Diffey.in: The Online Text Comparison & Diff Tool

Introducing Diffey: The Effortless Online Text Comparison & Diff Tool

Have you ever found yourself struggling to spot the differences between two versions of a document, a piece of code, or even a simple block of text? Whether you’re a developer reviewing code, a writer editing drafts, or a student checking assignments, comparing text can be tedious and error-prone.

That’s why I built Diffey — Free Online Text Comparison and Diff Tool — a free, privacy-friendly online diff tool designed to make text comparison fast, accurate, and enjoyable.

Why Diffey?

There are plenty of diff-tools out there, but I wanted something that was

• Instant: No sign-up, no installation, just open and compare.
• Flexible: Works for code, documents, essays, or any text.
• Privacy-first: Your data never leaves your browser.
• User-friendly: Clean interface, easy to use, and accessible from any device.

Key Features

• Side-by-side Comparison: Paste your texts into two editors and see differences highlighted in real time.
• Granular Control: Choose to compare by line, word, or character for the level of detail you need.
• Handy Tools: Swap, clear, and copy text with a single click.
• Character Count: Instantly see the length of each version.
• Theme Toggle: Switch between light and dark modes for comfortable viewing.
• No Cost, No Catch: 100% free, with no ads or tracking.

Who Is Diffey For?

• Developers: Review code changes, debug, or check merge conflicts.
• Writers & Editors: Track revisions, compare drafts, or check for accidental changes.
• Students & Teachers: Spot similarities or differences in assignments and essays.
• Anyone: If you need to compare text, Diffey is for you!

How to Use Diffey

1. Visit diffey.in
2. Paste your two text versions into the “Version A” and “Version B” editors.
3. Click “Compare” — differences are instantly highlighted.
4. Adjust the diff granularity as needed, swap or clear text, and enjoy a distraction-free experience.

Final Thoughts

I created Diffey to solve my own frustrations with clunky, privacy-invasive diff tools. My hope is that it helps you work faster and with more confidence, whether you’re coding, writing, or just curious about what’s changed.

Give it a try and let me know what you think! Your feedback and suggestions are always welcome.

Happy comparing!
https://diffey.in

Also check out GivenWhenZen — Online Gherkin Editor and Formatter by Diffey.in

Originally published at https://www.kushalbhalaik.xyz on November 15, 2025.