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Code tool

Code Token Diff

Compare two C-like code snippets after comment removal and whitespace-insensitive tokenization, with a bounded token-level diff that runs locally.

In-browser processingNo account requiredPrivacy details ↗

A QUICK WALKTHROUGH

How to use this tool

  1. Paste the earlier and later snippets.
  2. Compare their normalized token streams.
  3. Review added and removed tokens, or confirm that the normalized streams match.

Token comparison, not semantic proof

This tool compares lexical tokens with a longest-common-subsequence diff. It does not parse an AST, execute code, resolve names, or prove equivalent behavior.

Supported comment rules

The scanner recognizes // and /* */ comments outside single, double, and backtick strings. It is intended for C-like syntax; regex literals, template interpolation, and language-specific comment forms can be ambiguous.

Local bounded processing

Each snippet is limited to 60,000 characters and 4,000 tokens, with at most 2,000,000 token pairs. Text stays in this browser.

GOOD TO KNOW

Common questions

Does it understand code semantics?

No. “Token diff” is the precise scope. Reordered statements, renamed variables, macros, and equivalent expressions can still appear different.

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