Text Complexity Analyzer
See a complexity analysis of your text, including readability, average sentence and word length, and the share of long words instantly as you type. No signup, works on any device.
Result
| Complex words (3+ syllables) | -- |
| Overall difficulty | -- |
Reading grade is the average of Flesch-Kincaid and Gunning Fog. Lexical diversity = unique words / total words. All are estimates.
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This text complexity analyzer shows a complexity analysis of your text, including readability, average sentence and word length, and the share of long words as you type, directly in your browser. Paste or write your text and the figures update live. No account, no install, so you can analyse text on any device in seconds.
How to Use the Text Complexity Analyzer Step by Step
- Paste or type your text. Drop your text into the input box, or type directly. The figures begin updating from the first character.
- Read the results. The results show a complexity analysis of your text, including readability, average sentence and word length, and the share of long words, updating live as you type or edit.
- Explore the details. Look through the cards and any table to see the full breakdown for your text.
- Edit and watch it update. Change your text and the figures update instantly, so they always match what you have written.
- Use the results. Read the figures directly for your task, with no button to press.
What the Text Complexity Analyzer Measures and How
The Text Complexity Analyzer shows a complexity analysis of your text, including readability, average sentence and word length, and the share of long words. It analyses your text as you type and presents the results live, so the figures are always current. It combines several signals, the average sentence length, average word length, the proportion of long words, and readability scores, into an overall picture of how complex your text is to read.
Complexity analysis helps you judge whether your writing suits your audience. Shorter sentences and words, and fewer long words, generally read more easily, so the figures guide you towards simpler or more advanced writing depending on who you are writing for.
Everything is worked out in your browser as you type. The analysis combines estimated measures like readability and syllable counts, so treat the results as guides to how complex your text is rather than exact measures.
Because it runs on your device, your text is never uploaded. The results appear instantly and privately, with nothing leaving your device. The tool works the same on a phone, tablet or computer, with no account and no limit on how much text you can analyse.
What the Figures Mean
| Measure | What it shows | Note |
|---|---|---|
| Readability | Reading-ease and grade scores | Overall difficulty |
| Avg sentence length | Words per sentence | Sentence complexity |
| Avg word length | Characters or syllables per word | Word complexity |
| Long-word share | Percent of long words | Vocabulary difficulty |
Who Uses This Tool
Pro Tips for Using the Text Complexity Analyzer
Common Mistakes to Avoid
Related Tools You May Need Next
our Text Readability Score Calculator, Syllable Counter and Sentence Counter feed into complexity analysis.
Frequently Asked Questions
How do I use the text complexity analyzer?
Paste or type your text into the input box and the results appear instantly, showing a complexity analysis of your text, including readability, average sentence and word length, and the share of long words, updating live as you edit. There is no button to press: the figures refresh the moment you type. Read them directly for your task, and change your text to see how the figures respond. No account is required and there is no limit on how much text you can analyse.
What does the text complexity analyzer measure?
It shows a complexity analysis of your text, including readability, average sentence and word length, and the share of long words. It combines several signals, the average sentence length, average word length, the proportion of long words, and readability scores, into an overall picture of how complex your text is to read. The figures are worked out from your text as you type and presented together, so you get a clear picture of your text at a glance, updating live whenever you add, remove or change anything.
What do the figures mean?
Complexity analysis helps you judge whether your writing suits your audience. Shorter sentences and words, and fewer long words, generally read more easily, so the figures guide you towards simpler or more advanced writing depending on who you are writing for. Each figure is worked out a specific way, so reading them together gives a fuller picture than any single number. The tool lays out the results clearly so you can see what your text contains and use the figures for whatever you are working on.
Does it change my text?
No. The tool measures and reports figures about your text; it does not edit or alter it. Your text stays exactly as you typed it, and the figures simply describe it. If you want to change the text, you edit it yourself and watch the figures update to match your changes.
Is my text uploaded anywhere?
No. The analysis happens entirely in your browser, so your text is never sent to a server. The figures appear the instant you type, and nothing you write leaves your device. You can analyse sensitive or unpublished text knowing it stays on your own device.
Can I use it on my phone?
Yes. The tool runs in your browser and works the same on a phone, tablet or computer, with no app to install. Paste or type your text and the figures appear instantly. Because everything runs on your device, it is just as fast and private on mobile as on desktop, so you can analyse text anywhere.
Is there a limit on how much text I can check?
No. You can paste or type as much text as you like and the tool analyses all of it, updating the figures live. There is no account, no signup and no usage limit, so you can check a short note or a long document, as often as you need, at no cost.
Is the text complexity analyzer free?
Yes, it is completely free with no account and no limit. You can analyse as much text as you like, on any device, at no cost. The tool runs in your browser, so there is nothing to install, and the figures appear instantly as you type, showing a complexity analysis of your text, including readability, average sentence and word length, and the share of long words.