How to Use Text Diff Checker

Step 1: Paste Original & New Text
Enter original version on the left and modified version on the right.
Step 2: Inspect Diff
Added lines highlight in green, removed lines in red.
Step 3: Switch Views
Toggle between Split Side-by-Side and Unified views.

Key Features & Capabilities

Fast Myers diff algorithm powered by jsdiff
Side-by-side and unified comparison modes
Line number synchronization and difference count summary

Specifications & Limits

Supported Formats: .txt, .md, .json, .js, .html
Max File Size: 10 MB
Batch Processing: Single Item
Free Tier Limit: Side-by-side and unified diff views

Frequently Asked Questions

What is the difference between a split diff and a unified diff?

A split diff shows the original and revised files in separate side-by-side columns. A unified diff combines the changes into a single chronological stream using plus and minus indicators.

Why does a line show as changed when the words look identical?

Hidden characters such as trailing spaces, different line-ending styles (CRLF vs. LF), or non-breaking spaces can cause a line to register as different.

Can I compare structured files such as JSON or code?

Yes. Diff checkers work on any plain text content, including source code, Markdown, HTML, and JSON.

Is my comparison text sent to an external server?

PixelToFile processes text diffs directly in your browser using client-side JavaScript, so your text is not uploaded to external servers.

Related Tools

Compare PDF — Compare two PDF files side by side and highlight visual and textual differences.
Word & Character Counter — Calculate real-time word count, character count, sentence count, and reading time.
Text Cleaner & Formatter — Strip extra whitespace, remove HTML tags, deduplicate lines, and format text.