Text Diff Checker
This checker makes small text revisions easier to inspect by comparing two versions in the browser and labeling changed lines instead of asking you to scan both documents manually.
Compare two text versions line by line
Paste an original and revised version to see added, removed, and unchanged lines.
Processing mode: browser-only for this tool. The interface does not require a server upload to perform its transformation.
Start with a focused browser tool
This checker makes small text revisions easier to inspect by comparing two versions in the browser and labeling changed lines instead of asking you to scan both documents manually.
Designed for: Editors, developers, QA testers, and documentation teams reviewing small revisions.
How to use this tool
Paste the earlier version on the left and the revised version on the right. Compare reports lines that are unchanged, added, removed, or changed by position. Use short, representative inputs for the clearest review.
How the result is produced
The browser splits each input into lines and performs a simple dynamic-programming longest-common-subsequence comparison. It is designed for readable review, not a full patch-format implementation.
Test examples
Original: “status: draft” and revised: “status: published” are shown as a removed line and an added line. An added paragraph appears as an added line in the revised column.
Limitations
The comparison is line-oriented and may report a whole line as changed when only one word differs. It does not understand programming-language syntax, images, binary files, or collaborative merge conflicts.
Privacy and processing
Both text versions stay in the browser while the comparison runs. The tool does not upload them to a Nofyi processing endpoint.
Related guide
How to review text changes without trusting a diff blindly
Related tools in this category
Documentation
This page describes the implementation shipped with the NOFYI Tool Factory. Review the interface output before using it in a production workflow.