Convert PNG to WebP Online — Free & Instant
WebP is the recommended format for PNG replacement on the web — it achieves 26% better compression than PNG at equivalent quality while preserving full transparency (alpha channel). Converting your PNGs to WebP before uploading to a website is one of the most effective ways to reduce page weight and improve Google PageSpeed scores. This tool does it entirely in your browser — your files never leave your device.
Quick Answer
WebP is the recommended format for PNG replacement on the web — it achieves 26% better compression than PNG at equivalent quality while preserving full transparency (alpha channel). Converting your PNGs to WebP before uploading to a website is one of the most effective ways to reduce page weight and improve Google PageSpeed scores.
Try it now — free, no signup
Your images stay on your device. Nothing is uploaded to any server.
Step-by-Step Guide
5 steps · takes under 1 minute
Open the Format Converter
Go to the Convert from JPG tool — it accepts PNG, JPG, WebP, and other formats as input, and can output WebP.
Upload your PNG
Drag and drop your .png file onto the upload zone. The browser reads PNG natively and processes it instantly. Transparency (alpha channel) is detected and preserved automatically.
Select WebP as output format
Choose WebP from the output format selector. The tool uses the browser's built-in WebP encoder for fast, high-quality conversion.
Set quality to 80–85%
WebP at 80% quality is visually equivalent to PNG lossless for most images, at a fraction of the file size. For images with fine detail or text, use 85%. For thumbnails and background images, 75% is sufficient.
Download and use your WebP
Your WebP file downloads directly to your device. Upload it to your website, CMS, or platform. All modern browsers (Chrome, Firefox, Safari 14+, Edge) display WebP natively.
100% Private — Zero Uploads
ImgToolkit runs entirely in your browser using the Canvas API. Your images are never sent to a server, never stored in the cloud, and never seen by anyone else. This makes it safe for sensitive documents, client work, medical imagery, and confidential screenshots.
Pro tip
Always keep your original file before converting. Lossy formats like JPG discard data permanently — you can't restore quality that was compressed away.
WebP vs JPG vs PNG — Real File Sizes
Same 1080×1080px photo at equivalent visual quality
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (lossless) | Perfect | 4.2 MB | No compression loss |
| JPG (85% quality) | Excellent | 310 KB | Best compatibility |
| WebP (85% quality)BEST | Excellent | 205 KB | −34% vs JPG · Best for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
Related Free Tools
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Frequently Asked Questions
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Free, instant — your files stay on your device. Always.
Convert PNG to WebP Free