Tool #150 · HTTP / downloads / Unicode filenames

Content-Disposition Header Builder & Filename Encoder

Build correct Content-Disposition headers for downloads and inline content. Generate ASCII fallback filenames, UTF-8 filename* values, preview browser behavior, and copy server snippets without re-reading RFCs at 1 a.m.

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Header inputs

Generated header

Use the full header or just the value, depending on your framework.

HTTP header 

          


          

            

              Header value only
              
            

            

          


          


          

            
Validation & behavior notes

            

          

        

      

    


    

      

        

          
Encoding details

          

            

              
              
            

            

              
              
            

          

        

      


      

        

          
Copyable server snippets

          

            

              Node / Express
              
            

            

              Python / Flask
              
            

            

              Nginx