Skip to content
ProgrammerKit

Text Diff Checker

Compare two blocks of text line-by-line.

Free · Runs in your browser · Last updated 

  
  
 
About this tool
 
Side-by-side diff with added, removed and unchanged lines highlighted. Useful for comparing configs, logs and prose.
 
Privacy
 

All processing for Text Diff happens locally inside your browser using JavaScript.
        Your input is never uploaded to a server, logged, or shared with third parties.

 
  
 
Frequently asked questions
 
 
  Is the Text Diff free to use?   
Yes. Text Diff is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.
 
  Is my data safe when I use Text Diff?   
All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.
 
  Does Text Diff work offline?   
Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.
 
  Which browsers are supported?   
Text Diff works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.
 
  Do I need to install anything?   
No. Text Diff runs in any modern web browser with no installation, browser extension, or account required.
 
 
 
 
 
More developer tools
 
  
Compare Anything
 
Side-by-side diff for JSON, XML, contracts, specs, job offers — with decision matrix.
  
JSON Formatter
 
Format, beautify, minify and validate JSON instantly in your browser.
  
XML Formatter
 
Pretty-print, minify and validate XML documents online.
  
YAML Formatter
 
Validate and re-emit YAML in a clean normalized form.