The Text Diff tool compares two blocks of text, code, or configuration files word-by-word or line-by-line, quickly identifying additions, deletions, and modifications. Ideal for comparing two commit versions during code review, investigating configuration file changes, proofreading wording differences between document revisions, and checking field-level changes in API response bodies across environments. All comparisons run locally in the browser; no content is ever uploaded.
Two pieces of text to compare. Enter the original version (Old) on the left and the modified version (New) on the right. Accepts JavaScript/TypeScript function bodies, JSON configuration objects, CSS style rules, Markdown document paragraphs, or any plain text content.
Diff results are displayed with color-coded highlighting: green background marks additions, red background with strikethrough marks removals, and uncolored sections represent unchanged content. Word-level mode captures changes at word granularity, suitable for copy editing. Line-level mode marks differences by entire lines, suitable for comparing code and configuration files.
The tool compares two text blocks using the selected mode. Word-level mode is best for wording changes, while line-level mode is better for code, configuration, and structured text. Input content stays local and is not uploaded. It only marks differences; it does not decide which version is correct.
Input example
// Original version (Old)
function greet(name) {
return "Hello, " + name;
}
// Modified version (New)
function greet(name, lang) {
if (lang === "zh") return "Nǐ hǎo, " + name;
return "Hello, " + name;
}Output example
Line diff results:
+ function greet(name, lang) {
+ if (lang === "zh") return "Nǐ hǎo, " + name;
return "Hello, " + name;
- }
+ }Yes. The text diff works well for small code snippets, configuration blocks, SQL queries, and API payloads. For a whole repository, use Git or your IDE, then use this page for focused review snippets.
Line diff highlights changed lines and is easier for structured files. Word diff highlights smaller text edits inside a sentence, making it better for copywriting, documentation, and translation review.
No. The comparison is performed in the browser session and is not saved by ToolOrbit. Avoid pasting secrets into any web tool unless your organization permits browser-based review.
Last updated 2026-06 · ToolOrbit Editorial Team