#1 Product of the week · Launched July 4, 2023
Diff Text

Diff Text

Dead Simple Text Comparison

FreeVisual editingLanguageHelpers23,864 impressions#1 of its week

Instantly find the differences between two blocks of text. Works with plain text, code, json, yaml, html, css, markdown, and more. Perfect for developers, writers, and anyone that needs to quickly compare text changes online.

Diff Text is a simple online tool that highlights differences between two blocks of text or files.

for
Developers, writers, and anyone needing quick text comparisons.
pricing
free
license
open source
dotspencer/diff-text-feedback 11 0updated 2 years ago

Key features

5 features of Diff Text
  • Multiple comparison modes — Choose word, character, or line comparison to suit your needs.
  • File drag-and-drop — Upload files directly without copying and pasting.
  • Client-side processing — All text stays in the browser and never leaves your device.
  • JSON formatting helper — A magic button formats JSON objects for clearer comparison.
  • Color-coded results — Green highlights additions, red highlights deletions, unchanged text stays neutral.

Use cases

  • Spot code changes between two versions of a script
  • Validate updates in configuration files like YAML or JSON
  • Compare drafts of documentation or markdown files
  • Check differences in HTML/CSS snippets before deployment

Diff Text FAQ

What do the colors indicate in the diff result?+

Green shows added text, red shows removed text, and unchanged text remains uncolored.

How does the "word" mode differ from "char" mode?+

Word mode compares text broken into words, while char mode compares each individual character.

Can I compare whole files without copying the content?+

Yes, you can drag and drop files or use the open file button to load them directly.

Is my data safe when using Diff Text?+

All processing happens client-side in your browser, so the text never leaves your computer.

Does Diff Text support structured data like JSON?+

Yes, clicking the magic button formats JSON objects and arrays for more accurate comparison.

Summarized by DevHunt from difftext.com · Sep 28, 2026. Details may change; check the official site.