Compare text, code, JSON, XML, YAML, Markdown, SQL, and config changes in a polished side-by-side diff workspace.
Paste two versions, review highlighted changes, then copy or export the result.
Compare two versions of text online and instantly see added, removed, and modified content with smart format detection, word-level prose diffs, line-level code diffs, filters, search, copy, and export options.
Paste two versions and get a highlighted diff immediately without setup or sign-in.
Designed for code snippets, API payloads, config files, SQL queries, logs, and docs.
Use prose-friendly word diffs for text and structured line diffs for technical formats.
Everything runs in the browser, keeping private comparison content on your device.
Use the sample payload to test JSON comparison, pretty-printing, added fields, modified values, and export behavior. It mirrors common API and configuration review tasks.
Original:
{
"plan": "starter",
"limits": {
"requests": 1000
}
}
Modified:
{
"plan": "pro",
"limits": {
"requests": 10000
},
"region": "us-east-1"
}A diff checker is an online comparison tool that takes two pieces of content and marks the differences between them. It shows additions, removals, and modifications so developers, QA testers, technical writers, and product teams can verify what changed before committing code, deploying configuration, or publishing content.
Manual comparison is slow and easy to misread, especially when whitespace, nested JSON, long logs, or one-word content edits are involved. This tool turns those changes into highlighted output with format-aware views, search, filters, copy actions, and export formats built for real review workflows.
Add the old version, baseline response, previous config, or original draft to the left editor.
Add the changed version to the right editor. The tool detects the likely format automatically.
Use filters, search, view modes, copy, or export to inspect and share the result.
Built for common developer, QA, writing, and operations comparison tasks, with practical controls available directly in the result toolbar.
Paste an original and modified version into two synchronized editors, then inspect changes in a clear comparison workspace.
Automatically detects plain text, JSON, YAML, XML, Markdown, SQL, and code so the output can use the most readable diff mode.
Switch between unified, split, and inline layouts for structured content, depending on whether you need compact review or precise side-by-side scanning.
Search inside the diff and filter by all, added, removed, or modified changes to quickly isolate the lines that matter.
Export comparison output as `.patch`, `.diff`, or `.html`, or copy a readable diff summary straight to your clipboard.
Your input stays local in the browser, useful for credentials-free snippets, release notes, logs, API payloads, and config reviews.
Word-level highlighting for paragraphs, notes, and document edits.
Pretty-prints valid JSON before comparing nested keys and values.
Line-oriented output for snippets, functions, scripts, and config changes.
Save review output as patch, diff, or HTML.
Paste your two text versions. The tool automatically detects plain text, JSON, YAML, SQL, XML, or Markdown, selecting the best diff renderer.
Our engine executes a client-side Longest Common Subsequence (LCS) comparison to determine exact line insertions, deletions, and modifications.
Removals are marked in red, additions in green. Prose gets word-level highlights while code structures get inline changes highlighted.
Runs 100% locally in your browser. Sensitive environment configs, database scripts, and code never reach a server.
No command-line utilities, no git repositories needed. Paste, inspect, copy results in seconds.
Instantly filter changes or search using up/down arrow hotkeys to zoom into modified configurations.
Directly download standard Git-compatible .patch, .diff, or clean visual HTML layouts for sharing.
A focused, distraction-free environment that prioritizes your text comparisons. No interstitial popups or annoying sidebars.
Instantly swap inputs, copy highlighted differences to your clipboard, reset workspace panels, or export outputs in one click.
Review code diffs on the go. The layout scales smoothly from wide desktop monitors down to mobile and tablet screen viewports.
Custom workspace capabilities optimized for engineering, quality control, and infrastructure workflows.
Answers about online text comparison, privacy, supported formats, views, and exports.
A diff checker compares two versions of text and highlights what was added, removed, or changed. It is commonly used for reviewing code snippets, API responses, config files, documentation drafts, logs, and structured data.
When using a visual diff checker to compare source code or configuration files, choosing the right layout is crucial. A Split view comparison provides a clear side-by-side display of two files, which makes scanning added fields or aligned edits straightforward. A Unified diff format compiles all differences into a single, continuous stream of lines, similar to standard Git pull requests or patch outputs. For nested configuration updates or minor edits, an Inline difference view displays insertions immediately below removals in-place, keeping the file structure clean and compact.
Security is paramount when comparing environment variables, configuration files (like YAML, JSON, or XML), or private API responses. Unlike tools that upload your text to server backends, this secure text diff checker processes everything locally in your browser. This client-side execution prevents accidental data leakage of credentials, passwords, database settings, or proprietary code snippets. Feel confident using our private text comparison tool to inspect logs, credentials-free config files, and release notes safely on your own machine.
Once you identify the differences, sharing them with your team or saving a record is easy. The tool functions as a visual diff exporter, letting you download results in three formats:
Different content types require different comparison logic. For developer tasks, our JSON diff checker pretty-prints nested JSON payloads before comparison to prevent format-related diff noise. For prose, markdown, or text documents, a standard line-by-line code difference tool can fragment paragraphs. This is why our tool provides a specialized word-level prose diff view, flowing text naturally while highlighting specific added or deleted words in-line, offering a much more intuitive editing and proofreading experience.
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