Compute MD5, SHA-1, SHA-256, SHA-512 of text or files. MD5 via pure-JS; SHA family via SubtleCrypto. Runs entirely in your browser.
// HMAC authenticates — only someone with the secret can produce a valid digest of your message. Used in Stripe, GitHub, and Slack webhook signatures.
Generate a QR code from any URL or text. Download as SVG. Runs entirely in your browser.
Pretty-print, minify, and validate JSON. Identifies the exact line and column of any syntax error.
Measure entropy in bits, estimate brute-force time, and see what's weakening your password.
Compute MD5, SHA-1, SHA-256, SHA-512 of text or files. MD5 via pure-JS; SHA family via SubtleCrypto. Runs entirely in your browser.
// HMAC authenticates — only someone with the secret can produce a valid digest of your message. Used in Stripe, GitHub, and Slack webhook signatures.
Generate a QR code from any URL or text. Download as SVG. Runs entirely in your browser.
Pretty-print, minify, and validate JSON. Identifies the exact line and column of any syntax error.
Measure entropy in bits, estimate brute-force time, and see what's weakening your password.