Santekno/tools
CategoriesTutorials

Text Diff

Compare two texts line-by-line, word-by-word, or as unified patch — all in your browser.

Processed in your browserUpdated · Jan 2026
Input
0 charsmode
Output
0 chars

How to use Text Diff

Paste your input on the left, choose the options you want, and the output appears instantly on the right. Everything runs in your browser — none of your data is sent to a server.

  • Paste or type your input in the INPUT panel
  • The output regenerates automatically as you type
  • Use Copy to put the result in your clipboard
  • Click Sample to load a working example

What is Text Diff?

Text Diff highlights what changed between two pieces of text. Useful for reviewing edits, comparing configuration files, and verifying copy-paste accuracy. Three modes are available: line (default), word, and unified patch format compatible with `git apply`. Separate the two texts with a line containing only `---`. This tool is part of santekno's developer toolbox — a curated collection of utilities built for engineers who care about speed, privacy, and simplicity.

Common use cases

  • Debugging API payloads and integration issues
  • Inspecting tokens, hashes, or encoded strings during development
  • Generating fixtures and sample data for tests
  • Sharing readable output with teammates in code reviews

FAQ

Place a line containing only `---` between them. Everything before is the "before" text; everything after is "after".