Compare two texts and highlight every difference. Switch between character, word, and line-level comparison with side-by-side or unified view — all processed locally.
Compare two texts side by side and find every difference instantly. Character, word, and line-level comparison with split and unified views. 100% free, works offline. Whether you need this for personal projects, professional work, or quick one-off tasks — our browser-based tool handles it instantly with no installation, no signup, and no file uploads to external servers. Everything runs locally in your browser for maximum speed and privacy.
Cleaning and formatting text data before importing into databases or spreadsheets. Preparing content for publishing, emails, or documentation. Analyzing text patterns in logs, reports, or research data. Transforming text between different conventions or formats. Processing copied content from PDFs, web pages, or other sources. Quick text operations for writing, editing, or data entry workflows.
All processing happens entirely in your browser — no files are uploaded to any server, ensuring complete privacy. Handles texts with tens of thousands of lines without lag. Supports Unicode characters, accented letters, and CJK text. Real-time preview of all transformations. Copy results to clipboard or download as .txt file. Works with any line-separated or structured text format. Import from files or paste directly from any source.
Paste the original text in the left panel and the modified text in the right panel. You can also load .txt, .json, .csv or any other text file.
Select the comparison level (characters, words or lines) and the view (side by side or unified). Enable options to ignore case or whitespace if needed.
Additions appear in green, deletions in red. Navigate between differences and copy or download the result.
A text diff (short for "difference") is the result of comparing two pieces of text to find what has changed between them. The comparison algorithm identifies additions, deletions, and unchanged sections.
This tool uses the Myers diff algorithm — the same algorithm used by Git and other version control systems. It finds the minimum set of changes needed to transform one text into another, producing clean and readable results.
Character, word & line levelThis text comparison tool runs entirely in your web browser. No text is ever sent to a server, stored in a database, or shared with third parties. You can safely compare confidential documents, source code, or any sensitive content.
Whether you're comparing contracts, code, or internal documents, your data remains on your device and is never logged or analyzed.
100% browser-side processingEverything you need to know about our free text comparison tool