🕐 LinkedIn Post Date Extractor

Stop guessing. Start knowing.

Transform LinkedIn's vague "2h ago" into precise timestamps like "01/13/2026, 1:29:45 PM"

Because "3 days ago" doesn't cut it when you need the facts.

Installation • Features • How It Works • Use Cases

🤔 The Problem

LinkedIn shows you:

"Posted 2h ago"
"3d ago"
"1w ago"

But you need to know:

Did they post this before or after the news broke?
Was this comment immediate or came days later?
What's the exact timeline of this conversation?

LinkedIn hides the truth. We reveal it.

✨ The Solution

This extension uses a safe Popup Analyzer to reveal exact timestamps from LinkedIn post IDs.

Note: This tool previously supported automatic in-feed timestamp replacement (as shown in the demo). This feature has been disabled for safety reasons to ensure 100% compliance with LinkedIn's Terms of Service. The extension now operates exclusively as a safe URL Analyzer.

Before → After

LinkedIn Shows	Extension Reveals
`2h ago`	`01/13/2026, 1:29:45 PM (2 hours ago)`
`3d ago`	`01/10/2026, 9:15:22 AM (3 days ago)`
`1w ago`	`01/06/2026, 4:30:10 PM (1 week ago)`

Plus: See time differences in comment threads!

Post: 01/13/2026, 8:00:00 AM (5 hours ago)
├─ Comment: 01/13/2026, 8:05:00 AM [5 minutes after post] ← Quick!
└─ Reply: 01/13/2026, 10:30:00 AM [2 hours 30 minutes after post] ← Later

🚀 Quick Start

Installation (2 minutes)

Download this repository or clone it:

git clone https://github.com/dan0dev/linkedin-timestamp.git

Build the extension:

cd linkedin-timestamp
./build.sh         # Mac/Linux
# or
build.bat          # Windows

Load in Chrome:
- Open chrome://extensions/
- Enable Developer mode (top-right toggle)
- Click Load unpacked
- Select the dist folder
- ✅ Done!
Use it:
- Visit LinkedIn.com
- All timestamps are now exact! 🎉

🎯 Features

⚡ Automatic Mode

Zero effort. Maximum insight.

Browse LinkedIn normally
All relative times convert to exact timestamps
Works on feeds, profiles, posts, comments, replies
Real-time updates as you scroll

🎯 Manual Extractor

For specific posts.

Click the extension icon
Paste any LinkedIn post/comment URL
Get instant timestamp extraction
Shows both local time and UTC

💬 Comment Thread Analysis

See the conversation flow.

Exact timestamp for every comment
Time difference from original post
Understand debate timing
Track rapid vs. delayed responses

Example:

Post: January 13, 2026 at 8:00 AM
├─ Alice: 8:05 AM [5 minutes after post] ← Immediate
├─ Bob: 10:30 AM [2.5 hours after post] ← Delayed
└─ Carol: Jan 14, 9:00 AM [1 day after post] ← Very delayed

🌍 Smart Localization

Speaks your language.

Automatically detects your browser language and formats dates accordingly:

🇺🇸 English US: 01/13/2026, 1:29:45 PM
🇭🇺 Hungarian: 2026. 01. 13. 13:29:45
🇩🇪 German: 13.01.2026, 13:29:45
🇯🇵 Japanese: 2026/01/13 13:29:45
🇫🇷 French: 13/01/2026 13:29:45

Works with ALL browser locales!

🌙 Dark Mode

Easy on the eyes.

Automatically detects system dark mode
Professional color scheme
Matches LinkedIn's styling
Perfect for late-night research

♿ Accessibility First

For everyone.

Full WCAG 2.1 AA compliance
Screen reader friendly
Keyboard navigation support
High contrast mode compatible
ARIA labels on all elements

🔒 Privacy Guaranteed

Your data stays yours.

✅ No tracking
✅ No analytics
✅ No external servers
✅ No data collection
✅ 100% local processing
✅ Open source code

🎯 Use Cases

Who Benefits?

Journalists & Fact-Checkers

Verify exact timing of statements and responses
Document precise timelines for news stories
Confirm claims about "immediate" reactions

Job Seekers

Determine if job postings are fresh or old
Track when companies are actively hiring
Prioritize recent opportunities

Business & Market Research

Monitor competitor announcement timing
Analyze posting patterns and engagement windows
Track industry trends with precise timestamps

Academic Researchers

Collect accurate data for social media studies
Analyze engagement timing patterns
Document sources with exact timestamps

Legal & Compliance Teams

Capture exact timestamps for documentation
Create timestamped evidence for records
Meet compliance requirements for social media monitoring

🔬 How It Works

The Science Behind It

LinkedIn uses Snowflake IDs (like Twitter, Discord, Instagram) to generate unique post identifiers. These 64-bit numbers encode the timestamp directly!

Example Post ID:

7416739544328249344

Decoding Process:

Convert to binary
Shift right by 22 bits
Result is Unix timestamp in milliseconds
Convert to readable date

const id = BigInt("7416739544328249344");
const timestampMs = id >> 22n;
const date = new Date(Number(timestampMs));
// Result: January 13, 2026, 7:15:03 AM UTC

It's not hacking—it's just math! The timestamp is publicly embedded in every LinkedIn URL.

