Text Differ

About Text Differ

Text Differ is a browser-based tool for comparing two pieces of text and viewing the differences between them. Users paste content into side-by-side input boxes, or load it from a file or URL, and the tool highlights additions, deletions, and revisions. It offers multiple comparison modes — paragraph, word-by-word, and character-by-character — along with options to ignore case and whitespace, a one-click revert function, and a 3-way merge feature for combining three versions of a document into one. It supports plain text as well as source code and formats such as JSON, HTML, CSS, JavaScript, and Python.

The tool stores a history of the 10 most recent comparison sessions for later access and allows users to save preference presets for filter settings. It requires no account creation, download, or installation, and is described as free to use.

It is intended for writers and editors comparing document drafts, developers tracking code changes between versions, students checking for accidental revisions or plagiarism in essays, and content reviewers tracking changes in contracts and scripts.

Key features

• Side-by-side text diff with highlighted additions, deletions, and edits
• Multiple comparison modes: paragraph, word-by-word, and character-by-character
• 3-way merge to combine three versions of a file into one
• Ignore case and ignore whitespace comparison settings
• Load text from a URL or uploaded file
• Stores your 10 most recent comparison sessions for later access

Frequently asked questions