inicio/text/diff

Text Diff Tool Online

Compare two texts side by side

Cómo usar Diferencia de Texto

  1. 1

    Paste original text

    Enter the original text in the left panel.

  2. 2

    Paste modified text

    Enter the modified version in the right panel.

  3. 3

    View differences

    Added, removed, and changed lines are highlighted automatically.

Preguntas frecuentes

Is my data safe?
Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.
Can I compare code files?
Yes. The diff tool works with any plain text including source code, configuration files, JSON, YAML, HTML, Markdown, and CSV. Paste the file contents directly into each panel.
How are differences displayed?
Added lines are highlighted in green, removed lines in red. Lines that exist in both versions but are unchanged are shown without highlighting. This follows the standard unified diff convention.
Does it handle very long documents?
Yes. The comparison runs entirely in your browser and can handle thousands of lines. Performance scales with the number of changes, not the total document size.
Can I compare files instead of pasting text?
Currently the tool requires pasting text. To compare file contents, open the file in a text editor, select all, and paste into the panel.

Saber más

¿Qué es Text Diff?

Compare two blocks of text side by side and see additions, deletions, and changes highlighted instantly. Useful for code reviews, tracking document revisions, spotting configuration changes, and verifying that edits were applied correctly. Works with any plain text including source code, JSON, YAML, HTML, and Markdown. All comparison happens locally in your browser — paste sensitive content without worry. No sign-up, no limits, no server uploads.

¿Por qué usar Text Diff?

  • Line-by-line highlighting — added lines, removed lines, and changed sections are color-coded for instant visual clarity.
  • Works with any plain text — source code, configuration files, documents, CSV data, or any text format.
  • Completely private — both text inputs stay in your browser. Compare confidential code or private documents safely.
  • No file upload needed — paste directly into the text panels for fast comparison.
  • Instantly accessible — no software to install, no account to create.

Casos de uso de Text Diff

Code review

Compare two versions of a function or file to review changes without a version control system. Paste the original and modified code side by side.

Document revision tracking

Compare a draft against the published version of a contract, policy document, or article to identify exactly what changed.

Configuration file comparison

Spot differences between production and development config files (JSON, YAML, .env) to debug environment-specific issues.

Data verification

Compare exported data before and after a database migration or transformation to confirm the output matches expectations.

Consejos y buenas prácticas

  • 💡For the most readable diff, compare text at the same logical level — for example, both formatted JSON rather than one formatted and one minified.
  • 💡Whitespace-only differences can clutter the diff view. If indentation varies between versions, normalize formatting first using the JSON Formatter or a code editor.
  • 💡The diff tool is line-based. If you are comparing prose where line breaks differ, you may get more meaningful results by using paragraph-level chunking.
  • 💡Use Ctrl+A to select all text in each panel quickly when replacing content for a new comparison.

Cómo funciona

The comparison algorithm uses a line-by-line diff based on the Myers diff algorithm, which finds the shortest edit script between two sequences. Additions are marked in green, deletions in red, and unchanged lines are shown without highlighting. The implementation runs entirely in the browser using JavaScript, with no server calls. For very long documents (thousands of lines), the diff may take a moment to compute — performance scales with the number of changed lines rather than total file size.

Más Herramientas de Texto

Contador de Palabras Conversor de Mayúsculas Ordenar y Deduplicar Vista Previa de Markdown Markdown a PDF