Text Difference
Text Difference
Comparison Type
Difference Summary
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Enter text in both inputs to see the differences highlighted
About Text Difference
This tool compares two texts and highlights the differences between them. You can choose to compare by character, word, sentence, or line.
Use it for comparing versions of documents, checking for plagiarism, identifying changes in code, or analyzing text revisions. All comparison happens in your browser, ensuring your text remains private.
Related Tools
What is a Text Difference Tool?
A text difference tool (also known as a diff tool) is a utility that compares two texts and highlights the differences between them. Our text difference tool is designed to make it easy to see what has changed between two versions of text, whether they're documents, code snippets, or any other text content.
The tool works by analyzing both texts and identifying additions (text that appears in the second text but not the first), deletions (text that appears in the first text but not the second), and unchanged text. These differences are displayed with clear visual highlighting: green for additions, red for deletions, and normal text for unchanged content.
What makes our text difference tool particularly powerful is its ability to compare text at different granularity levels: by character, word, sentence, or line. This flexibility allows you to focus on the specific type of changes you're interested in, from minor character edits to major structural differences. Additionally, the tool provides statistics about the differences, including the number of additions, deletions, and a similarity percentage to quantify how similar the texts are.
Common Uses for a Text Difference Tool
Document Version Comparison
Compare different versions of a document to track changes, revisions, or edits. This is particularly useful for collaborative writing, where multiple people might make changes to the same document, or for tracking the evolution of your own documents over time.
Code Review and Debugging
Software developers can use the text difference tool to compare different versions of code, identify what changes were made in a commit, or spot the differences between working and non-working code to aid in debugging problematic sections.
Plagiarism Detection
Educators and content creators can compare texts to check for plagiarism or unauthorized copying. The similarity percentage and highlighted differences make it easy to identify how much content has been borrowed or modified from an original source.
Contract and Legal Document Analysis
Legal professionals can compare different versions of contracts or legal documents to ensure all changes are properly tracked and understood. This helps prevent overlooking subtle but important modifications in complex documents.
Frequently Asked Questions
How does the text comparison tool work?
Our text difference tool works by analyzing both input texts and identifying what has been added, removed, or left unchanged. It uses advanced difference algorithms that can compare text at the character, word, sentence, or line level, depending on your selection. The tool then visually highlights these differences using color coding: green for additions, red for deletions, and normal text for unchanged content. The comparison is performed entirely in your browser, ensuring your text remains private and secure.
What's the difference between the various comparison modes?
The tool offers four different comparison modes, each analyzing text at a different granularity level: Character mode compares individual characters and is best for finding minor edits and typos. Word mode identifies changes at the word level and is good for general document comparison. Sentence mode focuses on sentence-level changes, which is useful for comparing prose where individual word changes might be less important than overall sentence structure. Line mode treats each line as a unit of comparison, which is especially useful for code or structured text where line breaks are meaningful.
Is my text secure when using this tool?
Yes, your text is completely secure when using our text difference tool. All processing happens entirely in your browser - no text is ever sent to our servers. This means that any sensitive or confidential information you compare remains private on your device. Additionally, we don't store any of the text you input, so there's no risk of your data being saved or accessed later. This makes our tool safe for comparing sensitive documents, code, or personal information.
How accurate is the similarity percentage?
The similarity percentage provides a quantitative measure of how similar the two texts are. It's calculated based on the proportion of unchanged content relative to the total content. For example, a similarity percentage of 90% means that approximately 90% of the content is shared between both texts. The accuracy of this measure depends on the comparison mode you're using. Character-level comparison will give the most precise similarity percentage, while word, sentence, or line comparisons provide more contextually meaningful measures of similarity. For most purposes, the word-level comparison offers a good balance of precision and contextual relevance.
Can I compare large texts with this tool?
Yes, our text difference tool can handle relatively large texts, though performance may vary based on your device and browser. For optimal performance, we recommend texts under 50,000 characters each, though many modern browsers can handle significantly larger comparisons. If you're comparing very large documents, you might find the line or sentence comparison modes perform better than character-level comparison. The tool also includes a fullscreen mode, which provides more space for viewing large text comparisons. For extremely large documents (hundreds of pages), you might consider breaking the comparison into smaller sections for best results.