Contrast by Unifysy
100% Free Runs in Browser No Data Sent

An online document comparison tool for draft reviews

Compare document text, policy drafts, SOPs, contracts, and working copies online. Contrast helps you see every added, removed, and changed line before approval.

Text, code, JSON, configs — paste it in and see every difference highlighted. Your data never leaves your device.

Original
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Changed
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Paste your text above to get started

Or to see Contrast in action.

Designed for teams reviewing document revisions

Document reviews are often slowed down by version confusion and manual checking. Contrast gives teams a simple browser-based way to compare draft updates and review changes clearly before approval, sharing, or publication.

  • +Compare policy updates before sharing them with leadership or employees.
  • +Review contract wording changes with legal or procurement teams.
  • +Check revised SOPs, guidelines, benefit summaries, and HR documents.

Popular comparison pages

Jump to a focused page for the format or workflow you need to review most often.

Text Compare
Compare text, code, JSON, and document drafts online with a free browser-based diff checker. See added, removed, and changed content without uploading your data.
Compare Text Online
Compare text online with a fast side-by-side diff checker. Highlight added, removed, and changed words instantly without sending your text to a server.
Compare Two Files Online
Compare two files online with a private browser-based diff tool. Upload text-based files, review line changes, and export the result in seconds.
JSON Diff Checker
Compare JSON online with a free JSON diff checker. Normalize formatting, spot changed keys and values, and review API payload differences in your browser.

Private by default

The comparison runs in your browser, which keeps drafts, configs, and internal data on your device.

Made for revision-heavy work

Switch between split and unified diff views, hide unchanged lines, and focus on the edits that matter.

Useful for both business and technical teams

Compare text, files, code, exports, and structured data in one place without extra tooling.

How to use this document comparison tool

  1. 1Paste the original content or upload the first file.
  2. 2Paste the revised content or upload the updated file.
  3. 3Choose options like JSON normalization, whitespace rules, or character-level diff when needed.
  4. 4Run the comparison and review the highlighted additions, removals, and changed lines.

Formats teams compare with Contrast

Contrast works well for common text-heavy workflows and structured data review. These are the formats most relevant to this page.

Policy draftsContractsSOPsGuidelinesMarkdown docsText exports

You can also upload text-based files such as TXT, Markdown, JSON, CSV, XML, HTML, CSS, JavaScript, TypeScript, YAML, and SQL.

Document Comparison Tool FAQ

Can I use Contrast as a document comparison tool?

Yes. It works well for text-based document drafts, policy updates, SOPs, contracts, and other revision-heavy content.

Is this good for policy and HR document reviews?

Yes. Contrast is especially useful when you need to compare benefit guides, offer letters, policy revisions, and employee communications.

Can I hide unchanged paragraphs or lines?

Yes. Contrast includes an option to hide unchanged lines so reviewers can focus on what actually changed.

Does Contrast keep document content private?

Yes. The tool runs locally in the browser, so document content stays on the device being used.