How to use: Text Diff Checker
Text Diff Checker is a free online Text Tools tool that compare two texts line by line and highlight additions and deletions instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Compare two texts line by line and highlight additions and deletions.
- Text Tools
- Because everything is computed client-side, Text Diff Checker is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Text Diff Checker takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
Paste second version on the right.
Input
Line one Line two Line three
Output
<span class="diff-ctx"> Line one</span><span class="diff-ctx"> Line two</span><span class="diff-ctx"> Line three</span>
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Text Diff Checker helps:
- Compare two texts line by line and highlight additions and deletions.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is Text Diff Checker?
Text Diff Checker compare two texts line by line and highlight additions and deletions. It runs entirely in your browser, so your data stays private.
Is Text Diff Checker free to use?
Yes. Text Diff Checker is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- The result does not update while you type — press Run after changing the input.
- This tool takes two inputs; both must be filled for a meaningful result.
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.