Davemi ToolsHash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 & SHA-512 hashes from text or files. Live results as you type, all running in your browser.
Input Text
0 charsType text or upload a file to generate hashes
What is a hash?
A cryptographic hash function takes any input — a word, a paragraph, or an entire file — and produces a fixed-length fingerprint (digest). The same input always produces the same hash, but even a single character change produces a completely different output. Hashes are one-way: you cannot reverse them back to the original data.
How to use this tool
- Type or paste text, or upload a file.
- Hashes for all selected algorithms update live.
- Toggle between Hex, Base64, or Binary output.
- Click Copy next to any hash to grab it.
Common use cases
- Verifying file integrity after downloading
- Generating checksums for data validation
- Comparing two files without opening them
- Creating content-addressable identifiers
- Validating data in APIs and webhooks (HMAC signatures)
- Understanding hash output for blockchain & cryptography
Algorithm comparison
| Algorithm | Bits | Hex Length | Security |
|---|---|---|---|
| MD5 | 128 | 32 | Broken |
| SHA-1 | 160 | 40 | Deprecated |
| SHA-256 | 256 | 64 | Strong ✓ |
| SHA-384 | 384 | 96 | Strong ✓ |
| SHA-512 | 512 | 128 | Strong ✓ |
Frequently Asked Questions
What is a hash function?
A hash function takes any input data and produces a fixed-size string of characters (the hash or digest). The same input always produces the same hash, but even a tiny change in input creates a completely different output. Hash functions are one-way — you cannot reverse a hash back to the original data.
What's the difference between MD5, SHA-1, and SHA-256?
MD5 produces a 128-bit (32-character hex) hash and is the fastest but considered cryptographically broken — fine for checksums, not for security. SHA-1 produces a 160-bit (40-char) hash and is also deprecated for security use. SHA-256 (part of SHA-2) produces a 256-bit (64-char) hash and is the current standard for security, digital signatures, and blockchain.
Does this tool upload my data anywhere?
No. All hashing is performed entirely in your browser using the Web Crypto API and JavaScript. Nothing is sent to any server — your data stays on your device and disappears when you close the page.
Can I hash files (images, PDFs, etc.)?
Yes. Click 'Upload File' to select any file. It will be read in your browser and hashed locally. This is useful for verifying file integrity, comparing downloads, or generating checksums.
Can I reverse a hash back to the original text?
No. Cryptographic hash functions are designed to be one-way. You cannot mathematically reverse a hash. Tools that 'crack' hashes work by comparing against huge databases of pre-computed hashes (rainbow tables), not by reversing the algorithm.
Which hash algorithm should I use?
For file integrity checks and checksums, MD5 or SHA-256 both work well. For security purposes (password hashing, digital signatures, certificates), always use SHA-256 or SHA-512. Avoid MD5 and SHA-1 for anything security-related as they have known collision vulnerabilities.
Does it handle Unicode and emoji?
Yes. The tool converts text to UTF-8 bytes before hashing, so all Unicode characters — including emoji, accented letters, CJK characters, and special symbols — are handled correctly and produce consistent, standards-compliant hashes.
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