Online Text Diff Checker: Compare Two Documents Instantly
Compare two text files and highlight the differences. Detect changes in words, characters, or lines instantly.
The Secure and Free Online Text Diff Checker
Our **online text diff checker** is the fastest way to **compare two documents** or code snippets, highlighting every modification instantly. Built for developers, writers, and editors, this **free text comparison tool** uses advanced algorithms to visually differentiate additions and deletions in **words, characters, or lines**. The privacy of your data is guaranteed, as the entire comparison process runs locally in your web browser, ensuring your content is never sent to a server.
Easily detect hard-to-spot typos in documents, track changes between versions of a paper, or verify updates in configuration files. Use the 'Lines' mode for clean code comparisons and the 'Characters' mode for meticulous typo-checking. Need to analyze the text you're comparing? Use our related Word Counter tool for deep analysis before you compare text.
Quick Guide: Compare Text and Find Differences
- Paste Text: Paste the initial version of your text on the left and the new, edited version on the right.
- Select Mode: Choose the comparison mode: **Words** (for general content), **Characters** (for code/typos), or **Lines** (for file changes).
- Execute: Click the "Find Difference" button.
- Review Result: Review the highlighted output: Red (
Removed) indicates deleted text, and Green (Added) indicates new text.
Frequently Asked Questions
Our Text Diff Checker tool uses the advanced jsdiff library to perform a side-by-side comparison. It highlights added text in green and deleted text in red, making it easy to instantly visualize specific edits, code changes, or document revisions between the two versions you provide.
Yes, absolutely. The text comparison process is performed entirely client-side using JavaScript within your web browser. Your original and modified text content is never uploaded to our servers, ensuring complete privacy and security for your code or documents.
Choosing the correct comparison mode is crucial. 'Words' is best for standard articles and documents. 'Characters' is ideal for detecting minor typos or variable changes in code. 'Lines' is specifically used for comparing code blocks, logs, or configuration files where identifying moved or changed lines is necessary.