DevTilt

Diff Checker

Find line-level differences between two text inputs. The diff library loads only when you compare — nothing is uploaded to a server.

Result

Diff

Paste original and modified text, then Compare. Additions and deletions are highlighted.

How to compare text diffs

  1. Paste original text on the left and modified text on the right.
  2. Click Compare (the diff library loads the first time).
  3. Additions highlight in green; deletions in red.
  4. Copy the unified diff, or open Text Compare for a side-by-side view.

What is Diff Checker?

When two versions of a config, log snippet, or code block should be identical but something changed, a visual diff shows exactly which lines differ. Paste both texts side by side to see added, removed, and unchanged lines highlighted — faster than reading two copies manually.

Why use DevTilt's Diff Checker?

  • Side-by-side diff with added/removed line highlighting
  • Line-by-line comparison algorithm
  • Handles multi-line text of any length
  • No file upload required — paste both inputs

Common use cases

  • Comparing two versions of a JSON config before deployment
  • Finding what changed between two API response snapshots
  • Reviewing edits to a legal text or policy document
  • Debugging why two supposedly identical log entries differ

FAQ

Yes. Both texts stay in your browser. DevTilt does not upload your input for diffing.
The jsdiff library downloads the first time you click Compare on this page or Text Compare. Case Converter does not load it.
The tool reports that the texts match. No added or removed highlights are shown.
Yes. Comparing empty against non-empty text shows the entire second input as additions (or the first as deletions).
Windows CRLF and Unix LF are compared as-is. If a diff looks wrong, check whether one side used different newline styles from copy-paste.