How to Compare Two Texts Side by Side
Find the differences between two texts with our diff checker. Highlights additions, deletions, and changes.. This step-by-step guide walks you through the process using LevnTools Text Diff, a free browser-based tool that handles everything locally on your device. No software to install, no account to create, and no files uploaded to external servers. Follow these steps to complete the task in under a minute — updated for 2026.
Paste the original text
Paste the first version of the text into the left input area. This is treated as the "original" or "before" version for comparison purposes.
Paste the modified text
Paste the second version into the right input area. This is the "modified" or "after" version. The tool will compare the two and highlight every difference.
Review the differences
The tool highlights additions in green, deletions in red, and modifications in yellow. You can switch between side-by-side and inline diff views. A summary shows the total number of changes.
Export the diff
Copy the diff output or download it as a text file. The report shows exactly what changed between the two versions.
Pro Tips
- Use the inline view for small changes and side-by-side view for larger rewrites.
- This tool is useful for comparing code versions, contract revisions, and essay drafts.
- If you only care about content changes, ignore whitespace differences using the toggle option.
Common Issues & Fixes
Issue: The entire text is highlighted as different.
Fix: Check for invisible characters, different line endings (Windows vs. Mac/Linux), or encoding differences between the two texts.
Issue: Minor formatting changes are distracting from real content changes.
Fix: Enable "ignore whitespace" and "ignore case" options to focus on meaningful content differences.
Step-by-Step: How to Compare Two Texts Side by Side
Complete this task using LevnTools Text Diff by following each step below. Every step runs in your browser with zero server interaction.
Step 1: Paste the original text
Paste the first version of the text into the left input area. This is treated as the "original" or "before" version for comparison purposes. Text Diff handles this step entirely in your browser, so your text files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 2: Paste the modified text
Paste the second version into the right input area. This is the "modified" or "after" version. The tool will compare the two and highlight every difference. Text Diff handles this step entirely in your browser, so your text files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 3: Review the differences
The tool highlights additions in green, deletions in red, and modifications in yellow. You can switch between side-by-side and inline diff views. A summary shows the total number of changes. Text Diff handles this step entirely in your browser, so your text files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 4: Export the diff
Copy the diff output or download it as a text file. The report shows exactly what changed between the two versions. Text Diff handles this step entirely in your browser, so your text files remain private throughout. Once this step completes, your result is ready to download and use immediately.
Tips for Better Results with Text Diff
Getting the best output from Text Diff comes down to a few practical tips. Use the inline view for small changes and side-by-side view for larger rewrites.. This tool is useful for comparing code versions, contract revisions, and essay drafts.. If you only care about content changes, ignore whitespace differences using the toggle option.. Following these recommendations ensures consistent, high-quality results every time you use Text Diff.
Common Issues and Fixes
If you run into problems while using Text Diff, these are the most common issues and their solutions. Issue: The entire text is highlighted as different.. Fix: Check for invisible characters, different line endings (Windows vs. Mac/Linux), or encoding differences between the two texts.. Issue: Minor formatting changes are distracting from real content changes.. Fix: Enable "ignore whitespace" and "ignore case" options to focus on meaningful content differences.. If none of these solutions resolve your problem, try clearing your browser cache and reloading Text Diff.
Frequently Asked Questions
Open LevnTools Text Diff in your browser and follow the 4-step process outlined in this guide. Start by paste the original text, then the entire process takes under a minute. No account or download is required.
LevnTools Text Diff is the best free option for this task because it runs entirely in your browser with no file uploads, no account requirements, and no usage limits. For users who value privacy and cost, it is the top choice in 2026.
Yes, LevnTools Text Diff works on mobile browsers including Chrome for Android, Safari for iOS, and Firefox Mobile. The interface adapts to smaller screens, and all processing happens locally on your device regardless of whether you use a phone, tablet, or desktop computer.
No, LevnTools Text Diff runs entirely in your web browser. There is nothing to install, no plugins required, and no desktop application to download. Open the tool page, follow the steps in this guide, and download your result. It works on any modern browser across all operating systems.
Yes, using LevnTools Text Diff to compare two texts side by side is completely free. There are no premium features locked behind a paywall, no per-file charges, and no daily usage limits. The tool is and will remain free because all processing happens client-side, eliminating server costs.