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Online SHA-256 Hash Generator Tool

Hash generator for text and files — MD5 to SHA-3, no upload.

  • Runs on your device
  • 8 algorithms · MD5 to SHA-3
  • Verify a checksum in one paste
  • Free to 250 MB · Batch with Pro
Characters: 0Bytes: 0Algorithms: 1
Generated hashes

Paste the value the publisher gave you. The algorithm is worked out from its length.

Enter text or add a file, then the digests appear here.

Use SHA-256, SHA-512 or SHA3-256 for modern security. MD5 and SHA-1 are legacy algorithms and should not be used for password storage; CRC-32 detects accidental corruption only.

Algorithms

Every algorithm is free. Selecting more costs time, not another read of the file.

Output format
Output format
HMAC key
Key is

Leave empty for a plain digest. With a key, every selected algorithm produces an HMAC instead.

Batch export
Pro

Available with Pro, once more than one file has been hashed.

Hashing as you type

Related tools

SHA-256 Hash Generator

Generate SHA-256 hashes from text on your device.

SHA-256 (Secure Hash Algorithm 256-bit) produces a 256-bit (64-character hex) hash. It is part of the SHA-2 family and is the recommended choice for security-sensitive hashing: passwords (with salt), digital signatures, and file integrity. Hashing runs on your device; your data is never sent to a server.

When to use SHA-256 Hash Generator vs other options

Use SHA-256 for any security-related hashing: password hashing (with a proper scheme), certificate fingerprints, and integrity verification. Prefer SHA-256 over MD5 and SHA-1 for new applications. Use MD5 only for legacy or non-security checksums. Use SHA-1 only when a system explicitly requires it.

Compatibility

SHA-256 is supported in all modern languages, OSs, and tools. It is the standard for TLS, code signing, and many APIs. Our tool outputs the same format as command-line and library implementations, so you can verify hashes across systems. On-device only.

Quality considerations

SHA-256 is collision-resistant for practical purposes and is considered secure. Use it with a proper salt and key-derivation (for example for passwords) rather than raw hashing. For file integrity, SHA-256 is a strong choice.

Example use cases

  • Verify file integrity after download (compare hash with published value).
  • Generate content hashes for APIs or storage deduplication.
  • Create fingerprints for documents or assets in secure workflows.
  • Hash passwords or secrets with a proper scheme (salt + KDF) in your app.
  • Check that two files or strings are identical without comparing byte-by-byte.

Powered by optimised image processing algorithms.

← All algorithms (MD5, SHA-256, SHA-1) · MD5, SHA-1

Frequently asked questions

What is SHA-256 and how does this tool work?

SHA-256 (Secure Hash Algorithm 256-bit), part of the SHA-2 family, produces a 256-bit digest shown as 64 hexadecimal characters. Type or paste text and the hash updates instantly on your device. You can copy it, download it, or paste an expected hash to compare and verify a match.

Is my data private when I use this tool?

Yes. SHA-256 hashing runs entirely on your device with JavaScript. Your text is never uploaded to a server, stored, or logged, and it only leaves your device if you copy or download the result yourself, so sensitive input stays completely private.

Is SHA-256 secure?

Yes. SHA-256 is collision-resistant in practice and is the modern standard for integrity, certificates, and digital signatures. For passwords, do not hash raw text alone; combine SHA-256 with a per-user salt and a key-derivation function so stored digests resist brute-force attacks.

Why choose SHA-256 over MD5 or SHA-1?

SHA-256 is designed to be collision-resistant, whereas MD5 and SHA-1 are broken and unsafe for new security work. Its wider 256-bit output makes accidental or malicious collisions computationally infeasible, so it is the right default for integrity checks and fingerprints today.

Can I reverse a SHA-256 hash back to the text?

No. SHA-256 is a one-way function, not encryption, so there is no key to recover the input from the digest. The same text always produces the same 64-character hash, but you cannot mathematically reverse a digest back to the original string.

What is SHA-256 good for, and is it free?

Use it to verify downloads against a published hash, fingerprint documents and assets, generate content hashes for APIs or deduplication, or check two strings are identical without comparing byte by byte. The tool is free, runs offline once loaded, and works on mobile.

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