🕐 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

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🤔 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.

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✨ 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

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🚀 Quick Start

Installation (2 minutes)

1. Download this repository or clone it:

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

2. Build the extension:

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

3. Load in Chrome:

   • Open chrome://extensions/
   • Enable Developer mode (top-right toggle)
   • Click Load unpacked
   • Select the dist folder
   • ✅ Done!

4. Use it:

   • Visit LinkedIn.com
   • All timestamps are now exact! 🎉

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🎯 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

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🎯 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

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🔬 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:

1. Convert to binary
2. Shift right by 22 bits
3. Result is Unix timestamp in milliseconds
4. 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.

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📊 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

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🛠️ 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",
  });
}

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🎨 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)

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🤝 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?

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

Ideas We'd Love:

• Copy timestamp to clipboard
• Export timestamps (CSV/JSON)
• Batch URL processing
• Keyboard shortcuts
• Custom date formats
• Chrome Web Store listing

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📖 Documentation

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

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🔮 Roadmap

Version 1.0 (Current)

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

Version 1.1 (Planned)

• Chrome Web Store release
• Firefox support
• Settings panel
• Custom date formats
• Export functionality

Version 2.0 (Future)

• Historical post tracking
• Analytics dashboard
• API for developers
• Mobile browser support

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❓ 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!

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🙏 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!

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📜 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.

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🌟 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.

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📞 Contact & Support

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

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Made with 🔍 for truth-seekers everywhere

⬆ Back to Top

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

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