Files are processed locally in your browser and never uploaded

Hash Generator

Compute hash values of text or files for integrity checks, download verification, and development testing. Supports SHA-256 / SHA-384 / SHA-512 plus SHA-1 / MD5 for compatibility — all computed locally in your browser; files are never uploaded.

Algorithm

SHA-256 / SHA-384 / SHA-512 are recommended; SHA-1 and MD5 are only for legacy compatibility or basic checksums.

Text Content

Enter content, then click "Compute Hash"

🔒 All data is processed locally in your browser and never uploaded to a server. Files and text are hashed locally; files are never uploaded.

The hash generator computes digest values of text or files locally in your browser. Files are never uploaded, making it suitable for file integrity checks, download verification, and development testing. This guide explains algorithm choice and usage.

What is a hash used for?

A hash maps content of any length to a fixed-length string. Even a tiny change in the content produces a completely different result.

It is therefore commonly used to verify whether a file is complete or has been tampered with, or to compare whether two files are identical.

How to choose an algorithm?

Different algorithms output different lengths with different security strength. The page labels recommended algorithms and compatibility algorithms separately.

SHA-256: the default recommendation, strong enough and the most widely used
SHA-384 / SHA-512: longer output and higher security, suitable for release verification
SHA-1 / MD5: only recommended for legacy system compatibility or non-security scenarios, not for security-related purposes

Text hash and file hash

A text hash computes a digest of a string, for example to verify a config entry or generate test data.

A file hash verifies that a downloaded file matches the official release: the provider publishes the hash value, you compute it locally and compare.

Whether text or file, the computation happens locally in your browser, and file content is never uploaded.

How to verify a downloaded file?

First get the officially published hash (usually SHA-256) and the algorithm from the file provider.

Choose the same algorithm in this tool, upload the file, and compare the result character by character with the official value. An exact match means the file is complete and untampered.

Security tips

MD5 and SHA-1 have known collision attacks and should no longer be used for security scenarios such as signatures or passphrases. They are only for legacy compatibility or simple integrity checks.

For security-related purposes, prefer SHA-256 and above.

FAQ

Are files uploaded?

No. File reading and hash computation happen entirely locally in your browser. File content is never sent to any server.

Why do MD5 and SHA-1 say not recommended for security purposes?

Public collision attack methods exist for these two algorithms, where different content can be constructed to produce the same hash. They are therefore unsuitable for security scenarios like signatures or passphrases and are only recommended for legacy compatibility or ordinary verification.

Is the hash of the same file identical every time?

Yes. Hashing is deterministic: the same content with the same algorithm always yields the same value.

Can multiple algorithms be computed at the same time?

The current version computes one algorithm at a time. Switch the algorithm and recompute to get the corresponding result.

How large a file is supported?

It depends on the memory available to your browser. Common documents and installers compute normally; very large files may be slow on devices with little memory.