Okuzeka
Free · No sign-up · Runs in your browser

Free Language Learning Tools

Free tools for English learners to test your vocabulary, check the CEFR level of a text, measure your reading speed and find the level of any word. They run in your browser, so your text stays on your device.

  • 16 free tools
  • No account needed
  • Private: text is not uploaded
  • Works on mobile
Test your vocabulary Check a text's level
Tapping a word in the Okuzeka app to see its meaning

Test your English

Quick, free checks of your level and vocabulary.

English Level TestFind your A1–C2 level with a 5, 10 or 30-minute grammar and vocabulary test.FreeNo sign-upCertificateEnglish Vocabulary Size TestEstimate how many English words you know in about three minutes, with a CEFR level.FreeNo sign-upRuns in your browserHow Many English Words Do I Know?A 90-second word check that counts the English words you recognize.FreeNo sign-upRuns in your browser

Reading

Check whether a text suits your level and how long it takes to read.

CEFR Text Level CheckerPaste English text to estimate its CEFR level and see every word colored from A1 to C2.FreeNo sign-upRuns in your browserText Difficulty CheckerFind out if an English text is comfortable, challenging or too hard for your level.FreeNo sign-upRuns in your browserEnglish Reading Speed TestMeasure your English reading speed in words per minute, with a short comprehension check.FreeNo sign-upRuns in your browserReading Time CalculatorHow long will a book, article or speech take to read? Enter words or paste the text.FreeNo sign-upRuns in your browser

Vocabulary

Word levels, frequency lists and word lists by CEFR level.

Word Frequency AnalyzerCount how often each word appears in a text, with lexical diversity and coverage.FreeNo sign-upRuns in your browserEnglish Word Level CheckerLook up the CEFR level, frequency rank and meaning of any English word.FreeNo sign-upRuns in your browserA1–C2 Vocabulary Level CheckerSort the words of any English text into A1, A2, B1, B2, C1 and C2 lists.FreeNo sign-upRuns in your browserEnglish Irregular Verbs List and Test164 irregular verbs with past simple and past participle, sorted by frequency, with a typing test.FreeNo sign-upRuns in your browserThe 1000 Most Common English WordsThe 1,000 (and 3,000) most frequent English words with CEFR levels, a self-test and a printable list.FreeNo sign-upRuns in your browserCommon English Phrasal Verbs130+ everyday phrasal verbs with meanings, example sentences and a fill-the-particle test.FreeNo sign-upRuns in your browserCommon English Idioms98 everyday idioms with meanings and examples, sorted by how common they are, with a meaning quiz.FreeNo sign-upRuns in your browserCommonly Confused English WordsAffect or effect, borrow or lend, say or tell: 39 tricky pairs with simple rules, examples and a fill-the-gap quiz.FreeNo sign-upRuns in your browserNumbers in English: Number to WordsWrite any number in English words, UK or US style, with ordinals, years, speech and a listening quiz.FreeNo sign-upRuns in your browserA1–C2 English Vocabulary ListsThe word list of every CEFR level, sorted by frequency, with a one-minute self-test per level.FreeCopyable6 levels

Writing and text analysis

Readability scores for your own English writing.

English Readability CheckerFlesch Reading Ease, Flesch–Kincaid grade, Gunning Fog, SMOG and long-sentence highlights.FreeNo sign-upRuns in your browser
Read with Okuzeka

Grow the level you just measured, one book at a time

These tools show you where you are. Okuzeka helps you move up: read books at your level, understand unknown words instantly and keep them with flashcards.

Okuzeka reader showing the meaning of a tapped word
Tap a word, see the meaningOkuzeka explains the word as it is used in that sentence, not a list of every dictionary meaning.
Okuzeka flashcards with an example sentence
Turn new words into flashcardsEvery word you save keeps its example sentence, so you review it in the context where you met it.
Choosing a translation language in Okuzeka
Explanations in 180+ languagesChoose your own language for meanings and translations, from Turkish and Spanish to Arabic and Japanese.
Adding your own PDF or EPUB books in Okuzeka
Free books or your own PDFsStart with free graded books from A1 to C2, or upload the PDF and EPUB files you already have.
Download Okuzeka on the App StoreGet Okuzeka on Google Play
Read free books on the web

Which tool should I use first?

How the tools work

The vocabulary and CEFR tools use a list of about 32,000 English words ranked by frequency, with CEFR levels from the CEFR-J Wordlist (A1–B2) and the Octanove Vocabulary Profile (C1–C2). The list is downloaded once and the analysis runs in your browser: the text you paste is never sent to our servers.

Every result is an estimate and is labeled as one. Each tool page explains its method and its limits.

FAQ

Frequently asked questions

Are these English learning tools really free?

Yes. All tools are free, with no sign-up and no limit on how often you use them.

Do you store the text I paste?

No. The text tools run entirely in your browser. Your text is not uploaded, stored or used for anything else.

Are the results accurate?

They are research-based estimates. CEFR levels come from published word lists, and the methods are explained on each page. For important decisions, use them alongside a teacher's judgment or an official exam.

Do the tools work for languages other than English?

Not yet. The current tools are for English text and English learners.

What is Okuzeka?

Okuzeka is a reading app for language learners. You read free books or your own PDFs and EPUBs, tap any word to see its meaning in context in your language, and save words as flashcards. It works on the web, iOS and Android.

Read at your level

Free English books from A1 to C2

Found your level? Now read at it: the books on Okuzeka are sorted by level and free to read.

A1booksA2booksB1booksB2booksC1booksC2books