How to use Text Diff

Compare original and changed text line by line in a side-by-side workspace.

1. Paste, type, or drag and drop a supported text file into the input area.
2. Place the second value in the adjacent panel. Sensitive fields are masked by default.
3. Choose the options that match your intended result.
4. Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.

Use “Swap inputs” to reverse the comparison without copying either value.

What the result means

A readable line diff where − removes and + adds.

Privacy and safety

This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.

Limitations

• Comparison is capped at 750 lines per side to bound browser work.

Try the included example

Select “Load example” at any time to restore this tested sample.

Added search
Fixed export
Updated docs

Added fast search
Fixed export
Updated docs
Added offline mode