WebP to JPEG Converter

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Updated: 2026-07-11
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Drop WebP images here or click to select files

Multiple files supported β€’ 100% local processing β€’ No upload

90

About WebP to JPEG Converter

This free online WebP to JPEG converter lets you quickly convert WebP images to JPEG format. All processing happens in your browser β€” no files are uploaded to any server. You can adjust the JPEG compression quality to find the perfect balance between file size and image quality.

Why Convert WebP to JPEG?

Features

FAQ

Does this tool upload my images to a server?

Absolutely not. This converter runs entirely in your browser using HTML5 Canvas technology. Your images are never uploaded to any server β€” all processing is done locally.

Which is better, WebP or JPEG?

WebP is typically 25-35% smaller than JPEG while maintaining similar visual quality, making it ideal for modern websites. JPEG has the widest compatibility and is supported by all devices and software. Choose based on your specific use case.

What happens to transparent backgrounds?

JPEG format doesn't support transparency, so transparent areas in WebP become white in the converted JPEG. If you need to preserve transparency, consider converting to PNG instead.

Can I batch convert multiple WebP files?

Yes. Select multiple WebP files or drag and drop them. The tool will batch convert all files to JPEG, and you can download each one individually or all at once.

How do I adjust the output quality?

Use the quality slider (default 90%). 85-95% provides an excellent balance between visual quality and file size. Quality below 70% may show visible compression artifacts.

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const dropZone = document.getElementById('dropZone'); const fileInput = document.getElementById('fileInput'); const qualitySlider = document.getElementById('qualitySlider'); const qualityVal = document.getElementById('qualityVal'); const convertBtn = document.getElementById('convertBtn'); const clearBtn = document.getElementById('clearBtn'); const downloadAllBtn = document.getElementById('downloadAllBtn'); const previewGrid = document.getElementById('previewGrid'); const resultsSection = document.getElementById('resultsSection'); const statusBar = document.getElementById('statusBar'); let files = []; let results = []; function showStatus(msg, type) { statusBar.className = 'status-bar ' + type; statusBar.textContent = msg; } function hideStatus() { statusBar.className = 'status-bar'; statusBar.textContent = ''; } qualitySlider.addEventListener('input', function() { qualityVal.textContent = this.value; }); dropZone.addEventListener('click', function() { fileInput.click(); }); dropZone.addEventListener('dragover', function(e) { e.preventDefault(); dropZone.classList.add('dragover'); }); dropZone.addEventListener('dragleave', function() { dropZone.classList.remove('dragover'); }); dropZone.addEventListener('drop', function(e) { e.preventDefault(); dropZone.classList.remove('dragover'); handleFiles(e.dataTransfer.files); }); fileInput.addEventListener('change', function() { handleFiles(this.files); }); function handleFiles(newFiles) { const valid = []; for (let f of newFiles) { if (f.type === 'image/webp') valid.push(f); } if (valid.length === 0) { showStatus('Please select WebP image files', 'error'); return; } files = files.concat(valid); showStatus(files.length + ' WebP file(s) selected', 'info'); convertBtn.disabled = false; clearBtn.disabled = false; } convertBtn.addEventListener('click', function() { if (files.length === 0) return; convertBtn.disabled = true; results = []; previewGrid.innerHTML = ''; resultsSection.classList.remove('show'); hideStatus(); const quality = parseInt(qualitySlider.value) / 100; let processed = 0; files.forEach(function(file) { const reader = new FileReader(); reader.onload = function(e) { const img = new Image(); img.onload = function() { const canvas = document.createElement('canvas'); canvas.width = img.width; canvas.height = img.height; const ctx = canvas.getContext('2d'); ctx.fillStyle = '#FFFFFF'; ctx.fillRect(0, 0, canvas.width, canvas.height); ctx.drawImage(img, 0, 0); const dataUrl = canvas.toDataURL('image/jpeg', quality); const size = Math.round(dataUrl.length * 0.75); results.push({name: file.name.replace(/\.webp$/i, '.jpg'), dataUrl: dataUrl, size: size}); processed++; if (processed === files.length) showResults(); }; img.src = e.target.result; }; reader.readAsDataURL(file); }); }); function showResults() { resultsSection.classList.add('show'); previewGrid.innerHTML = ''; results.forEach(function(r, i) { const card = document.createElement('div'); card.className = 'preview-card'; const sizeStr = r.size > 1024*1024 ? (r.size/1024/1024).toFixed(1)+' MB' : (r.size/1024).toFixed(1)+' KB'; card.innerHTML = ''+r.name+'
'+r.name+'
'+sizeStr+'
'; previewGrid.appendChild(card); }); downloadAllBtn.style.display = results.length > 1 ? 'inline-block' : 'none'; showStatus('Conversion complete! '+results.length+' file(s)', 'success'); convertBtn.disabled = false; } window.downloadFile = function(dataUrl, name) { const a = document.createElement('a'); a.href = dataUrl; a.download = name; a.click(); }; downloadAllBtn.addEventListener('click', function() { results.forEach(function(r) { const a = document.createElement('a'); a.href = r.dataUrl; a.download = r.name; setTimeout(function() { a.click(); }, 100); }); }); clearBtn.addEventListener('click', function() { files = []; results = []; previewGrid.innerHTML = ''; resultsSection.classList.remove('show'); hideStatus(); convertBtn.disabled = true; clearBtn.disabled = true; downloadAllBtn.style.display = 'none'; fileInput.value = ''; }; })();