Hash Generator
Generate SHA-256, SHA-1, and MD5 hashes from any text. Instant, browser-based, nothing sent to any server.
waiting for input…waiting for input…waiting for input…How to Use
- 1
Enter your text
Type or paste any text you want to hash.
- 2
View all hashes
SHA-256, SHA-1, and MD5 hashes are generated instantly as you type.
- 3
Copy your hash
Click Copy next to the algorithm you need.
How It Works
This tool generates SHA-256, SHA-1, and MD5 cryptographic hashes from any text input, using the browser's built-in Web Crypto API — nothing you type is sent to a server.
What a hash function does
A hash function takes any input and produces a fixed-length output (a "digest") that's effectively unique to that exact input — even a single-character change in the input produces a completely different hash. Hashes are one-way: you can't reconstruct the original input from the hash alone.
Why SHA-256 is recommended over MD5 or SHA-1
MD5 and SHA-1 are older algorithms with known cryptographic weaknesses (researchers have demonstrated ways to engineer two different inputs that produce the same hash, called a collision) — they're still useful for basic file-integrity checks but are not considered secure for anything security-sensitive like password storage. SHA-256 has no practical known collision vulnerabilities and is the standard choice for security-relevant hashing today.
Examples
Verifying a downloaded file wasn't corrupted or tampered with
Comparing the SHA-256 hash of a downloaded file against the hash published by the file's source confirms the file is byte-for-byte identical to what was published, with no corruption or tampering during download.
Generating a hash for a data fingerprint
Hashing a piece of text produces a short, fixed-length fingerprint that can be compared later to detect if the original text changed at all, without storing the full original text.
Common Use Cases
- Verifying file integrity by comparing hash values against a published checksum
- Creating a fingerprint of data to detect changes without storing the full original content
- Generating a quick hash for development, testing, or educational purposes
Tips
- Never use plain SHA-256 (or any single-pass hash) alone for password storage — proper password storage needs a purpose-built algorithm like bcrypt or Argon2 that includes salting and deliberate slowness to resist brute-force attacks, which general-purpose hash functions don't provide.
- For file-integrity verification specifically, SHA-256 is a good default — but always compare against a checksum from a trusted source (like the software publisher's official site), since a hash only proves the file matches what you're comparing it to, not that the comparison source itself is trustworthy.
Frequently Asked Questions
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