This tool runs only in your browser. It does not upload your input anywhere.
Security note: SHA-1 is broken for collision resistance. Prefer SHA-256 or SHA-512 for integrity checks.
Tip: “Share link” stores your input in the URL hash so you can reopen the same hash later.
SHA-1 calculator — Compute SHA-1 for a text input locally in your browser (hex + Base64). Copy results or share a link. Includes a security warning. Browser-only MVP.
Example: Use this tool to sanity-check numbers quickly, then share the link if you need to discuss with others.
FAQ: (1) Does it upload my data? No—runs in your browser. (2) Can I share results? Yes—use the share link feature. (3) Is it authoritative? Treat it as a convenience, not professional advice.
SHA-1 計算器 — 在本機計算文字的 SHA-1（hex + Base64）。可複製結果或分享連結；並附安全提醒。純前端 MVP。
範例：用這個工具快速試算與對照結果，需要討論時再把連結分享給對方。
FAQ： (1) 會上傳資料嗎？不會，計算在瀏覽器內完成。 (2) 能分享結果嗎？可以，用分享連結。 (3) 準確嗎？請把它當作便利工具，不是專業建議。