Text Diff Checker
Compare two texts, line by line
+2 added−2 removed2 unchanged
11The quick brown fox
2−jumps over the lazy dog.
2+leaps over the lazy dog.
33Line three stays the same.
4−This line gets removed.
4+A brand new line appears.
Related tools
More browser-only tools, free and no upload.
Color Converter
HEX / RGB / HSL + contrast check
Word Counter
Words, chars, reading time, density
Number Base Converter
Binary / octal / dec / hex / any base
Base64 Encode / Decode
Text ↔ Base64, UTF-8 safe
QR Code Generator
URL / WiFi / vCard → PNG or SVG
Slug Generator
Text → clean URL slug
HTML Entity Encoder / Decoder
HTML entities encode & decode
Prompt Template Manager
Reusable {{variable}} prompts + token count
Questions
- Is Text Diff Checker free?
- Yes. Text Diff Checker is completely free, with no account, no sign-up, and no usage limits. It runs entirely in your browser.
- Do my files get uploaded when I use Text Diff Checker?
- No. Text Diff Checker processes everything on your device, so your files and text never leave your browser. You can verify it yourself: open your browser's Network tab and you'll see no uploads.
- How do I use Text Diff Checker?
- Open Text Diff Checker in your browser, no install or sign-up needed, then paste, type, or drop in your input and the result appears instantly. Compare two blocks of text and see line-by-line additions and removals, side-by-side with line numbers. LCS-based diff, ignore-case and ignore-whitespace options, live add/remove counts. Browser-only.
- Is there a file size limit in Text Diff Checker?
- There's no hard file or text size limit. Because Text Diff Checker runs locally in your browser, the only ceiling is your device's available memory, and everyday files process instantly.