Cryptographic Hash Generator - Free & No Account Required

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC digests for text or files. Everything is processed locally in your browser without uploading your data.

Generate a hash See how it works
Text and file hashing HMAC generation Digest verification No uploads

Hash Generator & Verifier

Hash UTF-8 text or files, create keyed HMAC values, and compare results against an expected digest.

Local processing

SHA-256 is a strong general-purpose choice for checksums and integrity verification.

Not requested

Ready. Your input stays on this device.

Algorithm SHA-256
Input size 0 B
Digest size 256 bits
Processing time 0.0 ms

Shortcut: Ctrl/โŒ˜ + Enter to generate

01
Private by design Input remains on your device
02
Text and files Hash files up to 100 MB
03
HMAC support Authenticate data with a key
04
Digest verification Compare integrity checksums
Private integrity utility

Generate hashes without uploading your data

This Hash Generator calculates digests for UTF-8 text and binary files directly inside your browser. Files, text, expected checksums, and HMAC keys are not sent to a remote conversion server.

Select SHA-256 for a strong general-purpose checksum, use SHA-384 or SHA-512 when a longer digest is required, or generate MD5 and SHA-1 only for compatibility with older systems.

Verify file integrity

A published checksum can help confirm that a downloaded file has not changed. Generate a digest for your local file, paste the expected value, and the tool will compare the underlying digest bytes.

Create keyed HMAC values

HMAC combines a secret key with a SHA algorithm. It is useful when you need both integrity and proof that the digest was created by someone who possesses the same key.

Complete workflow

A useful hash tool for development and verification

Generate, format, verify, copy, and download digests from one responsive interface.

Local processing

Input is hashed with native browser cryptography or the local legacy checksum implementation.

Five hash algorithms

Generate MD5, SHA-1, SHA-256, SHA-384, or SHA-512 according to your workflow.

Keyed HMAC

Generate HMAC-SHA values for authenticated messages, signatures, integrations, and testing.

Checksum comparison

Paste an expected digest and receive a clear match, mismatch, or invalid-format result.

Flexible output

Use lowercase or uppercase hexadecimal, Standard Base64, or unpadded Base64url.

Text and file input

Hash Unicode text accurately or calculate a checksum for any local file up to 100 MB.

Three simple steps

How to generate or verify a hash

No software installation, account, or file upload is required.

Step 1

Provide text or a file

Enter UTF-8 text or select a binary file from your device.

Step 2

Choose the algorithm

Select a hash or HMAC algorithm and your preferred output representation.

Step 3

Generate and compare

Copy the digest or paste an expected checksum to verify that the values match.

Algorithm guide

MD5 vs SHA-1 vs SHA-2

Choose an algorithm based on compatibility and security requirements, not digest length alone.

Algorithm Digest size Status Recommended use
MD5 128 bits / 32 hex characters Legacy Compatibility checks only. Do not use for adversarial integrity or signatures.
SHA-1 160 bits / 40 hex characters Legacy Older systems and published checksums where compatibility is required.
SHA-256 256 bits / 64 hex characters Recommended General integrity verification, APIs, files, and modern development.
SHA-384 384 bits / 96 hex characters Modern Protocols or systems specifically requiring a 384-bit SHA-2 digest.
SHA-512 512 bits / 128 hex characters Modern Long SHA-2 digests and workflows explicitly standardized on SHA-512.
Common workflows

Practical uses for cryptographic hashes

01

Verify downloaded files

Compare a local file digest with a checksum published by the software distributor.

02

Test API integrations

Generate expected HMAC signatures and digest values while developing authenticated integrations.

03

Detect data changes

Compare two independently generated digests to identify whether the underlying bytes changed.

04

Debug encoding issues

Compare UTF-8 text hashes and alternate digest representations across languages and systems.

Common questions

Hash Generator FAQ

Is this online Hash Generator private?

Yes. Text, files, and HMAC keys are processed locally in your browser. This page does not upload your input to a server.

Which hash algorithm should I use?

SHA-256 is a strong general-purpose default for checksums and integrity verification. SHA-384 and SHA-512 provide longer digests. MD5 and SHA-1 should only be used for legacy compatibility, not security.

Is hashing the same as encryption?

No. Encryption is designed to be reversed with a key, while a cryptographic hash is a one-way digest. A hash does not hide the original data and is not a substitute for encryption.

Can I generate a hash for a file?

Yes. Select or drop a file up to 100 MB and the tool will calculate its digest locally. The file is not uploaded or rendered.

What is an HMAC?

An HMAC combines a secret key with a cryptographic hash to authenticate data and verify that it was created by someone who possesses the same key.

Should I store passwords using SHA-256?

No. Passwords should be stored with a dedicated password-hashing function such as Argon2id, scrypt, bcrypt, or PBKDF2 using an appropriate salt and cost.

Why does a tiny input change produce a different hash?

Cryptographic hash functions are designed with an avalanche effect, so even a one-bit input change should produce a substantially different digest.

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Ready to generate a private hash?

Hash text or files, create HMAC values, and verify checksums locally without uploading your data.

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