Webp Converter
Webp Converter — runs in your browser. Inputs are not stored.
WEBP converter
Enter values, then press Calculate.
Conversion is in the browser only. The original is not sent to the server.
How to use
- In Image, choose a JPG, PNG, or other image file. Non-images are ignored. Original size may show first.
- Set the Quality slider between 0.5 and 1. Default 0.8, step 0.05. The number is reflected on the label immediately.
- Press Convert. After drawing on a canvas, the browser WEBP encoder creates the file. The file is not uploaded.
- Compare original size with WEBP size and save with Download. The file name keeps the original name and changes only the extension to .webp.
- If the browser does not support WEBP encoding, convert and download are blocked and a notice appears. You can change quality and convert again.
Key concepts
WEBP is a lossy and lossless image format often used on the web. This tool reads the chosen file as a picture, then re-encodes it from a canvas as image/webp. Quality runs from 0.5 (smaller) to 1 (larger). Lossy compression means pixels may not match the original exactly. Transparent PNG background handling can vary by browser implementation.
Conversion is local only; the original never goes to a server. Very large photos can hit a memory limit. For resizing use the image resizer; to shrink other formats use the image compressor. It uses a modern browser’s canvas toBlob. Encoding support is probed on a small canvas first; on failure, download is hidden. The quality label updates as you move the slider, so you can set the value you want before converting.
Example
Pick a 2MB photo.jpg and convert at quality 0.8: original 2.00MB appears next to a WEBP of a few hundred KB. Download names it photo.webp. Lowering quality to 0.5 shrinks size further and can roughen edges. Raising it toward 1.0 increases size. Older browsers that cannot encode show an unsupported notice instead of completion. Right after you pick a file, only original size is shown; after you set quality and press Convert, WEBP size and the download button appear. Picking another photo hides the previous download link and reads the new picture.
Related: Image resizer · Image compressor
Frequently asked questions
Is the file uploaded when converting to WEBP?
No. Conversion happens only on the canvas.
What is the default quality?
0.8. You can adjust from 0.5 to 1 in 0.05 steps.
Does it work in every browser?
It runs in modern browsers that support WEBP encoding. Unsupported browsers show a notice.
Is GIF animation kept?
This version draws a still frame. Animation is not preserved.
Does original resolution shrink?
It does not resize. It draws the original width and height on the canvas.
What is the download file name?
Only the extension of the original file name is changed to .webp.
Last reviewed: 2026-09-04