Safe Local Tools

Free Hash generator

Choose SHA-256 (recommended), SHA-384, SHA-512, or legacy SHA-1. Text is encoded as UTF-8 before hashing. Output is a continuous lowercase hex string. On insecure origins (some local URLs) Web Crypto may be unavailable — use HTTPS or localhost. Nothing leaves this tab.

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How to use this tool

  1. 1

    Open Hash generator

    Use it for this task: SHA-256, SHA-384, SHA-512, SHA-1 hashes, Web Crypto support, lowercase hex output - 100% local.

  2. 2

    Add the source text

    Paste the content you want to process and choose the algorithm or output style.

  3. 3

    Copy the generated value

    Use the generated hash or result for checksums, comparisons, or documentation.

Quick facts

Runs offline?Yes — after this page loads, hashing uses only your browser’s Web Crypto implementation.
MD5?MD5 is not exposed by Web Crypto in browsers here. Prefer SHA-256 or SHA-512 for new designs.
Is data uploaded?No. Safe Local Tools is static; your text never leaves this tab.
File hashing?This version hashes UTF-8 text only. For large files, use a desktop CLI or a dedicated file-hash tool.

Top use cases

  1. SHA-256, SHA-384, SHA-512, SHA-1 hashes, Web Crypto support, lowercase hex output - 100% local.
  2. Runs offline?: Yes — after this page loads, hashing uses only your browser’s Web Crypto implementation.
  3. MD5?: MD5 is not exposed by Web Crypto in browsers here. Prefer SHA-256 or SHA-512 for new designs.
  4. Is data uploaded?: No. Safe Local Tools is static; your text never leaves this tab.
  5. File hashing?: This version hashes UTF-8 text only. For large files, use a desktop CLI or a dedicated file-hash tool.

FAQ

Why is SHA-1 marked legacy?▾

SHA-1 is no longer considered collision-resistant for security-sensitive signatures. It remains available for compatibility checks only — prefer SHA-256 or stronger for new work.

Does newline or trailing space matter?▾

Yes — hashing is byte-exact. A trailing newline is a different input than the same line without it.

Is this HMAC?▾

No — this page computes plain digests of UTF-8 bytes. HMAC needs a secret key and a different construction.

Can I hash binary pasted as Base64?▾

Not directly — the input box treats content as text (UTF-8). Decode Base64 to bytes elsewhere, or use the Base64 file tool for byte workflows.

Will the same text always produce the same digest?▾

Yes for a fixed algorithm and UTF-8 input. Changing the algorithm or any character (including invisible Unicode) changes the digest.

Where are secrets processed?▾

Only in your browser memory for this session. Clear the tab or reload when you are finished.