Free online text & code diff checker
Compare two text documents, code snippets, or configuration files side-by-side or unified with instant visual color highlighting. Identify additions, deletions, and line-by-line modifications instantly without uploading sensitive files or code to third-party cloud servers.
How to compare text and code
- Paste or type your original text or code into the left pane.
- Paste the modified or updated version into the right pane.
- Switch between Split (side-by-side) and Unified views to inspect changes.
- Toggle between Lines, Words, or Characters comparison modes depending on the precision you need.
- Click Copy Diff or inspect total additions and deletions at a glance.
Why use in-browser diff checking
Most commercial diff checker websites store or log your text, source code, API keys, or confidential documents on their backend servers. ToolCrix computes all text diffs strictly on your local machine using fast client-side algorithms, guaranteeing 100% confidentiality and data privacy.
Key features & benefits
- Granular precision: compare differences line-by-line, word-by-word, or character-by-character.
- Split & unified views: choose between GitHub-style split columns or inline unified views.
- Quick swap & samples: easily invert comparisons or test with pre-filled code samples.
- Zero server uploads: your proprietary code, credentials, and confidential docs never leave your browser.