Hash Generator
Local processing · never uploadedGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text — instantly and locally.
What is Hash Generator?
Hash Generator computes the MD5, SHA-1, SHA-256 and SHA-512 hashes of any text you type or paste, all at once and entirely in your browser. As soon as you start typing, every hash updates so you can copy the exact digest you need.
A hash is a fixed-length fingerprint of arbitrary input. A hash function takes any amount of data and deterministically produces a short string of bytes — the same input always yields the same output, while even a one-character change produces a completely different result. Because the output length is fixed and the mapping is one-way, hashes are ideal for comparing, indexing and verifying data without storing or transmitting the original. This tool shows the result as a lowercase hexadecimal string, the format most systems and command-line tools expect.
The four algorithms differ in length and strength. MD5 produces a 128-bit (32 hex character) digest and SHA-1 produces a 160-bit (40 character) digest; both are fast but are considered cryptographically broken because practical collision attacks exist, so they must NOT be used for passwords, digital signatures or any security decision. They remain fine for non-security purposes such as quick checksums, cache keys or detecting accidental changes. SHA-256 (256-bit, 64 characters) and SHA-512 (512-bit, 128 characters) belong to the SHA-2 family and have no known practical weaknesses; prefer SHA-256 or stronger whenever integrity or authenticity actually matters.
Typical uses include verifying that a downloaded file matches a published checksum, generating a stable fingerprint for a piece of content, building deduplication or cache keys, and comparing two values without revealing them. Everything here runs locally in your browser with the Web Crypto API (plus a small self-contained MD5 implementation), so your input never leaves your device and nothing is ever sent to a server — which makes the tool safe to use even on private or sensitive text. The result for each algorithm appears the instant you type, and a copy button next to every row puts the exact digest on your clipboard with a single click.
FAQ
Is MD5 secure?
No. MD5 is cryptographically broken — practical collision attacks let attackers craft two different inputs with the same hash. Never use MD5 for passwords, signatures or any security purpose. Use SHA-256 or stronger. MD5 is only acceptable for non-security checks like detecting accidental file corruption.
Which algorithm should I use?
For anything involving security or integrity, use SHA-256 (or SHA-512). MD5 and SHA-1 are fast but broken, so reserve them for non-security uses such as simple checksums or cache keys.
Is my text uploaded to a server?
No. All hashing happens locally in your browser using the Web Crypto API and a built-in MD5 implementation. Your input never leaves your device.
Why is the SHA-512 hash longer than the others?
The number reflects the bit length of the output: MD5 is 128 bits (32 hex chars), SHA-1 is 160 bits (40), SHA-256 is 256 bits (64) and SHA-512 is 512 bits (128). Longer digests have a larger output space and resist collisions better.
Can I hash a file instead of text?
This tool hashes text input. To hash a file, paste its contents as text, or use a command-line tool like sha256sum. File-level hashing of the raw bytes may be added in the future.