DUL Data Utility Labs

Text utilities - Private browser tool

Text Diff Checker

Compare two text blocks line by line in your browser for docs, configs, prompts, and data exports.

Use the tool Read FAQ 
id,name
1,Ada
---DIFF---
id,name
1,Ada Lovelace

Text Diff Checker

Private, browser-based, free to use.

What this tool helps you do

Compare two text blocks line by line in your browser for docs, configs, prompts, and data exports. Paste your data, run the tool, copy the result, and move on. The core workflow stays on one focused page.

Best use cases

  • Convert or clean data before importing it into spreadsheets, BI tools, databases, or internal apps.
  • Debug API payloads, logs, tokens, encodings, regular expressions, and text transformations.
  • Create lightweight examples for documentation, tests, tutorials, customer support, and team handoffs.

Related tools

Case ConverterJSON FormatterSQL FormatterRegex TesterUUID GeneratorTimestamp ConverterSlug GeneratorCase Converter

Text Diff Checker FAQ

How do I enter two texts?

Separate them with a line containing ---DIFF---.

What diff style is shown?

Added, removed, and unchanged lines are marked in plain text.

Does it store my text?

No. The comparison runs locally.