Text Readability & Content Metrics Analyzer

Flesch & Fog

Comprehensive readability and content analysis suite for copywriters, editors, and SEO specialists. Measures text accessibility using Flesch Reading Ease, Flesch-Kincaid Grade Level, ARI, and Gunning Fog algorithms with syllable metrics and reading durations.

All Tools

Interactive Tool Console

Client-Side Execution • Runs in browser
•
42 words•3 sentences•104 syllables
337 chars
Flesch Reading Ease Score
0 / 100
Complex / Dense

Çok Zor (Lisansüstü / Uzmanlık ve Hukuk metni / Very Difficult)

US Grade Level
Grade 19.1

Suitable for readers at grade 19 education.

Gunning Fog:23.7
Silent Reading
11 sn
220 kelime/dk
Speaking Time
19 sn
130 kelime/dk
Words/Sentence
14
Average density
Complex Words
19
3+ syllables

Live API Integration Public Edge API

Call this tool in your codebase or backend services directly via REST API.

curl -X POST "https://findfreeapi.com/api/v1/tools/readability" \
  -H "Content-Type: application/json" \
  -d '{"text":"The quick brown fox jumps over the lazy dog."}'
POST/api/v1/tools/readability
No API Key Required (Public Edge)

Key Standards & Highlights

Flesch Reading Ease scoring (0-100) with intuitive qualitative rating
Flesch-Kincaid Grade Level, Gunning Fog index, and ARI metrics
Multilingual phonetic syllable and complex word counter
Silent reading time (220 wpm) and spoken speech duration (130 wpm) calculator

Frequently Asked Questions

What does the Flesch Reading Ease score represent?

Flesch Reading Ease scores range from 0 to 100. Higher scores indicate material that is easier to read (60-70 represents plain English suitable for general audiences; 90-100 is very easy).

What is the ideal readability score for SEO and content marketing?

For SEO and blog publishing, the sweet spot is a Flesch score between 60 and 70 (8th to 9th grade reading level). This ensures maximum audience comprehension and higher on-page dwell time.

How are Gunning Fog and ARI indexes interpreted?

Both Gunning Fog and ARI estimate the approximate years of formal education required to understand text on the first reading. A score of 12 corresponds to high school senior level, while 16+ indicates graduate level.