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Timestamps

Adding timestamps to ChatGPT messages

Updated May 27, 2026

Quick answer

ChatGPT hides message-level timestamps in its interface. The data exists in the API but the page does not display it. GPT Master reads that data and renders an inline timestamp above every message (user and assistant alike). Format is "Mar 11, 1:00 AM" for current year, with the year added for older messages. Hover for a full weekday tooltip. Available on all tiers at no extra cost.

Message timestamps in ChatGPT are technically available (the platform records when each message was sent) but the interface does not show them. GPT Master closes that gap by pulling the existing data and rendering it inline in every conversation, so you always have the full timeline in front of you.

  1. 1

    Add GPT Master to your browser

    Install GPT Master from the Chrome Web Store. It runs in Chrome, Edge, Brave, Arc, and Opera. After installing, open chatgpt.com.

  2. 2

    Open any conversation

    Open any conversation, new or old, and timestamps appear automatically. There is nothing to enable or configure. Above each message you will see the exact date and time it was sent.

  3. 3

    Use the hover tooltip for the full date

    Hover any timestamp with your cursor to expand the compact default format into the full version with the weekday name included.

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Frequently asked questions

Why doesn't ChatGPT show timestamps by default?
ChatGPT stores timestamp data but the interface was built without displaying it. GPT Master adds it by reading the existing API data and injecting the display into the page.
Do timestamps appear on both my messages and ChatGPT's replies?
Yes. Every message in a conversation gets a timestamp, both messages you sent and replies from ChatGPT.
What time zone are the timestamps in?
Timestamps are displayed in your local browser time zone, so they reflect your local time when each message was sent.
Can I copy or reference a timestamp from a conversation?
The timestamp text is selectable in the page. You can highlight and copy the date and time from any message just like any other text.

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