Flesch-Kincaid Calculator for Web3
Paste your copy and see two things: how hard it is to read (Flesch + 5 more formulas), and how likely answer engines are to actually cite your protocol. Built for Web3 writing - no false “complex word” penalties on industry terms.
Your text is analyzed on this device only. Nothing is uploaded, stored, or sent to a server - the calculator works even if you lose your connection after the page loads.
Forever Free · No signup · No word limit · No data capture, ever · 100% offline in your browser
For developers & AI agents
Score the readability of any text or content with a single JSON request - no browser, no signup, no key, no account. Works with any AI agent: ChatGPT, Claude, Gemini, Perplexity, and coding assistants.
Share this with any AI agent
Use the PromptRaise readability JSON endpoint to measure the readability of your text or content. Send a POST request to https://promptraise.com/json/readability with a JSON body {"text": "<the text to score>"}. It returns six readability scores (Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau, ARI). No key or account needed.Or call it directly
curl -s -X POST https://promptraise.com/json/readability \
-H 'Content-Type: application/json' \
-d '{"text": "Your Web3 copy goes here..."}' | jq -Flesch 45-60 (a bit denser, still readable).
Paste text above and hit Analyze - or use the Web3 example to see how it works.
Why readability and AI citation matter for Web3
Answer engines like ChatGPT, Perplexity, Claude and Gemini favor content that is easy to parse and grounded in verifiable facts. When your protocol documentation is clearly written and defines its terms, these engines are far more likely to quote it directly - turning your docs into a source of AI referral traffic.
PromptRaise's Flesch-Kincaid calculator for Web3 is Web3-aware: it recognizes protocol and chain vocabulary (DeFi, TVL, AMM, tokenomics, liquidity) so legitimate industry language is not falsely counted as complex. The Citation Readiness score layers on top of classic readability to estimate how likely each answer engine is to cite your text.
Flesch & AI citation, explained
A score of 60-70 is generally regarded as plain English that most adults can read easily. Higher scores are easier to read; lower scores are harder. For Web3 content, a 45-60 range is often appropriate for technical explainers.
It is a 0-100 PromptRaise signal estimating how likely answer engines are to pull a clean, grounded, citable sentence from your text, based on entity clarity, defined terms, groundable statements and sentence structure.
The calculator runs six formulas at once: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau and the Automated Readability Index (ARI). Seeing them together shows where they disagree, which is usually more informative than any single figure.
Flesch Reading Ease scores readability out of 100 using sentence length and syllable count. Flesch-Kincaid Grade Level converts that into a U.S. school grade. Gunning Fog focuses on long words and sentence length. SMOG counts hard words to estimate an education level. Coleman-Liau uses characters instead of syllables. ARI counts characters per word and words per sentence to give a grade.
No. The calculator runs 100% in your browser. Your text is analyzed on your device, never uploaded or stored - it works even offline after the page loads.
Embed this calculator on your site
Embed once, use free forever
Free, no-account, no-API-key embeddable widget. Drop it into your docs, blog, or landing page - the calculator runs entirely in the visitor's browser, so it costs you nothing and captures no data.
Free forever · No account needed · No API key · No data capture
Copy the embed code
One line of HTML - copy it with the button below.
Paste it into your page
Anywhere in your site's HTML: docs, blog post, or landing page.
Publish and you're done
The calculator appears instantly, 100% client-side. Nothing to configure.
<iframe src="https://promptraise.com/free/flesch-kincaid-calculator/embed" width="100%" height="700" style="border:1px solid #dde0e5;border-radius:12px" title="Flesch-Kincaid calculator by PromptRaise" loading="lazy" allow="clipboard-write"></iframe>
Embedding FAQ
Yes. No account, no API key, no pricing tier. The calculator runs entirely in the visitor's browser, so there is no server cost for you or for us.
It is a plain iframe, so it works on any site that allows iframes - docs platforms, blogs, landing pages, Notion embeds, and most static site builders.
No. The widget is lightweight and lazy-loads. Visitors' text never leaves their browser - nothing is tracked, stored, or captured.
The embed matches the calculator's own design out of the box. For deeper customization, contact readability@promptraise.com.
Methodology & how it works
This calculator runs entirely in your browser - pasted text never leaves your device. The six formulas (Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau and ARI) are computed client-side from their original published equations. The Citation Readiness score and per-engine verdicts are PromptRaise heuristics built from four citation signals: entity clarity, defined terms, groundable statements and sentence structure. Web3 vocabulary (DeFi, TVL, AMM, protocol names) is scored with a Web3-aware dictionary so legitimate industry terms are not falsely penalized as complex.
Questions or feedback? [email protected]