Is there a way to extract a list of my currently enrolled/joined telegram channels at once ?
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It really depends on whether they're public or private, and the information you want to export - could you elaborate on that? – arieljannai May 6 '18 at 16:03
Telegram now supports data export as part of the GDPR changes, you can read my more detailed answer on another question on the site.
Specifically about your question, a demonstration from Telegram Desktop, for exporting you channels (and so you'll get to list them all, and can ignore the messages):
answered Jun 26 '18 at 12:39
