Image to WebP Converter
Convert any image (PNG, JPEG, GIF…) to WebP format in your browser. No upload required.
Pure browser JavaScript (HTML canvas) — no upload.
How to use this tool
- Choose any image file.
- Click Download as WebP.
Convert any image (PNG, JPEG, GIF…) to WebP format in your browser. No upload required.
How it works
The Image to WebP Converter converts images in any common format (PNG, JPEG, GIF, BMP, and others) to the WebP format, which typically achieves 25-35% smaller file sizes than JPEG or PNG at comparable visual quality. Select or drop your image, then download the converted .webp file.
WebP is a modern image format developed by Google and now supported by all major browsers (Chrome, Firefox, Safari, Edge). Using WebP on websites reduces page load times and bandwidth usage without sacrificing visual quality.
The conversion runs in your browser via the HTML5 Canvas API. No image data is sent to any server, so your images remain private. The quality slider (if present) controls the WebP encoding quality; 80% is a good default for photos.
WebP supports both lossy and lossless encoding as well as transparency (alpha channel), making it a versatile replacement for both JPEG and PNG in web contexts.
Worked example
Convert a PNG icon to WebP for a website
- Select your PNG icon file.
- Set quality to 90% to preserve crisp edges (or choose lossless if the option is available).
- Click Convert.
- Download the .webp file.
- Replace the PNG reference in your HTML with the .webp filename.
A WebP icon that is 30-50% smaller than the PNG, with identical visual quality for the browser.
Common mistakes to avoid
- Converting a WebP back to PNG and then to WebP again, which compounds lossy quality loss -- always start from the original source file.
- Using WebP for email attachments or documents -- WebP is designed for web use; some email clients and document viewers do not support it.
- Forgetting to update the file extension and src attributes in your HTML or CSS after converting -- browsers determine format partly from the file extension.
Key terms
- WebP
- A modern image format by Google that uses advanced compression to achieve smaller files than JPEG or PNG at equivalent quality, with support for transparency and animation.
- Alpha channel
- The transparency layer in an image; WebP supports alpha transparency, unlike standard JPEG.
- Lossy vs lossless WebP
- Lossy WebP (like JPEG) discards some data for maximum compression; lossless WebP (like PNG) preserves all data but with smaller size gains.
Frequently asked questions
- Does this work with PNGs?
- Yes — any image the browser can load (PNG, JPEG, GIF, BMP) can be converted.