Hash Generator – MD5, SHA-1, SHA-256, SHA-512 Online
Generate cryptographic hashes from text or files directly in your browser using the Web Crypto API. Supports MD5, SHA-1, SHA-256, and SHA-512 — all computed locally with zero data transmission.
Input Text or File
Drag & Drop a file here or click to select
Your file stays on your device — never uploaded anywhere.
Hash Results
Why Use Tools Oasis Hash Generator?
Tools Oasis computes cryptographic hashes securely and instantly in your browser using the Web Crypto API. Perfect for verifying file integrity, generating checksums, or testing hash algorithms.
Algorithm strength
MD5 and SHA-1 are legacy (fast to crack). SHA-256 and SHA-512 are the current security standards.
Web Crypto API
Uses crypto.getRandomValues() — cryptographically secure, not the predictable Math.random().
Zero Transmission
Values are generated client-side and never sent, logged, or stored anywhere.
No Limits
Generate as many results as you need, for free, with no rate limits.
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Try NordPass — Free Password ManagerFrequently Asked Questions
01 What hash algorithms are supported?
Tools Oasis supports four algorithms: MD5, SHA-1, SHA-256, and SHA-512. SHA-256 and SHA-512 are computed using the Web Crypto API; MD5 uses a trusted JavaScript implementation.
02 Is the hashing done on a server?
No. All hash computation happens entirely in your browser. Your text and files are never uploaded, transmitted, or stored anywhere.
03 Can I hash files with this tool?
Yes. Simply drag and drop any file onto the upload area, and Tools Oasis will compute MD5, SHA-1, SHA-256, and SHA-512 hashes from the file's contents.
04 What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit hash and is considered cryptographically broken for security purposes, but still useful for checksums. SHA-256 produces a 256-bit hash and is widely used for security, digital signatures, and blockchain.
05 Can I use this to verify file integrity?
Absolutely. Download a file, drop it here, and compare the computed hash with the one provided by the source. If they match, the file is intact and unmodified.
06 Does the tool work offline?
Yes. Once the page has loaded, you can generate hashes for text and files without an internet connection.
More Questions About Hashing
01 What is hashing and how does it work?
Hashing is a one-way mathematical function that converts any input (text or file) into a fixed-length string of characters called a hash or digest. The same input always produces the same hash, but even a tiny change in the input produces a completely different output.
02 What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit hash and is considered cryptographically broken — it should not be used for security, but is still useful for checksums and data deduplication. SHA-256 produces a 256-bit hash and is widely used for security, digital signatures, and blockchain applications.
03 Can I reverse a hash to get the original text?
No. Hashing is a one-way function by design — you cannot mathematically reverse a hash back to the original input. While rainbow tables can match known hashes to common inputs, secure hashing algorithms like SHA-256 with unique inputs are practically irreversible.
04 What are common use cases for hashing?
Hashing is used for verifying file integrity after downloads, storing passwords securely in databases, digital signatures, data deduplication, blockchain transactions, and generating unique identifiers for content.