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Readability Desk – Readability Score & AI Rewrite

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Overview

Readability of any selected text: Flesch score, grade level, long sentences, passive voice. Runs locally. Optional AI rewrite.

Check how easy any text is to read, right in your browser. Select text on any web page, then right-click and choose "Readability score", or click the toolbar icon. You can also paste text into the panel. Free, and calculated on your computer. Nothing is sent anywhere: • Flesch Reading Ease and an overall reading level • Flesch-Kincaid grade, Gunning Fog, SMOG, Coleman-Liau and Automated Readability Index • Word, sentence and syllable counts, average sentence length, complex words • Long sentences (25+ and 35+ words) and passive-voice hints highlighted in your text Optional paid plan ($3.99/month or $29.99/year): AI rewrite of your text to a US school grade level you choose (grade 3 to 12), 150 rewrites a month, with the new score shown next to the result. Only the text you choose to rewrite is sent to our server and to Claude (Anthropic) to produce the rewrite; it is not stored. Good for teachers, students, writers, editors and anyone writing for a general audience. Made by SKYSEED TECH LLC. Help: support@k5english.com More about the formulas: https://k5english.com/chrome-extension/

Details

  • Version
    0.1.0
  • Updated
    October 17, 2026
  • Offered by
    jun
  • Size
    76.17KiB
  • Languages
    English (United States)
  • Developer
    Skyseed Tech LLC
    204 E Argyle St APT 2 Rockville, MD 20850 US
    Email
    support@skyseedllc.com
    Phone
    +1 240-618-6465
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
  • D-U-N-S
    142238215

Privacy

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Readability Desk – Readability Score & AI Rewrite has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

Readability Desk – Readability Score & AI Rewrite handles the following:

Authentication information
Website content

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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