Trình tạo HMAC
Trình tạo HMAC miễn phí. Tạo chữ ký HMAC với SHA-1, 256, 384 hoặc 512 và bất kỳ khóa bí mật nào. Đầu ra Hex và Base64. Để ký webhook, xác thực API.
Runs in your browserUpdated Apr 26, 2026
Input
Output
Hex
Base64
Các câu hỏi thường gặp
›What is HMAC?
Hash-based Message Authentication Code — a way to verify a message hasn't been tampered with using a shared secret. Common in webhook signing.
›Is HMAC encryption?
No — HMAC is authentication. The message itself is in cleartext; HMAC just lets the receiver verify it came from someone with the same secret.
›Which algorithm should I use?
HMAC-SHA256 is the modern default. HMAC-SHA1 is still common in older systems but should be avoided for new work.
›Is my secret sent to a server?
No — generation runs entirely in your browser via the Web Crypto API.
›Is the generator free?
Yes — fully free, no signup.