Generate Hashes for API Request Signing

Understand HMAC signing by computing the hash of your API payload before sending signed requests.

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Tip: SHA-256 and SHA-512 are cryptographically secure. SHA-1 is legacy and no longer recommended for security-sensitive use. All hashing runs locally in your browser — files and text are never sent anywhere.

API Signing tips

✍️

Many APIs (AWS, Stripe, Twilio) use HMAC-SHA256 to sign requests. The signature is a hash of the request body combined with your secret key.

💡

Use this tool to verify what your request payload's raw SHA-256 hash looks like before the HMAC layer is applied.

🔍

If your signed request is being rejected, hash the raw payload here and compare it to what your signing implementation produces.

📋

Webhook providers like GitHub send an X-Hub-Signature-256 header. Compute the SHA-256 hash of the raw webhook body to verify it matches.

Paano ito Gumagana

Ilagay

Enter your data into the tool above. Everything stays local to your browser.

Iproseso

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

I-download

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Bakit gamitin ang aming kasangkapan?

✓Ganap na libre — walang nakatagong bayad, kailanman

✓Walang kinakailangang account, email, o login

✓Ang mga file ay hindi kailanman lumalabas sa iyong device

✓Walang anumang limitasyon sa laki ng file

✓Walang watermark sa anumang output

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✅

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🔒

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🔁

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🔐

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