Difference Checker
Compare two texts line by line to find differences.
Text A
Text B
Differences
🔍 Difference Checker – Compare Text Files & Spot Changes Instantly
Welcome to NotepadHub’s Difference Checker — a free online tool that helps you easily compare two blocks of text side-by-side and highlight what’s different. Whether you're reviewing revisions, debugging scripts, or proofreading documents, this tool lets you instantly spot even the smallest changes. ⚡
📌 Why Use a Text Comparison Tool?
Comparing two versions of a document, dataset, or code snippet manually can be time-consuming and error-prone. Our tool automates this process, highlighting insertions, deletions, and updates between two text inputs. It’s perfect for developers, writers, students, and editors who need to ensure accuracy and consistency.
⚙️ Features You’ll Love
- 🆚 Compare two blocks of plain text or code
- 🔦 Highlights additions, deletions, and changes
- 💻 Works with large documents and multiline inputs
- 🌗 Dark and light mode for comfortable reading
- 📱 Fully mobile-friendly and responsive
- 🔐 100% private – all data stays in your browser
💡 Use Cases
- 🧑💻 Developers comparing different versions of HTML, CSS, or JS code
- ✍️ Writers reviewing edits and rewrites
- 📄 Editors spotting grammar or typo corrections
- 📊 Analysts verifying file differences in exported reports
- 🎓 Students checking changes in assignments or documentation
🧪 How to Use
- Paste your original content into the left box
- Paste the updated or alternate content into the right box
- Click the “Compare” button
- View the differences visually highlighted below
🔗 Want to Edit Before Comparing?
Clean and format your text first using our popular Text Tools to ensure a fair and useful comparison:
- 🧼 Use Remove Extra Spaces for better structure
- ✂️ Clean blank lines using Remove Empty Lines
- 🔁 Eliminate repeated lines with Remove Duplicate Lines
- 🔍 Use Find and Replace Tool to adjust content before comparison
- 📏 Flatten formatting via Remove Line Breaks
- 🔠 Reformat casing with Convert Case
- 📧 Clean emails using Email Extractor
- 🔗 Extract hyperlinks from compared blocks using URL Extractor
- 😶 Strip emojis with Remove Emojis before checking formal documents
- 🔃 Want to reverse lines? Use Reverse List
- 🗂️ Sort alphabetically using Sort Text
- 📊 Use Word Counter to check how edits affect word count
- 📝 Clean and prepare code using our Online HTML Compiler
- 🧑💻 Or do quick edits in our Classic Notepad
🔐 Is It Secure?
Yes. All text stays in your browser — nothing is uploaded, stored, or tracked. You can compare confidential files, client work, or personal notes with full confidence in your privacy.
🌍 Accessible from Any Device
Compare text differences on the go. Whether you’re on a phone, tablet, or desktop, this tool adapts perfectly. It’s lightweight, fast, and works in all modern browsers.
💡 Power Tip
Want advanced multi-file comparison or folder-based editing? Use our Modern Notepad App — it supports advanced editing, multiple tabs, file renaming, and folder management.
✅ Try It Now
Paste your original and modified text — and instantly visualize what changed. Whether you’re debugging a script or reviewing document drafts, the Difference Checker gives you clarity at a glance.
Brought to you by NotepadHub — the web’s cleanest, fastest collection of free online notepad and text tools. Bookmark this page for your future comparisons!