ChatGPT Timestamp

Name: ChatGPT Timestamp
Rating: 3.67 (9 reviews)
Author: valmislab.studio

Adds local date and time stamps to every ChatGPT message.

As of May 2026, ChatGPT Timestamp has 723 users and a 3.67/5 rating from 9 reviews in the Productivity category.

valmislab.studio Productivity

Chrome Web Store ↗.crx

Users+0.1%

723

Rating0%

3.67

9 reviews

Reviews0%

Version

1.1

Manifest V3

History

4 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	722	3.67	9	1.1
Apr 21, 2026	708	3.67	9	1.1
May 6, 2026	727	3.67	9	1.1
May 17, 2026	718	3.67	9	1.1
Now	723	3.67	9	1.1

Permissions & access

Permissions: storage
Host access: https://chat.openai.com/*, https://chatgpt.com/*, https://*.chatgpt.com/*

Screenshots

About

How to use
🔹 Install ChatGPT Timestamp, the Chrome extension that adds time stamps to every ChatGPT conversation.
🔹 Open ChatGPT at chat.openai.com or chatgpt.com.
🔹 Every message – yours and the AI’s – will show a subtle, grey date-and-time label.
🔹 Need a cleaner view? Click the toolbar icon to hide/show timestamps. The setting is remembered.

What it does
ChatGPT Timestamp is a lightweight and privacy-focused Chrome extension that adds a local date-and-time stamp to every message in ChatGPT. It works automatically and remembers timestamps across sessions – no clicks, no clutter.

It also optionally measures response time by calculating the difference between when your message is sent and when ChatGPT replies – helpful for monitoring speed and performance.

Key benefits
🔹 Perfect context – Know exactly when you asked or answered a question. Great for research, note-taking, and support logs.
🔹 Works everywhere ChatGPT does – Supports both chat.openai.com and chatgpt.com.
🔹 Locale-aware formatting – Timestamps match your browser's language and region.
🔹 Private by design – All data is stored locally in chrome.storage.local.
🔹 Set-and-forget – Loads automatically and timestamps messages in real time.
🔹 One-click toggle – Show or hide labels instantly without refreshing the page.
🔹 Ultra-lightweight – No external APIs, minimal footprint, and zero performance impact.

How it works (for the curious)
A content script watches for ChatGPT messages using data-message-id, assigns a unique key (conv-<conversationId>__msg-<messageId>), and stores the first timestamp. It then renders the date using Intl.DateTimeFormat, ensuring locale support. A MutationObserver keeps new messages in sync. A minimal service worker manages the icon state across tabs.

Why it’s safe
🔹 No access to your OpenAI account
🔹 No external requests — everything stays on your device
🔹 Minimal permissions — storage + host access only

Get started
Click Add to Chrome, open a ChatGPT conversation, and instantly see clear, local timestamps on every message. Want fewer distractions? Toggle the icon to hide labels until needed. And now you can also measure response time per message. Know exactly when — and how fast — ChatGPT replied.