Are my images uploaded to a server?

No. The entire conversion runs inside your browser using the HTML5 Canvas API. Your image never leaves your device.

What input formats are supported?

JPG, JPEG, and PNG files are all supported as input. The output is always a WebP file.

What quality setting should I use?

Quality 80–85 is the sweet spot for most photos — visually near-lossless at significantly smaller file sizes than JPG. For high-detail or text-heavy images, 90+ is safer. For thumbnails or previews, 70–75 is acceptable.

Why is the WebP sometimes larger than the original?

Simple images with flat colors or very low-quality JPGs can occasionally produce a larger WebP at high quality settings. Try lowering the quality slider to achieve a smaller output.

Is there a file size limit?

The limit is your browser's available memory, typically several hundred megabytes. Very large images over 30 megapixels may be slow to process on low-end devices.

Do all browsers support WebP?

WebP is supported by all modern browsers — Chrome, Edge, Firefox, and Safari (version 14+). WebP encoding via Canvas is available in Chrome, Edge, and Firefox 96+.

JPG to WebP Converter

Upload a JPG or PNG, adjust the quality slider, and download the WebP — all processed locally in your browser, nothing sent to a server.

Upload Image

Click or drag an image here

JPG, JPEG, and PNG files supported

WebP Quality

1 — smallest 100 — best

Preview (WebP output)

Upload a JPG or PNG to see the WebP preview

Adjust quality to compare sizes in real time

Downloaded!

Summary

This tool converts JPG and PNG images to WebP format entirely inside your browser using the HTML5 Canvas API. No files are ever uploaded to any server — all processing happens on your device. WebP typically delivers 25–35% smaller files than JPG at equivalent visual quality. Use the quality slider to balance image clarity against file size and see a live size comparison before downloading.

How it works

Select or drag a JPG, JPEG, or PNG image onto the upload area.
Adjust the WebP quality slider (1–100, default 85) to your preference.
The preview and estimated output size update instantly.
Review the before/after file size comparison.
Click "Download WebP" to save the converted image.

Use cases

Shrink large JPG photos for faster web page loads.
Convert product images to WebP for e-commerce performance gains.
Reduce image weight for Core Web Vitals improvement.
Prepare design exports for modern browsers that support WebP.
Optimize hero images and banners without losing visual quality.
Preview different quality levels before final export.
Process images privately without uploading to a third-party service.
Convert PNG screenshots to WebP for smaller file sizes.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu