Online SHA-3 Hash Calculator

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Output Length
Standard Examples
Drop a file here
Or click the button below to select a file. Calculated entirely locally · Supports files up to GB size
File Name File Size Algorithm SHA3-256
Output Format
Calculated locally in your browser; no data is uploaded
Selectable output lengths: 224 / 256 / 384 / 512 bits

Calculation Details

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Note: Hashes are calculated from the actual bytes. Changes to newlines, spaces, or encoding will produce different results.
SHA-3 is a newer generation hash standard published by NIST in 2015. It is based on the Keccak algorithm and has a completely different internal structure from SHA-2. It can be used as an alternative or complement to SHA-2.
Privacy Notice：All calculations are performed locally in your browser. Your input and files are never uploaded to any server.

SHA3-224/256/384/512 hashing with batch output, file processing and hash verification

Online SHA-3 Hash Calculator

SHA-3 is a modern cryptographic hash standard published by NIST in 2015. It is based on the Keccak sponge construction and uses a completely different internal design from SHA-2, providing an independent alternative hash family.

Core Features

  • Supports four SHA-3 variants: SHA3-224, SHA3-256, SHA3-384 and SHA3-512.
  • Allows calculating multiple hash lengths from the same input at once.
  • Provides text hashing, file hashing and hash verification modes.
  • Supports drag-and-drop file processing with progress information.

Output Length and Format

SHA3-224 outputs 56 hexadecimal characters, SHA3-256 outputs 64 characters, SHA3-384 outputs 96 characters and SHA3-512 outputs 128 characters. Output format can be switched between Hex and Base64. Hex output supports uppercase conversion. Results can be copied or exported as TXT, JSON and CSV files.

File Processing

Large files are processed locally using streaming calculation. Files are read in chunks to avoid loading the entire file into memory. The tool displays processing progress and calculation information for easier verification across different environments.

Hash Verification

Paste an expected SHA-3 hash value and compare it with the calculated result. The tool helps verify downloaded files, software packages and cross-platform implementation results.

Error Handling

  • Missing files or failed file reading will show clear error messages.
  • Unsupported algorithms or calculation module failures will be reported.
  • Verification mode requests complete hash values before comparison.

Usage Scenarios

  • Verify SHA-3 results between different programming languages.
  • Check file integrity using SHA-3 digests.
  • Compare SHA-3 and SHA-2 hash output formats.
  • Learn modern cryptographic hash algorithms.

Privacy and Security

All calculations are performed locally in the browser. Text and files are not uploaded or stored. Password storage should use dedicated password hashing algorithms such as bcrypt or Argon2 instead of general-purpose hash functions.

Calculate SHA-3 hash values online

SHA-3 is a NIST standardized hash family based on Keccak sponge construction and provides an independent alternative to SHA-2.
  • Supports SHA3-224, SHA3-256, SHA3-384 and SHA3-512 algorithms
  • Can calculate multiple SHA-3 output lengths from one input
  • Provides text hashing, file hashing and verification modes
  • Supports Hex and Base64 output with uppercase switching
  • Exports results as TXT, JSON and CSV files
  • Runs locally in the browser without uploading input data
Suitable for file verification, cross-language testing and cryptography learning. Calculations run locally in the browser and input data is not uploaded.
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