⇔ Text Compare

Compare plain text or JSON side by side—highlight added, removed, and changed lines with inline diff.

Free Instant results No sign-up needed
0 lines 0 added 0 removed 0 modified
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Original
Ln 1, Col 1 0 lines
0 chars TEXT
Changed
Ln 1, Col 1 0 lines
0 chars TEXT

Two CodeMirror panes, a Compare button, and a diff view that colours removed lines on the left and added lines on the right. Inline character changes get a third highlight. JSON pasted into either side may auto-format for readability, but the diff itself is plain text—it does not validate JSON.

Buttons you will actually click

  • Compare — swap editors for the split diff view with add/remove/change counts.
  • Previous diff / Next diff — jump between change hunks.
  • Edit again — return to the twin editors.
  • Copy left / Copy right, Swap, Clear — housekeeping without leaving the page.

JSON vs plain text

For API bodies or config files, paste old and new JSON side by side. If the paste looks like JSON, the lab may pretty-print it before you diff. Syntax errors are not diagnosed here—use the JSON Formatter when you need JSON.parse validation first.

What this is not

  • Not a plagiarism or web search tool—only the two strings you supply are compared.
  • Not Git: no file names, branches, or three-way merges.
  • Not a semantic JSON diff of object keys—ordering and whitespace changes show as text edits.

Processing

Diffing runs in the browser via JavaScript loaded with the page. Your text is not posted to Nexora for comparison.

Diff questions

What is a text diff?

A text diff is a comparison that highlights where two pieces of text differ, including added, removed, and changed lines or characters.

How does text comparison work?

The tool compares the original text with the modified text, aligns matching and changed lines, and highlights the visible differences in the browser.

Can I compare JSON online?

Yes. Paste two JSON documents or API responses into the left and right editors, then click Compare. If the pasted content looks like JSON, the editor may auto-format it for easier reading before you diff.

Is this a JSON checker or validator?

No. This tool shows differences between two inputs you provide. To validate JSON syntax or catch parse errors, use the JSON Formatter tool instead.

What is JSON diff?

JSON diff is a side-by-side comparison of two JSON versions that highlights added, removed, and changed keys, values, or lines. This page treats JSON as text and highlights those changes in the browser.

Can I compare two short words or phrases?

Yes. The same side-by-side diff works for a few words as well as long documents or code snippets.

Can I compare code?

Yes. You can paste code snippets or configuration files, but this tool is a general text diff rather than a full source-control review system.

Can I compare long text?

You can compare longer text, though very large inputs depend on browser memory and the loaded diff library.

Does the tool store my text?

The comparison happens in the browser UI. The page loads a diff library from a CDN, and the app does not send your pasted text to our servers.

Related Developer

If you need a neighbouring step in the same workflow, these pages are the closest match: JSON Formatter, Regex Tester, HTML/CSS/JS Minifier. Browse the full Developer set or the all tools hub.