How does the string comparison tool work?

Our diff engine compares two strings line-by-line and character-by-character, highlighting added (green), removed (red), and changed (yellow) portions. It works entirely in your browser with no data sent to any server.

Can I use regex in Find & Replace?

Yes. Toggle the Regex switch in the Find & Replace tab to use full JavaScript regular expressions including capture groups for advanced replacements.

Is my text safe and private?

All processing happens locally in your browser using JavaScript. Your text is never uploaded or stored on any server.

What case formats does the case converter support?

The case converter supports UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case.

Free Text & String Tools – Compare, Convert, Diff, Encode

String Comparison & Diff

Ignore case Ignore whitespace

Original / Text A

Modified / Text B

Enter text in both boxes above, then click Compare →

Case Converter

Your Text

Word & Character Counter

Your Text

Find & Replace

Find

Replace with

Use Regex Case Sensitive Replace All

Input Text

Result

Result will appear here…

Reverse Text

Input

Result

Result will appear here…

Sort Lines

Input (one item per line)

Case-insensitive sort

Sorted Result

Result will appear here…

Duplicate Line Remover

Input (one item per line)

Cleaned Result

Result will appear here…

Text Encode / Decode

Input

Result

Result will appear here…

Whitespace Cleaner

Input

Cleaned Result

Result will appear here…

Text Hash Generator

Input Text

Uses the browser's built-in SubtleCrypto API. Nothing is sent to any server.

Free Online String Comparison Tool

Usely's string comparison tool uses a line-by-line diff algorithm to highlight exactly what changed between two blocks of text. It's perfect for comparing code snippets, contract drafts, config files, or any plain-text content. Added lines appear in green, removed lines in red, and changed lines in yellow — just like a professional Git diff.

All comparison happens locally in your browser. Your text is never sent to a server, making it safe for sensitive or confidential content.

Why use a Case Converter?

Developers, writers and content creators regularly need to switch between text case formats. Whether you need camelCase for JavaScript variables, snake_case for Python, kebab-case for CSS class names, or PascalCase for TypeScript components — our converter handles all 8 formats instantly.

Frequently Asked Questions

How does the string diff algorithm work?

The tool compares your two texts line by line. For each line pair it performs a character-level comparison to classify it as Added (only in B), Removed (only in A), Changed (exists in both but different), or Same. This gives you an intuitive visual diff similar to tools like GitHub or VS Code's diff editor.

Can I use regex in the Find & Replace tool?

Yes. Enable the "Use Regex" toggle and the Find field accepts full JavaScript regular expressions, including capture groups like $1 in the Replace field for advanced substitutions.

Is my text safe? Is it uploaded anywhere?

All 10 tools on this page process text entirely in your browser using JavaScript. No text is ever uploaded, stored, or transmitted to any server. It is completely private and safe to use with confidential data.

What hash algorithms are supported?

The hash generator uses the browser's native SubtleCrypto API to produce SHA-1, SHA-256, SHA-384, and SHA-512 digests. Note that SHA-1 is provided for compatibility only and should not be used for security purposes.

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