⇄ Text & Code Diff Checker

Compare two files or code snippets and view differences highlighted line by line. Supports unified and split-view modes. Free online diff checker — no signup, works in browser.

Original Upload file

Modified Upload file

How to Use

Paste or upload texts

Enter your two texts in the left and right panels. Use the upload button to load files directly.

Choose view mode

Switch between Split view (side by side) and Inline view (unified diff) using the toggle.

Review the changes

Green lines were added, red lines were removed. Changed lines show word-level highlights inside.

Frequently Asked Questions

What is the difference between inline and split view? +

Split view shows the two texts side by side, with additions highlighted green on the right and deletions in red on the left. Inline view shows both in a single column — red lines were removed, green lines were added. Split is better for reading context; inline is better for seeing exactly what changed.

Can I upload files to compare? +

Yes — click "Upload File" above each panel to load any text or code file. Common formats include .txt, .js, .ts, .py, .json, .html, .css, .md, .yaml, and more. Files are read locally and never uploaded to a server.

Does this highlight word-level changes? +

Yes — for lines that are similar but changed, the tool highlights the specific words or characters that differ within the line (shown with a darker background). This helps identify small changes in long lines.

Is there a size limit for comparison? +

There is no hard limit, but comparisons of very large files (10,000+ lines) may be slow since everything runs in your browser. For very large codebases, a dedicated diff tool like git diff is recommended.

Is my content sent to a server? +

No. The entire comparison runs in JavaScript in your browser. Your text and files never leave your device.

Guía: Comparador de Código (Diff)

¿Qué es?

Compara dos versiones de código o texto y resalta las diferencias línea por línea: adiciones (verde), eliminaciones (rojo) y contexto sin cambios. Esencial para code reviews, revisar cambios antes de commit y entender qué cambió entre versiones.

Cómo usar

Pega el texto original en el panel izquierdo.
Pega el texto modificado en el panel derecho.
Las diferencias se muestran en tiempo real.

Consejos

Para archivos, git diff da más contexto con historial Git.
Normaliza espacios/tabs antes de comparar para evitar falsos positivos.
Formatea JSON antes de diffear para mejor legibilidad.