Q.Is my text sent to a server for processing?
No. Our Diff Checker runs entirely client-side using JavaScript. Your text never leaves your browser, ensuring complete privacy.
Diff Engine
Text Diff Checker
Free online text compare tool. Quickly find the differences between two text documents. Highlight additions and deletions instantly.
Compare Text
Enter text above to see the difference...
Green Highlights
Text highlighted in green indicates additions. This is content that exists in the Modified Text, but was not present in the Original Text.
Red Highlights
Text highlighted in red with a strikethrough indicates deletions. This is content that was present in the Original Text but removed in the Modified Text.
Advanced Diff Algorithm Engine
Pinpoint exactly what changed between two documents in milliseconds. Our granular diff engine visualizes modifications at the character, word, or line level.
Granular Tracking
Toggle between checking character differences for typos, or line differences for source code comparisons.
Secure Client Parsing
Your documents, contracts, and essays are analyzed entirely within your browser. 100% private.
Color-Coded Analysis
Instant visual feedback. Additions are marked in green, deletions in red for immediate comprehension.
Diff View
The quick brownred fox jumps.
1 Addition
1 Deletion
How to Compare Texts
Spotting subtle changes is easy. Just follow these simple steps to compare your documents.
1
Paste Contents
Paste your original document into the left text area, and the modified version into the right text area.
2
Select Mode
Choose how granular you want the diff to be. Compare by individual characters, whole words, or full lines.
3
Review Differences
Scroll through the results panel below. Green highlights show new text, and red strikethroughs show deleted text.
FAQs: Diff Checker
Common questions about text comparison and privacy.
Q.What is the difference between word and char modes?
Word mode groups changes by whole words (best for essays), whereas char mode detects differences down to a single letter or punctuation mark (best for code or typos).
Q.Can I compare code snippets?
Absolutely! For code snippets (HTML, CSS, JS), we highly recommend using the "Lines" comparison mode for accurate tracking.
Q.Why are some words struck through in red?
A red strikethrough means that word existed in the original text, but was removed or modified in the new version.
Stop Searching for Changes Manually
Reading through two similar documents to find a single changed word is frustrating and error-prone. Our visual Diff Checker automates the process instantly.
For Writers & Editors
Did an editor send back a revised version of your essay or article without turning on "Track Changes" in Word? Just paste your original draft and their new draft into our tool to immediately see every single edit they made.
For Programmers
When a block of code isn't working, comparing it against an older, working backup is the fastest way to debug. Use the "Lines" comparison mode to check CSS, HTML, or JavaScript snippets without needing to open heavy IDE software.
For Legal & Contracts
Never sign a contract without verifying the final copy matches the draft you originally agreed upon. Our text compare tool guarantees that no hidden clauses were added or critical terms deleted before you sign.
Granular Comparison Modes
Switch between three diff modes: Characters (perfect for catching small typos or spelling fixes), Words (best for general writing and essays), and Lines (ideal for source code and lists).