Hash Generator
Generate cryptographic hashes for text or files. Supports MD5, SHA-1, SHA-256, SHA-224, SHA-384, and SHA-512. Everything runs in your browser — nothing is sent to any server.
Algorithm
Text input
Hash a file
Drag & drop a file here
Browse fileHash output
Nothing is sent to our servers. All hashing happens entirely in your browser.
Verify hash
How to use this tool
- Select a hash algorithm from the tab strip at the top (MD5, SHA-1, SHA-256, etc.).
- Paste or type your text into the input field — the hash is generated instantly on every keystroke.
- To hash a file, drag and drop it onto the file area or click 'Browse file'. Works with any file type.
- Toggle HMAC mode and enter a secret key to generate a keyed hash for message authentication.
- Paste an expected hash into the comparison field to verify whether it matches your output.
Why use our Hash Generator?
Whether you're verifying a downloaded file's integrity, storing passwords securely, or debugging an API signature, you need a fast and trustworthy hash tool. This generator uses the browser's native Web Crypto API and never sends your data anywhere — making it the safest option for sensitive content.
Frequently Asked Questions
Is MD5 still secure?
MD5 is cryptographically broken and should not be used for security-sensitive purposes such as password hashing or digital signatures. However, it remains widely used for non-security checksums — for example, verifying that a file downloaded correctly — because it is fast and universally supported.
Can you reverse a hash?
No. Hash functions are one-way by design: they take any input and produce a fixed-length output, but it is mathematically infeasible to go from the hash back to the original input. This is what makes them useful for storing passwords — even if the database is leaked, attackers cannot recover the original passwords.
What is HMAC?
HMAC (Hash-based Message Authentication Code) combines a hash function with a secret key to produce a keyed hash. It is used to verify both the integrity and the authenticity of a message — confirming that the message was not tampered with and was produced by someone who knows the secret key.
What is the difference between SHA-1 and SHA-256?
SHA-1 produces a 160-bit (40 hex character) digest and is considered weak against collision attacks. SHA-256 is part of the SHA-2 family and produces a 256-bit (64 hex character) digest with much stronger security guarantees. For new applications, SHA-256 or SHA-512 is always preferred.
Is my data safe when I use this tool?
Yes. All hashing runs entirely inside your browser using the Web Crypto API. No data — whether text or files — is ever uploaded to DecoToolkit's servers or any third party. You can even disconnect from the internet and the tool will continue to work.
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