All hashes generated instantly
Or Hash a File
Drop file here or click to browse
Max 100MB
Hash Outputs
MD5(insecure)
Enter text or drop a file
SHA-1(weak)
Enter text or drop a file
SHA-256
Enter text or drop a file
SHA-512
Enter text or drop a file
Generate cryptographic hashes instantly with this free online tool. Supports MD5, SHA-1, SHA-256, and SHA-512 algorithms. Compute all hash values at once from text or files. All processing happens in your browser — your data never leaves your device.
A cryptographic hash function is a mathematical algorithm that transforms any input data into a fixed-size string of characters (the hash or digest). Key properties include: deterministic (same input always produces the same output), one-way (impossible to reverse),collision-resistant (extremely hard to find two different inputs with the same hash), and avalanche effect (small input changes create completely different hashes). Common uses include file integrity verification, password storage, digital signatures, and data deduplication.
MD5 is cryptographically broken and should never be used for security purposes. Collision attacks can generate different inputs with identical MD5 hashes in seconds. However, MD5 is still acceptable for non-security uses like checksums, cache keys, or fingerprinting.
SHA-1 is deprecated for security use. While harder to attack than MD5, practical collisions have been demonstrated. Use SHA-256 or higher for any security-sensitive application.
SHA-256 and SHA-512 are currently considered secure for all purposes. SHA-256 is the most widely used, offering excellent security with good performance. SHA-512 provides larger output (512 bits vs 256 bits) and can be faster on 64-bit systems.
Generate hashes in your code using these snippets for popular languages:
Is my data safe using this tool?
Yes, all hashing happens entirely in your browser using JavaScript. Your data never leaves your device and is never sent to any server.
Can I hash large files?
Yes, files up to 100MB are supported. Larger files may cause browser performance issues. For very large files, consider using command-line tools.
Why do all four hashes compute at once?
For convenience. When verifying a file checksum, you might not know which algorithm was used. Computing all at once lets you quickly match against any hash format.
Can I reverse a hash to get the original text?
No. Hash functions are one-way by design. You cannot mathematically reverse a hash. However, common passwords can be found using rainbow tables or brute force.
More DevDen tools: JSON Formatter · Base64 Encoder/Decoder · URL Encoder/Decoder · Unix Timestamp Converter · Regex Tester