App researcher Jane Manchun Wong first spotted the arrival of Spaces on the web version.
"Twitter is working on @TwitterSpaces preview cards for the web app," she posted in a tweet.
After first testing its audio chat feature Spaces with a small group of people on iOS, Twitter last month said it is now expanding the test to Android users in India, to give them a chance to join, listen, and speak in live, host-moderated audio conversations.
Currently, the feature is available as an early preview for a select few Android users who are part of the app's Beta programme in the country.
In the feature, users can create a Space' that their followers can join to participate in a conversation.
Anyone on Twitter can listen in on the conversation, though only the host can control who gets to speak.
The move comes at a time when invite-only, audio-chat app Clubhouse is fast gaining popularity among the social media users.
Tech companies like LinkedIn and Spotify are also working on Clubhouse-like live audio features, while Facebook is also reportedly working on such feature.