Compress PDF Online — Free, Instant, Private

let _file=null; function ev(e){e.preventDefault();} function handleFile(f){ if(!f||!f.name.endsWith('.pdf')){alert('Please select a PDF file');return;} _file=f; document.getElementById('fl1').innerHTML=``; document.getElementById('opts1').style.display='flex'; document.getElementById('act1').style.display='flex'; document.getElementById('res1').classList.remove('show'); } function resetTool(){_file=null;document.getElementById('fl1').innerHTML='';document.getElementById('opts1').style.display='none';document.getElementById('act1').style.display='none';document.getElementById('res1').classList.remove('show');document.getElementById('prog1').style.display='none';} async function compressPDF(){ if(!_file)return; const btn=document.getElementById('compbtn');btn.disabled=true; document.getElementById('prog1').style.display='block'; const setP=(p,t)=>{document.getElementById('pf1').style.width=p+'%';document.getElementById('pl1').textContent=t;}; setP(20,'Loading PDF...'); const ab=await _file.arrayBuffer(); setP(50,'Compressing...'); const doc=await PDFLib.PDFDocument.load(ab,{ignoreEncryption:true}); const out=await doc.save({useObjectStreams:true}); setP(100,'Done!'); const orig=_file.size,nw=out.byteLength,saved=orig-nw,pct=((saved/orig)*100).toFixed(1); document.getElementById('r1orig').textContent=fmtSize(orig); document.getElementById('r1new').textContent=fmtSize(nw); document.getElementById('r1saved').textContent=(saved>0?`-${fmtSize(saved)} (${pct}%)`:'Already optimised'); document.getElementById('res1').classList.add('show'); const blob=new Blob([out],{type:'application/pdf'}); const url=URL.createObjectURL(blob); document.getElementById('dlbtn').onclick=()=>{const a=document.createElement('a');a.href=url;a.download='compressed-'+_file.name;a.click();}; btn.disabled=false; setTimeout(()=>{document.getElementById('prog1').style.display='none';},800); }