ChatGPT timestamps
GPT Master adds an inline date and time above every ChatGPT message, pulled straight from the ChatGPT API. No hover, no guessing, no sidebar squinting.
4,000+ users · 4.8★ on the Chrome Web Store · Free to install
Updated
Every ChatGPT message gets an inline timestamp so you always know exactly when it was sent.
Quick answer
ChatGPT does not show message timestamps natively. GPT Master solves this by reading message send times directly from the API response and displaying them inline above every message. The extension formats these timestamps as absolute dates and times without making extra network requests or affecting page performance.
Native friction
What changes
What this looks like in practice
A market researcher runs three parallel ChatGPT threads on adjacent topics: one on direct competitors, one on adjacent categories, one on regulatory context. By month two, all three threads have 100+ messages and titles that read identically. Reopening one to grab a citation means guessing which conversation contains which fact. With GPT Master timestamps active, every message shows when it was sent, so the November draft of the regulatory framing is clearly distinct from the December revision in the adjacent-categories thread. The researcher stops cross-pasting from the wrong conversation.
Frequently asked
These questions cover fit, workflow, and what to expect before installing GPT Master, so people can understand the feature in practical terms before clicking through to the Chrome Web Store.
Yes, GPT Master is a free browser extension that injects absolute timestamps directly into the chatgpt.com interface. It works automatically in Chrome, Edge, Brave, Arc, and Opera with no setup required.
When you open a ChatGPT conversation, GPT Master reads the timestamps stored in the ChatGPT API response and injects a small date and time row above each message. The timestamp matches the source data exactly and updates automatically when the conversation reloads.
No. Timestamps are extracted from the same ChatGPT API data the page already loads in your browser. Nothing about the message content is sent to a GPT Master server to display the timestamp.
Absolute. Each message shows the full date and time it was sent, in the same style ChatGPT itself uses internally. Hovering the timestamp surfaces a longer tooltip with the weekday and full time for accessibility.
Yes, in any ChatGPT surface that loads a conversation through the standard API: standard chats, Projects, and Custom GPTs. The timestamp data comes from the same conversation payload, so the row renders the same way on every surface.
Yes. Timestamps are free, with no caps or limits.
See when every ChatGPT message was sent, right above the reply.
Add to Chrome4,000+ users · 4.8★ on the Chrome Web Store · Free to install
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