ALL DEVELOPER TOOLS56
Hash Generator
Hash Generator — SHA-256, SHA-512, MD5 & More
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or a file, entirely in your browser.
About Hash Generator
Cryptographic hashes are one-way functions that produce a fixed-length fingerprint of any input data. They are fundamental to data integrity verification, password storage, digital signatures, and blockchain technology. This tool generates hashes using four widely used algorithms: SHA-1 and SHA-256 (the most common for checksums and general use), SHA-512 (maximum security), and MD5 (legacy compatibility and quick checksums). SHA-1, SHA-256, and SHA-512 are computed using the browser's native Web Crypto API for maximum performance, while MD5 uses the js-md5 library. You can hash text input directly or upload files to compute their checksum. File hashing is particularly useful for verifying software downloads — compare the hash against the one published by the developer to confirm the file has not been tampered with or corrupted during download. Other common use cases include generating content fingerprints for deduplication, creating deterministic identifiers from strings, and verifying data integrity after transfer.
Questions
Is my data sent to a server?
No. SHA hashes are computed using the Web Crypto API and MD5 using the js-md5 library — both run entirely in your browser.
Which hash algorithm should I use?
SHA-256 is the most widely used for checksums and data integrity. SHA-512 provides more security. MD5 and SHA-1 are considered cryptographically broken and should only be used for non-security purposes like checksums.
Can I verify a downloaded file's checksum here?
Yes. Paste or drop the file into the input area, pick the algorithm the publisher specified (usually SHA-256), and compare the resulting hash against their published value. Matching hashes mean the file was not tampered with in transit.
Can I hash large files?
Yes, and there is no size at which it stops working. The file is handed to a background worker and hashed as it is read, in chunks off the file stream, so it is never held in memory whole — the page stays responsive and a progress bar tracks the work. What a large file costs is time: all four digests are computed in JavaScript at roughly 40 MB a second together, measured in the browser. That is slower than the browser's own crypto, which this page used until September 2026, and it is the trade that removed the ceiling — the native digest has one entry point and it takes the entire file at once, so it cannot be streamed.
Why doesn't my hash match the one from my terminal?
Almost always a trailing newline — echo appends one, so piping 'hello' through it hashes six bytes while this tool hashes exactly the five characters you typed, encoded as UTF-8. Use printf or echo -n in the terminal to compare like for like.
Is my file uploaded to a server?
No. Transmute processes everything locally in your browser using JavaScript and WebAssembly. Your files never leave your device — there is no server, no upload, no cloud processing.