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FeuTex · free tools runs in-browser no bloat built by LiMiT

Hash Tool Online

Generate cryptographic hashes directly in your browser (no uploads). Supports SHA-256, SHA-1, SHA-384, and SHA-512, with output in hex or Base64. You can hash plain text (UTF-8), raw hex bytes, or a file.

Category: Developer · URL: /tools/hash-tool-online.html
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Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Use this tool to generate hashes locally in your browser.

  1. Choose Input type: Text (UTF-8) or Hex bytes.
  2. Paste into the input box, or pick a file (file takes priority).
  3. Select an algorithm (or enable All).
  4. Choose output format (Hex/Base64), then click Hash.
  5. Click Copy to copy the result.
Keywords this page targets (natural cluster): hash tool online, sha256 hash online, sha1 hash generator, sha512 hash online, sha384 hash generator, hash text online, hash a file online, web crypto hash, convert text to sha256, generate sha256 checksum, hash hex bytes, sha256 base64, sha256 hex, checksum calculator sha256, online hash calculator, verify sha256 hash, compute sha256 in browser, sha1 vs sha256 hash
Secondary intents covered: Compute a SHA-256/SHA-1/SHA-384/SHA-512 hash for a string, Hash a file locally to get a checksum, Hash raw bytes by pasting a hex string, Switch between hex and Base64 output formats, Compare a known hash with a newly computed one, Copy the hash result quickly for scripts or CI logs, Troubleshoot mismatched hashes caused by whitespace/encoding, Generate multiple hashes (several algorithms) for the same input, Confirm the page supports Web Crypto (crypto.subtle) before relying on results

FAQ

Is this hash tool really “online” if it runs in the browser?

The page is online, but hashing runs locally in your browser using the Web Crypto API—your input isn’t uploaded by the tool.

Which algorithms are supported?

SHA-256, SHA-1, SHA-384, and SHA-512 (via crypto.subtle.digest).

Can I generate an MD5 hash here?

No—this tool focuses on Web Crypto algorithms and doesn’t include MD5.

Why does my hash not match another tool?

Most mismatches come from different input bytes (newlines, hidden spaces, encoding). Try toggling newline normalization and verify the exact text/bytes.

What’s the difference between Hex and Base64 output?

They represent the same hash bytes. Hex is common for checksums; Base64 is shorter and often used in APIs.

Can I hash a file to get a checksum?

Yes—choose a file and click Hash. The tool reads the file locally and outputs the selected digest(s).

Is SHA-1 safe to use?

SHA-1 is considered weak for collision resistance; use SHA-256 or stronger for security-sensitive use cases.