Diff Tool

Diff Tool — compare two texts online

The tool performs a line-by-line comparison of two texts using the Myers diff algorithm and highlights added, removed, and unchanged lines.

Use cases

• Comparing versions of configuration files;
• Reviewing code changes without git;
• Comparing translated texts;
• Finding differences in log files.

How to read the diff

• + green — line added in the modified text;
• − red — line removed from the original;
• · grey — line unchanged.

Frequently Asked Questions

• What text formats does Diff Tool support?

  The tool works with any text in UTF-8 or Windows-1251 encoding: source code (Python, PHP, JavaScript), configuration files (YAML, JSON, XML), Markdown, HTML, SQL queries, log files, and plain text. Each version can be up to 1 million characters long.

• Can I trust the tool with confidential data?

  Yes. Diff Tool on 101ip.ru works entirely client-side inside your browser. No data is ever sent to the server — all computation happens locally. You can safely compare private keys, passwords, or commercially sensitive information.

• How do I get change statistics and download the result?

  After clicking "Compare", statistics appear below the input fields: total lines, lines added, lines removed, and percentage match. The result can be copied by selection or downloaded as a .txt file using the "Download result" button. HTML export is also available.