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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes online from text or files — free, instant, and runs entirely in your browser.

Updated

What is the Hash Generator?

Generate cryptographic hashes instantly with this free online hash generator tool. Enter text or upload a file and get MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes computed in real time — all five algorithms run simultaneously in your browser with zero data sent to any server.

Use MD5 or SHA-1 only for legacy or non-security checks where required. SHA-256, SHA-384, and SHA-512 are members of the SHA-2 family; HMAC versions are available for keyed message authentication. These general-purpose hashes are not suitable for storing passwords.

The tool also works as a file hash generator — drag and drop any file up to 100 MB to verify downloads, compare integrity, or generate checksums for distribution. Results can be output in hexadecimal (upper or lower case) or Base64, and a built-in hash verification field lets you paste a known hash to instantly check it against your generated results.

Everything runs in your browser using the Web Crypto API for SHA algorithms and a JavaScript implementation for MD5. The input is not uploaded to a hashing service.

How it works

Input

Choose between Text mode (type or paste a string) and File mode (upload or drag-and-drop any file up to 100 MB). The tool processes data entirely in your browser — nothing leaves your device.

Hash Computation

Five algorithms run simultaneously in parallel:

  • MD5 (128-bit) — computed via a pure JavaScript implementation of RFC 1321.
  • SHA-1 (160-bit) — computed via the browser's native Web Crypto API.
  • SHA-256 (256-bit) — a widely used SHA-2 hash, including in digital signatures and Bitcoin's proof-of-work.
  • SHA-384 (384-bit) — a truncated variant of SHA-512, commonly used in certificates.
  • SHA-512 (512-bit) — a SHA-2 hash with a 512-bit output.

When an HMAC secret key is provided, the tool produces HMAC variants of the selected hashes. HMAC can help verify message integrity and authenticity when the key is managed securely. Do not use these general-purpose hashes or HMAC results as stored passwords.

Output

Results are displayed as hexadecimal or Base64 strings, selectable via a dropdown. The Uppercase toggle (hex mode only) converts output to uppercase for compatibility with systems that require it. Each algorithm has an independent Copy button.

Verification

Paste any hash into the Verify Hash field to check it against all five generated digests. The comparison is case-insensitive and whitespace-tolerant, giving you an instant match indicator per algorithm.

Examples

Hash a text string with SHA-256

Generate a SHA-256 hash from a plain-text password or message.

Hello, World!
 
dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f

Hash text with MD5

Produce a 128-bit MD5 hash commonly used for checksums and quick fingerprinting.

password123
 
482c811da5d5b4bc6d497ffa98491e38

Generate HMAC-SHA-256 with a secret key

Create a keyed hash for message authentication using HMAC-SHA-256.

Message text + secret key: "mySecret"
 
HMAC: 5e39… (32-byte keyed digest)

Frequently asked questions

How to generate a SHA-256 hash online?

Select the Text input mode, type or paste your message into the text area, and the tool instantly computes a SHA-256 hash (along with MD5, SHA-1, SHA-384, and SHA-512). Results appear in real time — no button click required. You can copy any hash with a single click.

How to create a SHA-256 hash from a file?

Switch to File mode, then drag and drop any file (up to 100 MB) or click the upload area to browse. The tool reads the file entirely in your browser and generates SHA-256 plus four other algorithm hashes simultaneously. No file is ever uploaded to a server.

What is SHA-256 used for?

SHA-256 is a cryptographic hash function in the SHA-2 family, used for tasks such as digital signatures and file-integrity checks. Bitcoin's proof-of-work also uses SHA-256. A 256-bit output makes finding collisions computationally impractical with known attacks, but no hash function makes collisions mathematically impossible. SHA-256 by itself is not suitable for password storage.

What is the difference between MD5, SHA-1, SHA-256, and SHA-512?

MD5 and SHA-1 have known collision attacks and should not be used where collision resistance is needed. SHA-256, SHA-384, and SHA-512 belong to SHA-2 and are widely used for general-purpose cryptographic hashing. SHA-384 is a SHA-2 variant with a 384-bit output. None of these general-purpose algorithms is a password-hashing function.

Can I use this hash generator for passwords?

The tool can calculate a digest for any text, but do not use its general-purpose hashes to store passwords. Password storage should use a dedicated password-hashing function such as Argon2id, scrypt, or bcrypt, configured with an appropriate work factor and unique salt.

What is an HMAC and how do I use it here?

HMAC (Hash-based Message Authentication Code) combines a secret key with a message to produce a keyed hash that verifies both integrity and authenticity. Enter your secret key in the HMAC field, and the tool computes HMAC-MD5, HMAC-SHA-1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 alongside the standard hashes.

Is this hash generator secure? Does it send data to a server?

Hash calculation happens in your browser using the Web Crypto API for SHA algorithms and a JavaScript implementation for MD5. The input is not sent to a hashing service. Avoid entering secrets into any website unless you trust the page and its delivery.

How do I verify a hash I already have?

After generating hashes, paste your known hash into the Verify Hash field. The tool compares it against every generated result and shows a match or no-match indicator for each algorithm. Comparison is case-insensitive and ignores leading or trailing whitespace.

Can I get the hash in Base64 instead of hexadecimal?

Yes. Use the Output Format dropdown to switch between hexadecimal and Base64 encoding. When hexadecimal is selected, an Uppercase toggle also becomes available so you can match any required casing format.

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