available text allowance; the higher fee buys only a modest increase in the per-text limit over Standard.

API access is billed from £360 per year and includes full API access for use in your own applications, with 30 days to test free of charge. It is intended for organisations or developers building Text Inspector analysis into a product, not readers who only need the web tools. The maker also offers a 30-day trial.

Analysis data is cleared from the website after six hours, and each analysis's private URL is deleted from the servers after that period. Personal data is stored in the EEA while an account remains open; users can delete their account at any time.

Platforms

Text Inspector is available on the web and through an API. The web tools suit direct text analysis; the API is for incorporating analysis and scoring into other tools and products.

Who it's for

Language professionals, academics and students are the clearest fit, particularly when preparing teaching materials, tests or evaluating student work. Teams can use the Organisation plan, while developers and organisations building their own products can choose API access. It is not the right choice when full analysis in languages other than English or text limits above 13,000 words are essential.

Pros and cons

Pros

Broad English-language analysis: difficulty, readability, lexical diversity and word-level CEFR information cover more than a basic readability check.
Useful vocabulary tools: word commonness and difficulty, plus vocabulary lists and phrase analysis, can support teaching and assessment work.
Integration option: API access lets organisations use its analysis and scoring in their own applications.
Short-term data handling: analysis data and private URLs are deleted after six hours, with manual clearing also included in paid Standard and Organisation plans.

Cons

English-first coverage: other languages may get only limited statistics or lexical-diversity information.
Restrictive text caps: the free plan stops at 250 words, and even Organisation is limited to 13,000 words.
Paid plans differ in narrow ways: Standard and Organisation share their listed tools, while Organisation chiefly raises the limit and adds seats, at a substantially higher billed price.

Alternatives

For another general readability option, browse Readability Checkers; for tools specifically categorized around AI, see AI Readability Checkers.

Hemingway Editor is worth considering if a desktop option matters: it supports macOS, web and Windows, and its annual Individual plans are priced per month for 5,000 or 10,000 AI sentences.

ProWritingAid is an alternative for writers who want its free plan's 500-word reports, two report runs per day and daily rephrasing and Sparks allowances.

Readability Formulas may suit readers seeking free online readability calculators and a Readability Scoring System, with extension, macOS, web and Windows platforms.

TextGears is an API and web alternative whose PRO plan includes unlimited checks, translations and paraphrases of long texts, custom dictionary rules and an option not to store texts.

ApyHub Readability Scores Documents API is another API option, with a free Starter allowance of 3,000 atoms per month and a Pro plan at 16.00 USD per month for 100,000 atoms per month.

Botoi Readability API offers a free plan with 1,000 requests per day and access to its 150-plus endpoints, making it an alternative for API users comparing request-based allowances.

Check Readability is a free web and extension option with no account requirement or usage fees, for readers who want a no-cost check for personal or commercial use.

Flesch-Kincaid Readability & Grade Level Analyzer is a free web option for an instant check without signup.

Verdict

Text Inspector is a strong fit for English-language educators, academics and language professionals who need both text-level measures and word-level CEFR information. Its breadth and API are the main reasons to choose it; look elsewhere if you need thorough multilingual analysis, longer documents than its 13,000-word ceiling, or a generous free allowance.

	Flesch-Kincaid Calculator	Text Inspector
Free plan	Yes	Yes
Free trial		Yes
Paid from	Free	Free
Platforms	Web	api, Web
Free plan	Yes	Yes
Sentence analysis	Yes	Yes
Clarity recommendations	Yes	Yes
Readability formulas		3 formulas
API access		Yes
Language support		english

Flesch-Kincaid Calculator vs Text Inspector

Flesch-Kincaid Calculator

Text Inspector