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File Encoding Checker - Online Detect Text File Charset

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File Encoding Checker

Easily detect the character encoding (charset) of any text file

Drag & drop a text file here

or click to browse

Detection Result
File Name: -
File Size: -
MIME Type: -
Detected Encoding: -
Confidence: -
BOM: -
Text Preview (decoded with detected encoding):

            Preview shows first few lines. May be garbled if detection is inaccurate.
          

          
        

      

    

  


  

    

      
Frequently Asked Questions

      

        

          

            
          

          

            

              Character encoding is a system that maps characters (letters, symbols, etc.) to specific byte sequences. It determines how computers store, transmit, and interpret text data. Common encodings include UTF-8, ASCII, ISO-8859-1, and UTF-16.
            

          

        

        

          

            
          

          

            

              Without the correct encoding, text files can appear as garbled characters or “mojibake”. Detecting the charset ensures proper display, processing, and data interchange across different systems and browsers.
            

          

        

        

          

            
          

          

            

              This tool uses heuristic analysis based on byte patterns, byte order marks (BOM), and character frequency statistics to guess the most likely encoding. It provides a confidence score to indicate the reliability of the detection.
            

          

        

        

          

            
          

          

            

              The underlying library (jschardet) supports a wide range of encodings including UTF-8, UTF-16 (LE/BE), UTF-32, ISO-8859-*, Windows-125*, EUC-*, GB2312, Big5, Shift_JIS, and many more. However, detection accuracy may vary for short or ambiguous files.
            

          

        

        

          

            
          

          

            

              Yes, in many cases encoding can be inferred from byte sequences, especially if the file contains a BOM. However, without a BOM, detection is probabilistic and may not be 100% accurate. Tools like this use statistical models to make an educated guess.
            

          

        

      

    

  










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