Free Pro — €5 one-time

DataFocus Ruler 📏

Virtual reading ruler for tables and data — never lose your row again. Built for data analysts.

Install on Chrome View on GitHub

Free Features

Everything you need to track your position, at no cost.

📏

Horizontal Ruler

Follows your cursor or scrolls with keyboard — a guide line that highlights the current row or line.

🔒

Lock in Place

Lock the ruler to read without moving it. Perfect for scanning wide tables.

🎨

Adjustable Opacity & Color

Customize the ruler appearance to fit any background or preference.

🌐

Works Everywhere

Any website — tables, lists, code blocks, spreadsheets, CSV viewers.

⌨️

Keyboard Shortcuts

Alt+R to toggle the ruler, arrow keys to move it up and down.

⚡

Lightweight

Zero performance impact. The extension loads only when you need it.

Pro Features PRO

Unlock advanced tools for a one-time purchase of €5.

🎨

Multiple Colors & Themes

Choose from preset themes or create your own custom ruler style.

📊

CSV Export

Export highlighted data from any table directly to CSV.

🧠

Table Auto-Detection

Smart highlighting that adapts to table structure automatically.

🔲

Row & Column Guides

Crosshair mode — highlight both the row and column simultaneously.

⚙️

Configurable Height & Position

Fine-tune ruler height, offset, and snapping behavior.

Pricing

Simple, transparent pricing.

Free

€0
  • Horizontal ruler on hover
  • Lock ruler in place
  • Adjustable opacity & color
  • Works on any website
  • Alt+R keyboard shortcut
  • Zero performance impact
Install on Chrome

Pro

€5one-time
  • Everything in Free
  • Multiple colors & themes
  • CSV export of highlighted data
  • Table auto-detection
  • Row & column guides
  • Configurable ruler settings

How to Activate Pro

Get up and running in under a minute.

1

Purchase your license

Sign in with Google, then click "Get Pro License" to pay securely via Stripe. Your license key is generated instantly.

2

Open the extension

Click the DataFocus Ruler icon in your Chrome toolbar, then go to Settings.

3

Enter your license key

Paste the key into the Pro License field and click "Activate".

4

Done — enjoy Pro

Themes, CSV export, auto-detection, and crosshair guides are now unlocked.

FAQ

What does DataFocus Ruler do?

It adds a horizontal highlight guide to any webpage, making it easy to track your position across wide tables, datasets, code blocks, or dense text.

Does it work on all websites?

Yes. The ruler works on any webpage — HTML tables, CSV viewers, spreadsheets, code blocks, and more.

Is my data sent anywhere?

No. Everything runs locally in your browser. We don't collect, store, or transmit any data.

What's the difference between Free and Pro?

Free gives you the core ruler with customization and keyboard shortcuts. Pro adds multiple themes, CSV export, table auto-detection, row & column guides, and advanced configuration.

How do I get a Pro license?

Click "Get Pro License" and sign in with Google. After payment via Stripe, your license key appears instantly on the confirmation page.

Ready to focus on your data?

Install DataFocus Ruler and never lose your row again.

Install on Chrome ← Back to Catalog