Use the free QuickToolz text tools — no signup, no install, works in your browser.
How to Use Text Diff Checker
Step 1
Paste original text
Step 2
Paste new text
Step 3
Click Compare
Step 4
View differences
What Is a Text Diff Checker?
A text diff checker compares two versions of text and highlights the differences between them. Added content appears in green, removed content appears in red, and unchanged text stays neutral. It’s the same technology used by developers in version control systems like Git, now available as a simple web tool for everyone.
How to Compare Two Texts Online
- Paste your original text in the left input box.
- Paste your new or edited text in the right input box.
- Click Compare to run the diff analysis.
- View the highlighted differences — additions in green, deletions in red.
When Do You Need a Text Diff Checker?
Text diff tools are used in many professional situations. Editors compare drafts to track changes between versions. Legal teams compare contract revisions to spot altered clauses. Developers compare configuration files to identify what changed between versions. Writers compare their draft with an edited version to review every change their editor made.
Understanding Diff Results
A diff result shows you exactly what changed at the character, word, or line level. Line-level diffs show which full lines were added or removed — useful for code and structured data. Word-level diffs highlight individual words that changed — better for prose. Character-level diffs catch even small spelling changes.
Tips for Getting Accurate Results
Make sure both texts use the same line endings and encoding before comparing. Extra whitespace at the end of lines can generate false positives. If you’re comparing code, preserve indentation exactly. For documents pasted from Word, plain-text both versions first to avoid hidden formatting characters.
Frequently Asked Questions
Is there a size limit on texts I can compare? No — you can compare large documents without any limit.
Does the tool save my text? No — all processing happens in your browser. Nothing is sent to a server.
Can I compare code files? Yes — the text diff checker works on any plain text including code, CSV, JSON, and more.