CodeASystem developer tools
Compare code & text, side by side.
Inspect code modifications, compare configuration files, review text revisions, and generate unified patches with total privacy.
Code & Text Diff Viewer
Compare two blocks of text or code side-by-side with line and word level diff highlights.
Original Text (Before)
Modified Text (After)
Diff Results:+0 added-0 removed
Processing happens entirely inside your browser. No documents or code snippets are uploaded to any server.
How it works
Browser-native LCS diff algorithm. Zero telemetry.
Diff computations run in memory using the Myers Longest Common Subsequence (LCS) algorithm. Proprietary source code, sensitive configurations, and internal drafts never touch a server.