Compare Any Two Texts Instantly on Linux (Clipboard + Selection Hack)

One of my most-used features when coding in IntelliJ is “Compare with Clipboard” — super handy when I want to quickly compare a piece of code with its previous version.

But when the text or code was outside IntelliJ, I had to open a diff tool manually or use “Open Blank Diff Window” inside IntelliJ and paste both snippets by hand.

Recently, I found a much simpler way, and I thought it’s worth sharing here 👇

(This explanation is for Linux, but Windows users can easily adapt it or… just ask AI 😉)

🧩 Setup steps:

1️⃣ Install meld program (or another diff tool with CLI support and use it in the script).

2️⃣ Install xsel and xclip packages (wl-clipboard on Wayland).

3️⃣ Save this script anywhere on your system.

4️⃣ Create a global keyboard shortcut that runs the script.

→ Suggested: Meta + Ctrl + Shift + D.

✅ Now you can:

• Copy the first text snippet.


• Select the second text snippet.


• Hit your shortcut.

meld will pop up, showing both texts side by side — clipboard on the right, selected text on the left.

(You can swap f1 and f2 in the script if you prefer the opposite order.)

💡 This quickly became one of my favorite little productivity hacks.

I can compare any two pieces of text on my system without leaving my current window.

If you have similar tricks, I’d love to hear them!