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T TechnShield
Tool

Hash Generator

Compute checksums & HMACs for text and files: MD5, SHA-1/256/384/512, SHA3-256/512. Hex or Base64 output, verify against a known value, and export.

Input mode
Algorithm
Chars: 0 · Bytes: 0
Chars: 0

Applies to hex output only.

Salt is concatenated as prefix + input + suffix.

Live preview
Algorithm: SHA-256 · Bits: 256 · Time: – ms

            


            
            

              
 WebCrypto fast

              
 MD5 & SHA-3 via loader

              
 HMAC key support

              
 File hashing

            

          

        

      

    

  


  
  

    

      
How it works

      

        

          
1) Choose algorithm

          
Use SHA-256/512 for robust checksums. MD5 is for legacy/non-security use.

        

        

          
2) Paste text or pick a file

          
We hash locally in your browser. Toggle HMAC for keyed hashes.

        

        

          
3) Copy or download

          
Choose hex/base64 output, uppercase/grouping, and verify against a known digest.

        

      

    

  


  
  

    

      

        
        

          

            
Hashing 101: Checksums, HMACs & Best Practices

            
Learn when to use SHA-256 vs MD5, how HMAC adds authenticity, and tips for comparing digests.

          


          

          

            
What is a hash?

            
A hash maps data to a fixed-size digest (e.g., 256 bits). Small changes in input cause large, unpredictable changes in the output (“avalanche effect”).

          


          

            
HMAC vs plain hash

            
HMAC (Hash-based Message Authentication Code) mixes a secret key with the message to provide integrity and authenticity. Use HMAC-SHA-256 or HMAC-SHA-512 for API tokens or webhooks.

          


          

            
Which algorithm should I pick?

            
    
              
  • SHA-256 / SHA-512: modern, widely supported; good for checksums/HMACs.
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  • SHA-3-256/512: alternative standardized family; useful if required by a spec.
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  • MD5 / SHA-1: collision-broken; OK for non-security checks like file integrity where tampering is not a concern.
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Comparing digests safely

            
Normalize encodings (hex vs base64), case, and whitespace. For programmatic checks, prefer constant-time comparison when secrets are involved.

          


          

            
FAQ

            

              

                Is hashing encryption?
                
No. Hashing is one-way; encryption is reversible with a key.

              

              

                Can I reverse a hash?
                
No — hashes are not designed to be reversed.

              

              

                Why do results differ across tools?
                
Different encodings (hex/base64), newline handling, Unicode normalization, or salts/HMAC options can change the output. Make sure settings match.