About this online tool
hidevtool SHA hash generator digests UTF-8 text into lowercase hexadecimal. Pick SHA-1, SHA-224, SHA-256, SHA-384, or SHA-512—processing stays in your browser and text is not uploaded.
Online SHA hash capabilities
What is a SHA hash?
SHA (Secure Hash Algorithm) turns input into a fixed-length fingerprint. The same text always yields the same digest; a tiny change in input produces a completely different hash. It is used for integrity checks, not for storing passwords by itself.
Algorithms on this page
- SHA-256 — common default; 64 hex characters; good for new projects.
- SHA-512 / SHA-384 — longer digests; SHA-384 is a truncated SHA-512 variant.
- SHA-224 — 56 hex characters; less common but supported for compatibility.
- SHA-1 — 40 hex characters; legacy only; do not use for security-sensitive designs.
Input & output
- Input is treated as UTF-8 text (including Chinese and emoji).
- Output is lowercase hexadecimal with no spaces—easy to copy into scripts or configs.
- An empty string still has a well-defined hash for each algorithm (useful for test vectors).
SHA vs password storage
- Plain SHA of a password is fast to guess—use PBKDF2, bcrypt, or Argon2 with salt instead.
- For file integrity, prefer SHA-256 or SHA-512; match the algorithm your toolchain expects.
Security tips
- 1Prefer SHA-256 or SHA-512 for integrity; retire SHA-1 except when interfacing with old systems.
- 2Do not rely on SHA alone to protect passwords—add salt and a slow key-derivation function.
- 3When comparing digests, use a constant-time compare in your app to reduce timing leaks.
- 4Treat hashes as one-way: you cannot recover the original text from the digest.
- 5For HMAC or signed payloads, use the dedicated HMAC tool on this site.
Common use cases
API & config checksums
Verify that a JSON body or config string matches the SHA your backend or CI pipeline prints.
Release artifacts
Compute digests of download notes or build logs before publishing checksum files.
Learning & debugging
Compare with openssl or language standard libraries when integrating hash calls.
Frequently asked questions
- Which SHA algorithms are supported?
- SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512. Choose an algorithm and enter text—the digest updates automatically.
- Is input case-sensitive?
- Yes. "Hello" and "hello" produce different hashes because UTF-8 bytes differ.
- How do I hash Chinese or emoji?
- Type or paste directly—the tool UTF-8-encodes the string before hashing, same as most programming languages.
- Why is my hash different from another site?
- Check the algorithm (SHA-256 vs SHA-512), encoding (UTF-8 vs UTF-16), and whether the other tool trims whitespace or reads a file as binary.
- Is my text uploaded?
- No. Hashing runs entirely in your browser.