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Text Diff Viewer

Compare two text files side by side and instantly see exactly what was added, removed, or modified. The entire diff runs client‑side — your sensitive content never leaves your device. Download the highlighted differences as a portable HTML report.

🔒 Processing happens in your browser — files are never uploadedFree · No sign-up required

How to Use

  1. 1Upload two text files (or paste your text directly into the left and right panels).
  2. 2Click Compare to generate the line‑by‑line diff.
  3. 3Inspect the highlighted changes (green = added, red = removed) and click Download Diff to save the report.
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Why use ShowPro's Text Diff Viewer?

🔒
100% Private
Files never leave your browser. Zero server uploads.
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Instant Results
Processing happens locally — no waiting for uploads.
🆓
Completely Free
No account needed. Use 5 times per day, always free.

Frequently Asked Questions

What file types can I compare?

Any plain‑text file works — .txt, .csv, .log, .md, source code (.js, .ts, .py, etc.), and even .html (as raw text).

Can I ignore whitespace and case?

Yes, the options panel lets you turn on “ignore whitespace” and “ignore case,” which treat differences in spacing or capitalization as irrelevant.

Is my data private?

Absolutely. The entire comparison is performed inside your browser; no text is ever sent to a server.

What if I only have one file and want to compare it against a previous version?

You can paste the old version into the left panel and upload the new version on the right — the tool treats both sources identically.