Hash & Encryption

Hash & Encryption — 6 free browser-based developer tools including MD5 Hash Generator, SHA-256 Hash Generator and Password Generator. Everything runs locally with no signup or uploads, so your data stays private and results are instant.

6 tools

MD5 Hash GeneratorMD5 hash generator for text or files, using a pure JavaScript implementation of RFC 1321. Ideal for integrity checks and data verification, free and instant in your browser.

SHA-256 Hash GeneratorSHA-256 hash generator that computes secure digests from text or uploaded files with the Web Crypto API, including HMAC-SHA256 with a secret key. Verify hashes by comparison, free and entirely in your browser.

Password GeneratorPassword generator that creates cryptographically secure random passwords with crypto.getRandomValues and measures entropy strength in bits. Exclude ambiguous characters, pick 4 to 128 characters and generate in bulk, free in your browser.

Bcrypt Hash GeneratorFree online Bcrypt tool that generates salted password hashes with adjustable cost rounds and verifies a plaintext password against an existing hash.

HMAC GeneratorFree online HMAC generator to create keyed message authentication codes with HMAC-SHA256 or HMAC-SHA512. Enter a message and secret key to compute a signature and verify webhooks and APIs.

Hash CompareFree online hash compare tool to verify file integrity and checksums. Paste two hash values or compute MD5, SHA-1 and SHA-256 of a file and instantly see whether they match.

How to Use

1
Choose the algorithm for the job— SHA-256 for file integrity and API signatures, MD5 only for legacy checksums, bcrypt for storing passwords, HMAC when a shared secret signs the message.
2
Enter the text or drop the file— Digests are computed with the browser's Web Crypto API inside the tab, so even a large file is read locally and never uploaded.
3
Verify rather than eyeball— Hash Compare checks two digests character by character, and the Bcrypt tool verifies a plaintext password against an existing hash instead of re-hashing it.

Frequently Asked Questions

Bcrypt, not MD5 or SHA-256. The Bcrypt Hash Generator salts every hash and lets you raise the cost factor, which makes brute forcing deliberately slow, while plain MD5 and SHA-256 are fast enough that a modern GPU tries billions of guesses per second.

No — hashing is a one-way function, so there is no reverse operation. Short or common inputs can still be looked up in precomputed rainbow tables, which is exactly why a password hash needs a salt and a cost factor rather than a bare MD5.

Yes, for non-security work: file integrity checks, deduplication keys and cache busting, where you only need to know whether two blobs differ. Use Hash Compare to check a download against a published checksum, and switch to SHA-256 or HMAC whenever an attacker could tamper with the data.