# Text Diff Checker — Free, In Browser

Compare two texts and see line-by-line differences. 100% in your browser — free, no sign-up.

## What does a text diff do?

A diff compares two blocks of text and highlights exactly what changed — which lines were added, which were removed, and which stayed the same. Instead of re-reading both versions, you see the differences at a glance.

## How it works in your browser

Both texts are compared locally and the result is highlighted line by line, entirely on your device. Nothing is uploaded, so you can safely diff code, contracts, or any private text.

## When to use a diff

Spot what changed between two drafts of a document, compare two versions of a config or code snippet, check what someone edited, or confirm that a copy matches the original. It is faster and more reliable than scanning by eye.

## Reading the result

Removed lines (in the original but not the new text) and added lines (in the new text but not the original) are marked distinctly, while unchanged lines provide context. A line that was edited shows up as one removal plus one addition.

## How to

1. Paste the original text and the changed text — both stay in your browser.
2. Click Compare.
3. Review the highlighted added and removed lines.

## FAQ

**Is my text uploaded?**

No. Both texts are compared in your browser, so you can safely diff code, contracts, or private text.

**How are changes shown?**

Added and removed lines are highlighted distinctly, with unchanged lines for context. An edited line shows as one removal plus one addition.

**What can I compare?**

Any two blocks of text — drafts of a document, versions of a config or code snippet, or a copy against the original.

**Why use a diff instead of reading both?**

A diff pinpoints exactly what changed, which is faster and more reliable than scanning two versions by eye.

**Is it free?**

Yes, completely free — no sign-up and no watermark.

**Is my data private?**

Yes — this tool runs entirely in your browser. Your files and text are never uploaded.


## Related

- [Unix Timestamp Converter — Free](/dev/timestamp-converter)
- [UUID Generator (v4) — Free](/dev/uuid-generator)
- [URL Encode / Decode — Free](/dev/url-encode)
- [Hash Generator (SHA-256, SHA-1, SHA-512) — Free](/dev/hash-generator)
- [Base64 Encode / Decode — Free](/dev/base64)
- [JWT Decoder — Free, In Browser](/dev/jwt-decoder)
- [JSON Formatter & Validator — Free](/dev/json-formatter)