Free Writing Tool · No Sign-up
Readability Checker — Free Flesch Score Test
Check your readability score online in seconds: Flesch Reading Ease, Flesch-Kincaid grade level, complex-word percentage, and the exact sentences to trim. Everything runs in your browser — your text is never uploaded.
Flesch Reading Ease
Paste text below to see the score (0–100, higher = easier).
Flesch-Kincaid Grade Level
The US school grade needed to read your text comfortably.
How to Check Readability in 3 Steps
- 1
Paste your text
Blog post, email, essay, landing page — the score updates live as you type or edit.
- 2
Read the two scores
Reading Ease (0-100, higher = easier) tells you how it feels; grade level tells you who can follow it.
- 3
Trim what the tool flags
Split the flagged long sentences, shorten complex words, and watch the score climb in real time.
What Your Readability Score Means
The Flesch Reading Ease scale, decoded — with the audience each band actually fits:
| Score | Level | Grade | Best for |
|---|---|---|---|
| 90–100 | Very easy | 5th grade | Kids' content, ultra-simple copy |
| 80–89 | Easy | 6th grade | Consumer marketing, emails |
| 70–79 | Fairly easy | 7th grade | Blogs, social posts — the sweet spot |
| 60–69 | Standard | 8th–9th grade | News, most web content |
| 50–59 | Fairly difficult | 10th–12th grade | Technical guides, B2B |
| 30–49 | Difficult | College | Academic, legal, expert docs |
| 0–29 | Very difficult | Postgraduate | Research papers only |
The benchmark most writers miss: mainstream success lives lower than pride wants. Bestselling novels average grade 7; the most-shared articles online cluster around grade 8. Writing "down" is not dumbing down — it is respect for the reader's time, and it is the house style of every publication people actually finish.
Why Readability Matters for SEO and AI Search
Google does not use a readability score as a ranking factor — but it measures what readability *causes*. Hard-to-read pages get abandoned; abandoned pages send weak engagement signals; and pages nobody finishes earn no links or shares. Readable writing is also structurally easier for AI answer engines to quote, which is why clear, front-loaded prose is a pillar of the AI search ranking playbook and of SEO-friendly writing generally.
The workflow that works: draft freely, run this check, fix the flags, then run the SEO title checker on your headline and the word counter for length — three checks, five minutes, publish with confidence. Writers using the AI-assisted writing workflow should note: AI drafts often score *too* uniform — same sentence length everywhere — so the human edit pass is where rhythm returns.
5 Fixes That Raise Any Readability Score
Split sentences over 25 words
Sentence length is the #1 score driver. One idea per sentence — the period is your friend.
Swap long words for short ones
Utilize → use, approximately → about, demonstrate → show. Syllables per word is the #2 driver.
Break up paragraph walls
3-4 sentences per paragraph on the web. White space is a readability feature the formulas cannot even see.
Front-load the point
Answer first, context after — readers (and AI search engines) reward pages that get to it.
Read it aloud once
Anywhere you stumble out loud, a reader stumbles silently. Fix those spots and re-check.
One honest limit: formulas count syllables and sentence lengths — they cannot judge clarity of *thought*. A grade-6 score with muddled logic still loses readers, and a grade-11 score can be perfectly right for an expert audience. Use the score as a smoke alarm, not a style guide.
Frequently Asked Questions
How do I check my readability score online for free?
Paste your text into the checker above — it instantly calculates the Flesch Reading Ease score, Flesch-Kincaid grade level, and flags overlong sentences. Free, no sign-up, and the text never leaves your browser.
What is a good readability score?
For blogs, marketing, and general web content, aim for a Flesch Reading Ease of 60-80 (grade 6-9). News writing averages around 60; academic writing falls below 30. Higher scores mean easier reading — and easier reading keeps visitors on the page.
What is the Flesch-Kincaid grade level?
It estimates the US school grade needed to understand your text on first read — a grade of 8.0 means an eighth-grader can follow it. It is computed from sentence length and syllables per word, the two biggest drivers of reading difficulty.
Does readability affect SEO?
Indirectly but meaningfully: readable content earns longer dwell time, more completed reads, and more shares — engagement signals that correlate with rankings. Clear, well-structured text is also easier for AI search engines to quote accurately.
How do I improve a bad readability score?
Three fixes handle most of it: split every sentence over 25 words, swap 3+ syllable words for shorter ones (utilize → use), and break long paragraphs. Rerun the check after each pass — scores respond fast.
Complete Your Writing Toolkit
Related Free Tools
Related Tools
All ToolsWord & Character Counter
Count words, characters, sentences and paragraphs with estimated reading time.
SEO Title Checker
Measure title characters and approximate pixels, preview desktop/mobile snippets and compare three drafts.
Text to Speech Reader
Listen to text using voices available in your browser or OS. Voice availability varies; there is no MP3 export.
Diff Checker
Compare two pasted texts and see line-by-line additions, deletions and unchanged content.