MasterTool

Hash Generator

Generate MD5, SHA-256 and CRC32 hashes of text locally. SHA-256 and MD5 are computed by published-algorithm implementations in this page — nothing is uploaded.

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What this tool does

Generate MD5, SHA-256 and CRC32 hashes of text locally. SHA-256 and MD5 are computed by published-algorithm implementations in this page — nothing is uploaded. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.

How to use the Hash Generator

  1. Enter or select text to hash.
  2. Read the calculated result; change any measurement to compare alternatives.

Formula

SHA-256 per FIPS 180-4; MD5 per RFC 1321; CRC32 (IEEE 802.3, reflected polynomial 0xEDB88320, init/final XOR 0xFFFFFFFF) over the UTF-8 bytes of the input.
value
Text to hash

Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.

Worked example

For hash generator, the following measurements illustrate the exact method: Text to hash: abc.

Inputs

  • Text to hashabc

Result

  • SHA-256ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
  • MD5900150983cd24fb0d6963f7d28e17f72
  • CRC32 (hex)0x352441C2
  • CRC32 (decimal)891,568,578
  • Input bytes (UTF-8)3

Results explained

SHA-256
SHA-256 from the formula above. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.
MD5
MD5 from the formula above. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.
CRC32 (hex)
CRC32 (hex) from the formula above. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.
CRC32 (decimal)
CRC32 (decimal) from the formula above. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.
Input bytes (UTF-8)
Input bytes (UTF-8) from the formula above. Hashes are computed over UTF-8 bytes, matching command-line tools fed the same text without a trailing newline. SHA-512 is not offered (see FAQs). MD5 and CRC32 are checksums/legacy digests, not password storage.

Frequently asked questions

ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad — the FIPS 180-4 example value. This tool reproduces it exactly because it implements the published algorithm.

SHA-512 needs 64-bit arithmetic and a large constant table, and the browser's fast crypto API is asynchronous while this calculator is synchronous. SHA-256 covers the overwhelming majority of checksum and fingerprint uses; SHA-512 was skipped deliberately rather than shipped half-tested.

MD5 is fine as a non-cryptographic checksum or legacy fingerprint, but it is collision-broken and far too fast for passwords. Never store passwords with MD5 (or plain SHA-256) — use a password hashing function such as bcrypt or Argon2id on a server.

Error detection in files and protocols (ZIP, PNG, Ethernet). It catches accidental corruption, not tampering: anyone can recompute a CRC. The check value for the ASCII string "123456789" is 0xCBF43926.

Usually a trailing newline or different encoding. This tool hashes exactly the characters entered, encoded as UTF-8, with no newline added.

No. The implementations run in your browser; you can verify by using the tool offline.