📊 Comparison

Feature	LinkedIn Native	This Extension
Timestamp Precision	Relative ("2h ago")	Exact (01/13/2026, 1:29 PM)
Comment Timing	Vague	Exact + time difference
Locale Support	Limited	All locales
Accessibility	Basic	WCAG 2.1 AA
Dark Mode	Yes	Yes
Privacy	Data collected	100% private
Historical Posts	Loses precision	Always accurate

🛠️ For Developers

Tech Stack

Manifest V3 (future-proof)
Vanilla JavaScript (no frameworks)
CSS Variables (theming)
Content Scripts (LinkedIn integration)
Popup UI (manual extraction)

Project Structure

linkedin-timestamp/
├── manifest.json          # Extension config
├── content.js            # LinkedIn page script
├── popup.html            # Extension popup
├── popup.js              # Popup logic
├── styles.css            # Styling + dark mode
├── icons/                # Extension icons
├── build.sh              # Build script (Mac/Linux)
├── build.bat             # Build script (Windows)
└── dist/                 # Built extension (ready to load)

Build Process

# Development
npm install              # Optional (no dependencies needed)
bash build.sh           # Build extension

# The build script:
# 1. Cleans dist/ folder
# 2. Copies all extension files
# 3. Generates dist/ ready for Chrome

Key Functions

// Extract timestamp from post ID
function extractTimestampFromId(postId) {
  const id = BigInt(postId);
  const timestampMs = id >> 22n;
  return new Date(Number(timestampMs));
}

// Format with localization
function formatDate(date) {
  return date.toLocaleString(navigator.language, {
    year: "numeric",
    month: "2-digit",
    day: "2-digit",
    hour: "2-digit",
    minute: "2-digit",
    second: "2-digit",
  });
}

🎨 Screenshots

Popup Interface

LinkedIn Feed (Before)

John Doe • 3rd+
Product Manager
2h ago • 🌐

LinkedIn Feed (After)

John Doe • 3rd+
Product Manager
01/13/2026, 1:29:45 PM (2 hours ago)

🤝 Contributing

We welcome contributions! Here's how you can help:

Found a Bug?

Open an issue with:

Browser version
Extension version
Steps to reproduce
Expected vs actual behavior

Want to Add Features?

Fork the repository
Create a feature branch
Make your changes
Test thoroughly
Submit a pull request

Ideas We'd Love:

📖 Documentation

Installation Guide - Detailed setup instructions
How-To Guide - User manual
Build Guide - Development workflow
UI/UX Improvements - Feature details
Description - Share with friends

🔮 Roadmap

Version 1.0 (Current)

✅ Automatic timestamp replacement
✅ Manual URL extractor
✅ Comment thread support
✅ Dark mode
✅ Localization
✅ Accessibility

Version 1.1 (Planned)

Version 2.0 (Future)

Historical post tracking
Analytics dashboard
API for developers
Mobile browser support

❓ FAQ

Q: Is this legal?

A: Absolutely! We're only decoding publicly available data from LinkedIn URLs. No hacking, scraping, or API violations.

Q: Will LinkedIn ban me?

A: No. This extension only reads data that's already in your browser. It doesn't modify LinkedIn's servers or violate their terms.

Q: Does it work with private posts?

A: Yes, for posts you can see. If you can view a post on LinkedIn, the extension can show its timestamp.

Q: Why isn't it on the Chrome Web Store?

A: Coming soon! We're finalizing privacy policies and testing.

Q: Can I use this for my company?

A: Yes, for internal use. However, GPL-3.0 requires that any modifications you make must remain open source under GPL-3.0. If you distribute modified versions (even internally in some cases), you must share the source code. Cannot be integrated into proprietary closed-source products.

Q: Does it slow down LinkedIn?

A: No. The extension is lightweight and only processes visible posts.

Q: What about comment timestamps?

A: Fully supported! Shows exact time + difference from original post.

Q: Can I change the date format?

A: Currently uses your browser's locale. Custom formats coming in v1.1!

🙏 Credits

Inspiration

This project was inspired by similar timestamp extractors for Twitter and Instagram, applying the snowflake ID decoding technique to LinkedIn.

Built With

Love for transparency ❤️
Frustration with vague timestamps 😤
JavaScript bitwise operators 🔢
Too much coffee ☕

Special Thanks

Everyone tired of "posted recently"
Journalists who need exact times
Researchers analyzing social patterns
You, for reading this far!

📜 License

GPL-3.0 License - Free and open source software.

This project is licensed under the GNU General Public License v3.0 - a strong copyleft license that ensures the software remains free and open source.

Key Points:

✅ Free to use, modify, and distribute
✅ Source code must remain open
✅ Modifications must also be GPL-3.0
✅ Protects user freedom

See LICENSE file for full text.

🌟 Star This Repo!

If this extension saved you time, helped your research, or revealed truth, give it a star! ⭐

It helps others discover this tool and motivates us to keep improving it.

📞 Contact & Support

Issues: GitHub Issues
Discussions: GitHub Discussions
Email: hi@danielkakuk.com

Made with 🔍 for truth-seekers everywhere

⬆ Back to Top

Stop guessing when LinkedIn posts were made. Know for certain.

Install now and never wonder "when exactly?" again.

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