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

Hash Tool Free Download (Offline)

Generate secure hashes locally in your browser and optionally download an offline HTML version to use without internet. Supports SHA-256, SHA-1, SHA-384, and SHA-512 for text and files—no uploads, no installs.

Category: Developer · URL: /tools/hash-tool-free-download.html
Everything runs locally in your browser. No uploads.
Hash Tool Online Regex Tool Online XML Tool YAML Formatter Online JSON Generator from Schema Regex Checker Java
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

This tool runs fully client-side using your browser’s built-in crypto functions.

  1. Select an algorithm (SHA-256 is the common default).
  2. Choose Text or File.
  3. Enter text or pick a file, then click Generate Hash.
  4. Copy the result, or switch output to Base64 if needed.
  5. Use Download Offline HTML to save a portable version you can run locally.
Keywords this page targets (natural cluster): hash tool free download, sha256 hash tool free download, offline hash calculator download, download checksum tool html, sha1 sha256 sha512 offline tool, file hash generator free download, verify file integrity hash tool, hash generator for text offline, sha256 checksum calculator offline, browser hash tool download, portable hash tool no install, client side hashing tool, compute sha256 for file in browser, generate sha512 hash offline, free checksum generator download, hash tool html file download, compare hashes for verification, web crypto hash calculator, sha384 calculator offline, hashing tool without uploading files
Secondary intents covered: Generate a SHA hash for pasted text, Compute a checksum for a local file without uploading it, Verify downloads by comparing expected and computed hashes, Switch between SHA-256, SHA-1, SHA-384, and SHA-512, Copy hash output in hex or Base64, Download a self-contained offline HTML hash tool, Clear/reset the tool quickly between checks, Troubleshoot when hashing is unsupported in a browser

FAQ

Is this hash tool really free to download and use offline?

Yes—use the Download Offline HTML button to save a self-contained file you can run locally without internet.

Do my text or files get uploaded anywhere?

No. Hashing runs entirely in your browser using the Web Crypto API, with no network requests.

Which algorithms are supported?

SHA-256, SHA-1, SHA-384, and SHA-512.

What output formats are available?

You can output hashes as hexadecimal or Base64.

Can I hash large files?

It depends on your browser and device; very large files can be slow or hit memory limits because the file must be read into memory.

Why does my browser say hashing is not supported?

Some browsers or contexts block the Web Crypto API. Use a modern browser and ensure the page is served over HTTPS (or use the downloaded offline file).

How do I verify a download with a checksum?

Compute the hash of the downloaded file and compare it character-for-character with the hash published by the source.

`; } function downloadOfflineHtml() { setError(""); try { const html = buildOfflineHtml(); const blob = new Blob([html], { type: "text/html;charset=utf-8" }); const url = URL.createObjectURL(blob); const a = document.createElement("a"); a.href = url; a.download = "hash-tool-offline.html"; document.body.appendChild(a); a.click(); a.remove(); setTimeout(() => URL.revokeObjectURL(url), 1000); } catch (e) { setError(e && e.message ? e.message : String(e)); } } window.feutexReset = function feutexReset() { setError(""); setMeta(""); const input = $("toolInput"); const output = $("toolOutput"); const alg = $("ftAlg"); const fmt = $("ftFmt"); const file = $("ftFile"); if (input) input.value = ""; if (output) output.value = ""; if (alg) alg.value = "SHA-256"; if (fmt) fmt.value = "hex"; if (file) file.value = ""; const rText = $("ftModeText"); if (rText) rText.checked = true; updateModeUI(); }; window.feutexInit = function feutexInit() { const btnGo = $("ftGo"); const btnCopy = $("ftCopy"); const btnDl = $("ftDownload"); const btnClear = $("ftClear"); const modeText = $("ftModeText"); const modeFile = $("ftModeFile"); if (btnGo) btnGo.addEventListener("click", runHash); if (btnCopy) btnCopy.addEventListener("click", copyOutput); if (btnDl) btnDl.addEventListener("click", downloadOfflineHtml); if (btnClear) btnClear.addEventListener("click", window.feutexReset); if (modeText) modeText.addEventListener("change", updateModeUI); if (modeFile) modeFile.addEventListener("change", updateModeUI); const alg = $("ftAlg"); const fmt = $("ftFmt"); if (alg) alg.addEventListener("change", () => { setError(""); setMeta(""); }); if (fmt) fmt.addEventListener("change", () => { setError(""); setMeta(""); }); updateModeUI(); }; window.feutexSelfTest = async function feutexSelfTest() { const tests = [ { name: "SHA-256 abc (hex)", alg: "SHA-256", input: "abc", fmt: "hex", expected: "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad" }, { name: "SHA-1 abc (hex)", alg: "SHA-1", input: "abc", fmt: "hex", expected: "a9993e364706816aba3e25717850c26c9cd0d89d" }, { name: "SHA-384 abc (hex)", alg: "SHA-384", input: "abc", fmt: "hex", expected: "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7" }, { name: "SHA-512 abc (hex)", alg: "SHA-512", input: "abc", fmt: "hex", expected: "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f" }, { name: "SHA-256 empty string (hex)", alg: "SHA-256", input: "", fmt: "hex", expected: "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855" } ]; let passCount = 0; let failCount = 0; const lines = []; // Basic environment checks if (!window.crypto || !window.crypto.subtle) { return "FAIL: Web Crypto API not available"; } for (const t of tests) { try { const d = await digestText(t.input, t.alg); const got = formatDigest(d, t.fmt); const ok = got === t.expected; if (ok) { passCount++; lines.push(`PASS: ${t.name}`); } else { failCount++; lines.push(`FAIL: ${t.name} (got ${got})`); } } catch (e) { failCount++; lines.push(`FAIL: ${t.name} (error ${e && e.message ? e.message : String(e)})`); } } lines.push(`Result: ${failCount === 0 ? "PASS" : "FAIL"} (${passCount}/${passCount + failCount})`); return lines.join("\n"); }; if (document.readyState === "loading") { document.addEventListener("DOMContentLoaded", window.feutexInit); } else { window.feutexInit(); } })();