Free Online Hash Generator

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Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly. All processing happens locally.

Input Text
Enter text or upload a file to hash

0 characters

Generated Hashes
Click any hash to copy
32 chars
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40 chars
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64 chars
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128 chars
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About Hash Functions

Hash functions are one-way cryptographic algorithms that convert input data into a fixed-size string. They are widely used for data integrity verification, password storage, and digital signatures.

Algorithm Comparison

  • MD5: 128-bit hash, fast but cryptographically broken. Use only for checksums.
  • SHA-1: 160-bit hash, deprecated for security use but common in legacy systems.
  • SHA-256: 256-bit hash, part of SHA-2 family. Recommended for most security applications.
  • SHA-512: 512-bit hash, stronger but slower. Use when maximum security is needed.

Frequently Asked Questions

A hash function converts any input data into a fixed-size string of characters. The same input always produces the same hash, but it's computationally infeasible to reverse the process or find two inputs with the same hash.

For security purposes, use SHA-256 or SHA-512. MD5 and SHA-1 are considered weak for cryptographic use but are still useful for checksums and non-security applications.

Yes! You can upload a file and we'll generate hashes for its contents. This is useful for verifying file integrity or comparing files.

All hashing is done locally in your browser using the Web Crypto API. Your data never leaves your device.

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The Complete Guide

About the Hash Generator

Cryptographic hash functions take any input — a password, a file, a JSON document — and produce a fixed-length fingerprint that can verify the input has not changed. Hashes are the backbone of password storage, file integrity checking (the "checksum" you see on every Linux ISO download), Git commits, blockchain transactions, and digital signatures.

Our Hash Generator computes five popular hash algorithms in real-time as you type: MD5 (128-bit, deprecated for security but still everywhere for non-security checksums), SHA-1 (160-bit, deprecated by NIST in 2011 but used by Git), SHA-256 (256-bit, current gold standard), SHA-384, and SHA-512. All hashes are computed via the Web Crypto API natively in your browser — your input never leaves the page.

Below the hashes you'll see the hex, Base64, and uppercase variants, plus a one-click copy for each. Hash any UTF-8 text instantly.

How to use Hash Generator

1

Type or paste your input

Anything goes — a password, a JSON object, a file's contents, a chunk of binary encoded as text. The tool hashes whatever you put in.

2

Hashes update in real-time

As you type, all five hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512) recompute instantly. No "Hash" button to click.

3

Compare or verify

Use this to verify a file checksum: download a file, compute its SHA-256 here, and compare to the published value. They must match exactly.

4

Choose your format

Each hash has a hex representation (most common), Base64 (shorter, often used in HTTP headers), and uppercase variants. Click the format you need to copy.

Common Use Cases

Verify download integrity

Check that an ISO, installer, or release tarball hasn't been corrupted or tampered with during download — match the SHA-256 from the official site.

API request signing

Many APIs (AWS, Stripe, Twilio) require an HMAC signature where you hash the request body with a secret. Use this to test your signing logic.

Password storage research

See exactly how your password would be stored if the website uses MD5 (don't use!) vs bcrypt vs SHA-256. Educational only — never store user passwords with bare SHA-256.

Deduplication and caching

Hash content to create a stable cache key. Two identical inputs produce identical hashes, so you can dedupe files or API responses.

Git commit lookups

Git uses SHA-1 to identify commits. Compute the SHA-1 of your file content to understand how Git's object database works.

Frequently Asked Questions

Never for security. MD5 is broken — researchers can produce collisions in seconds. Use it only for non-security checksums (file integrity where you trust the source). For security use SHA-256 or stronger.

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