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.
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.
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