How to generate a hash for free
To generate a hash, open the ToolCrix Hash Generator, type or paste text (or drop a file), choose the algorithm (MD5, SHA-1, SHA-256, SHA-384 or SHA-512), and the hex hash appears instantly. Everything runs in your browser using the Web Crypto API — your data is never uploaded.
Need to generate an MD5, SHA-256 or SHA-512 hash to verify a file download, compare two files, or create a unique identifier? This guide explains what hashing is, which algorithm to use, and how to do it free in your browser.
What is a cryptographic hash?
A hash function takes any input — a word, a sentence, a 5 GB file — and produces a fixed-size string (the "hash" or "digest") that uniquely represents that input. The same input always gives the same hash. Change even one character, and the output is completely different. This property makes hashes ideal for verifying file integrity and detecting tampering.
How to generate a hash (step by step)
- Open the Hash Generator.
- Type or paste your text in the input, or drop a file to hash.
- Choose the algorithm: MD5, SHA-1, SHA-256, SHA-384 or SHA-512.
- The hex hash string appears instantly.
- Copy it and compare against a known hash to verify integrity, or use it as a unique identifier.
Which hash algorithm to use
- SHA-256 — the modern standard. Use for file integrity, checksums, and most general purposes. Part of the SHA-2 family.
- SHA-512 — even stronger than SHA-256. Use for high-security needs.
- MD5 — fast and widely supported, but cryptographically broken. Fine for checksums and non-security uses; do NOT use for passwords or security.
- SHA-1 — deprecated for security. Avoid for new projects; SHA-256 is the replacement.
Common use cases
- Verifying downloads — compare the hash of a downloaded file against the publisher's published checksum.
- Duplicate detection — two files with the same SHA-256 hash are (for all practical purposes) identical.
- Content-addressable storage — use a file's hash as its name for deduplication.
- Commit hashes in Git — Git uses SHA-1 (migrating to SHA-256) to identify every commit.
Frequently Asked Questions
Is MD5 still safe to use?
For non-security checksums and file-integrity verification, yes. For anything security-related (passwords, digital signatures, certificates), use SHA-256 or SHA-512.
Can I hash large files?
Yes — file hashing runs locally in your browser using the streaming Web Crypto API.
Try it now: open the free Hash Generator, or browse more security guides.