Text Compare & Diff Checker
Instantly find the differences between two blocks of text or code. Supports granular character-level diffing. Processed securely in your browser.
Granular Character-by-Character Text & Code Diffing
Whether you're a programmer comparing code versions or a writer looking for subtle typos between drafts, our free Diff Checker provides unparalleled precision. Unlike most tools that only compare line-by-line, LensText supports granular character and word-level diffing.
How to Use
- Paste your original text into the left box and your modified text into the right box.
- The differences will automatically highlight directly behind your text in real-time.
- Use the 'Compare Level' dropdown to switch between Word, Character, or Line comparisons.
- Use the 'Ignore Case' or 'Ignore Whitespace' toggles to reduce noise.
Key Features & Benefits
- Granular Precision: Choose between Character, Word, or Line level comparisons. Character-level diffing is perfect for catching minor typos that get lost in standard tools.
- Live Editor Highlights: Unlike other tools that make you compare text in a separate viewer below, LensText highlights differences directly in the editor as you type.
- 100% Private & Secure: Your confidential code and sensitive documents never leave your computer. The diffing algorithm runs entirely in your web browser.
- Smart Filters: Easily ignore whitespace changes, newlines, and case differences to focus on the actual content modifications.
Frequently Asked Questions
What is a 'Diff'?
Diff is a data comparison utility that outputs the differences between two files or text blocks. It shows exactly what was added, removed, or changed.
Why is Character-level comparison useful?
Most text comparison tools only look at whole words or lines. If you change 'receive' to 'recieve', a word-level tool highlights the whole word. A character-level tool highlights just the exact transposed letters, making edits instantly obvious.
Is there a limit to how much text I can compare?
Because processing happens on your device, the only limit is your computer's memory. Most modern browsers can easily diff hundreds of pages instantly.