João Ventura’s Free “Flat Angle” Online Astrology Charts

Recently João Ventura sent the following email, offering a free chart service online to astrologer.  It’s very nicely done.  Here is a copy of the email and a sample chart:

“Hello everyone,

Since I started studying astrology, I always had the opinion that astrological knowledge should be shared. However, a key issue is that a clear chart is essential for both the beginner as for the professional astrologer. Unfortunately, most of today’s software are not really directed to the export of high quality graphics.

Therefore, I’m very excited to let you know about Charts. Charts is a new web application that allows you to create high quality astrology charts in a minimalist and distraction-free interface. You can use your charts in your blogs, web forums or for your own publications. Your charts are yours!

Charts should work on all devices and operating systems and it is free!
You can find it at

Let me know of your suggestions, enjoy and share!

João Ventura

The online app produces charts which you can download.  They have Alcabitius Houses. When entering data, you need to know the longitude and latitude of the birth place.  The time uses the 24-hour clock, and the convention for the UTC offset is (-) = West of Greenwich, UK.

Here is a sample chart:



Merry Christmas to all!
Xmas CAT


About Anthony Louis

Author of books about astrology and tarot, including TAROT PLAIN AND SIMPLE, HORARY ASTROLOGY, and THE ART OF FORECASTING WITH SOLAR RETURNS.
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2 Responses to João Ventura’s Free “Flat Angle” Online Astrology Charts

  1. Hi Tony,

    just found this post and I would like to thank you for sharing the news about my Charts app!
    I have been working on it, and it now includes other House systems and chart styles. I hope to keep adding more functionalities, as they appear relevant to users.

    João Ventura

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