Generate HMAC signatures with SHA-1, SHA-256, SHA-384, or SHA-512. Hex and Base64 output. Web Crypto API powered.
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Generate HMAC (Hash-based Message Authentication Code) signatures using the Web Crypto API — entirely in your browser.
HMAC combines a cryptographic hash function with a secret key to produce a message authentication code. Unlike plain hashes (MD5, SHA-256), HMACs prove both data integrity AND authenticity — the message hasn't been tampered with, and it came from someone who knows the secret key.
Validate, prettify, and minify JSON data instantly in your browser. No data leaves your device.
Remove emails, phone numbers, and PII from text before pasting into AI tools. Safe AI prompting made easy.
Encode text to Base64 or decode Base64 strings instantly. Useful for API tokens, data URIs, and debugging.
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Visual CSS Grid layout generator. Define rows, columns, gaps, and template areas with instant code output.
Build markdown tables visually with a spreadsheet-like editor. Add rows, columns, and alignment with live preview.