WebP is an image format made for the web: for the same look it usually produces smaller files than
JPEG, and unlike JPEG it can keep transparent areas. This page turns JPEG, PNG, GIF, BMP or TIFF
images into .webp files in bulk, ready for a website, an online shop or a CMS that accepts WebP.
How to convert images to WebP
- Upload the images, or a
.zipof a folder if you want the folder structure back. - Check the size. The form is set to Fit inside 1600 × 1600: anything larger is scaled down until its longest side is 1600 px, and smaller images are left at their size. To keep every image at its original dimensions, set Resize mode to Scale by percentage and enter 100.
- Quality is preset to 80. Use 100 for lossless WebP, which is larger but pixel-exact and suits screenshots, logos and graphics with sharp edges.
- Download the ZIP or single files. Each result keeps its original name with the
.webpextension, sobanner.pngbecomesbanner.webp.
What is kept and what isn't
- Transparency: transparent parts of a PNG stay transparent.
- Orientation: phone photos are rotated upright before converting.
- Camera info and colour profile: not stored. WebP files from this tool contain neither EXIF nor an embedded ICC profile, even if you tick Keep camera info. Ordinary sRGB images look the same; a photo edited in a wide-gamut space such as Adobe RGB may look a little duller, so export it as sRGB first.
- Animation: an animated GIF becomes a still image of its first frame.
- Size limit: WebP allows at most 16,383 px per side.
Tips
- Very small, flat graphics (a logo of a few kilobytes) can come out slightly larger as WebP. Compare the before and after sizes and keep the PNG where it wins.
- For responsive images, run the same batch twice, for example at 800 and at 1600 px, with the
file name pattern
{name}-{w}wunder More options. You getphoto-800w.webpandphoto-1600w.webpfor asrcset.
To make JPEGs smaller without changing their format, use Compress images.
More about what this tool reads and writes: Bulk Image Resizer.