Free, browser-based utilities for everyday developer workflows

Side-by-Side Text Diff

Compare two versions of text or code. See lines that are unchanged, added, removed or changed, with optional word-level highlighting inside modified lines.

Use cases

Diff two text files

Explore more in the Use cases library.

  • Compare two texts or code files side-by-side.
  • See added/removed/changed lines and unified diff.
  • Ideal for reviews and config changes.
Tip: Ctrl + Enter to compare
Compare text or code

Paste the original on the left and the modified on the right.

Left (Original)

(0 lines)

Right (Modified)

(0 lines)
Diff results

No comparison yet. Paste text on both sides and click Compare text.

Unchanged Added (+) Removed (-) Changed
Unified diff (copy/export)
Left (Original) Right (Modified)

How to use Text Diff & Compare

Paste the original text into the left editor and the modified text into the right editor, then click Compare. Changed, added, and removed lines are highlighted in colour-coded blocks so you can review every difference at a glance.

Common use cases

Developers use this to compare config file versions, documentation revisions, and code snippets outside of a version control system. QA engineers use it to compare expected versus actual output in test runs, and technical writers use it to review document edits during collaboration.

Why run this in your browser?

All processing happens locally in your browser. Your data never leaves your machine, making it safe for sensitive payloads, internal API responses, and confidential configurations.