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Lightkey - Predictive Typing for Gmail, WhatsApp Web, LinkedIn Messenger, Slack, YahooMail And OutlookMail

Lightkey is the world's only non-cloud-based AI-powered predictive typing & spelling correction software, offering inline text prediction that can save up to 75% of your keystrokes, while typing in any Windows desktop application, supporting 85 languages. With each keystroke Lightkey gradually adapts itself to your typing style and offers only one relevant prediction. Just type & Tab – pressing the Tab key will select Lightkey’s prediction enabling you to focus on your content rather than the typing mechanics. Typing in your non-native language becomes easier with Lightkey’s innovative built-in spelling and grammar correction features. Just type & Tab to select Lightkey’s suggested correction to misspelled words and save you the doubt. Note: this extension requires Lightkey's Windows installation. Please download it in Lightkey's official website:

3.2 out of 59 ratings

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Reese JennerMar 20, 2020

It's not so hard to capture field input for all websites. This really is a must!

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Amin YaOct 1, 2019

This extensions is awesome. But I hope they add support for more websites. Especially Overleaf for writing in Latex!

1 person found this review to be helpful
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JJ LApr 21, 2019

It doesn't work no matter what I do - am I supposed to upgrade it or something? I am confused...

2 out of 2 found this helpful


  • Version
  • Updated
    October 11, 2021
  • Size
  • Languages
  • Developer
    Lightkey Sources LTD
  • Trader
    This developer has identified itself as a trader per the definition from the European Union.


The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

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


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

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