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NotepadDrop

Text & File Diff Comparison

Paste text or drop files on both sides to compare line-by-line differences in real time.

Original Text / File ALeft Panel
Drop file here or
Modified Text / File BRight Panel
Drop file here or
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Learn how to use NotepadDrop’s Online Notepad and Text & File Diff Tool effectively with practical, straightforward guides.

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Frequently Asked Questions

How do I compare two texts online?

Paste or type your original text in the left panel and the modified text in the right panel. Click Compare to see line-by-line differences highlighted in real time.

Drag and drop files onto each panel, or click "Choose File" to select files from your device. The tool reads plain text files (TXT, CSV, JSON, code files, etc.) and compares their contents.

A text diff (difference) shows what changed between two versions. Added lines are highlighted in green, removed lines in red, and modified lines in amber. Unchanged lines remain neutral.

Added lines (green +) exist only in the modified version. Removed lines (red -) exist only in the original. Modified lines (amber ~) appear in both but with changes highlighted inline.

Yes. The tool works with any plain text format: source code (JS, TS, Python, etc.), configuration files, CSV, JSON, Markdown, logs, and more. Binary files are not supported.

No. All file reading and diff computation happens entirely in your browser using the FileReader API. Your files are never uploaded to our servers.

After comparing, click "Copy Differences" to copy a formatted diff summary to your clipboard, or "Download Report" to save a detailed text report with file names, timestamps, and full diff output.

Yes. NotepadDrop is completely free with no usage limits, no premium tier, and no hidden costs. All features are available without payment.