URL Tools

Mass URL Checker

Mass URL Checker — validate a whole list of URLs at once — each line is checked for valid syntax with a per-row result, and nothing leaves your browser.

Client-sideRuns entirely in your browser — your data never leaves your device, and it works offline once loaded.

Mass URL Checker is a free URL Tools utility that runs entirely in your browser — nothing you enter is uploaded.

URLs (one per line)
Results





  
How to use Mass URL Checker

  
    
      
  1. Drop your URL into the field at the top of Mass URL Checker.
    2. 
      
  2. Press Copy valid and Mass URL Checker shows the result straight away.
    3. 
      
  3. Use Copy to keep or reuse the result.
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About this tool

  
Everything Mass URL Checker does happens on your own device. Mass URL Checker assembles your URL with its parameters locally and keeps it shareable.

  
Reserved characters are escaped to standard rules so the link works everywhere. Your input never leaves the page, and no account or install is required.

  
Frequently asked questions

  

      
What does Mass URL Checker do?
Use Mass URL Checker to check your input without installing anything; everything happens client-side.

      
Does Mass URL Checker cost anything?
No — Mass URL Checker is completely free, with no sign-up and no hidden limits.

      
Does Mass URL Checker upload my data?
No — Mass URL Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.

      
Does Mass URL Checker encode reserved characters correctly?
Yes. Mass URL Checker follows standard percent-encoding rules in your browser so links stay valid.

      
Does Mass URL Checker work offline?
Once the page has loaded, Mass URL Checker keeps working with no network connection.

  

  
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