Question 1

How does the diff checker work?

Accepted Answer

Formly uses the Longest Common Subsequence (LCS) algorithm to find the differences between two texts. It highlights additions in green and deletions in red, line by line.

Question 2

Can I compare code files?

Accepted Answer

Yes — paste code from any language into both panels. The diff checker works on any plain text, including source code, JSON, markdown, and configuration files.

Question 3

What does 'copy as patch' do?

Accepted Answer

Copying as patch gives you a unified diff format (like what git shows) that can be applied with the 'patch' command or viewed in diff-aware tools.

Question 4

Is there a size limit?

Accepted Answer

No — the diff checker works with text of any length in the browser without sending data to servers.

Diff Checker