({text = 'Hello, World!', uppercase = 'lower'}) => { const K = [0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2]; const H = [0x6a09e667,0xbb67ae85,0x3c6ef372,0xa54ff53a,0x510e527f,0x9b05688c,0x1f83d9ab,0x5be0cd19]; const rr = (v,n) => (v>>>n)|(v<<(32-n)); const msg = unescape(encodeURIComponent(String(text))); const bytes = Array.from(msg).map(c=>c.charCodeAt(0)); const L = bytes.length*8; bytes.push(0x80); while(bytes.length%64!==56) bytes.push(0); for(let i=7;i>=0;i--) bytes.push((L/Math.pow(2,i*8))&0xff); const h = H.slice(); for(let i=0;i>>3); const s1=rr(w[j-2],17)^rr(w[j-2],19)^(w[j-2]>>>10); w.push((w[j-16]+s0+w[j-7]+s1)>>>0); } let [a,b,c,d,e,f,g,hh]=h.slice(); for(let j=0;j<64;j++){ const S1=rr(e,6)^rr(e,11)^rr(e,25); const ch=(e&f)^(~e&g); const t1=(hh+S1+ch+K[j]+w[j])>>>0; const S0=rr(a,2)^rr(a,13)^rr(a,22); const maj=(a&b)^(a&c)^(b&c); const t2=(S0+maj)>>>0; hh=g;g=f;f=e;e=(d+t1)>>>0;d=c;c=b;b=a;a=(t1+t2)>>>0; } const add=(x,y)=>(x+y)>>>0; h[0]=add(h[0],a);h[1]=add(h[1],b);h[2]=add(h[2],c);h[3]=add(h[3],d);h[4]=add(h[4],e);h[5]=add(h[5],f);h[6]=add(h[6],g);h[7]=add(h[7],hh); } const hex = h.map(v=>v.toString(16).padStart(8,'0')).join(''); return uppercase==='upper'?hex.toUpperCase():hex; }

SHA-256 Hash Generator vs Bulk UUID v4 Generator

SHA-256 Hash Generator

Bulk UUID v4 Generator