Image optimization and format conversion
Upload multiple images, resize them together, convert them to WebP when needed, review before-and-after size changes, and download the processed result as ZIP without leaving the browser.
Set images and output conditions on the left, review the results on the right, then download the processed batch as ZIP when it looks ready.
Select multiple jpg, jpeg, png or webp files, or drag and drop them here.
Images stay in the browser. Resizing, conversion and ZIP generation all run locally.
Output format
Lower values usually make the file smaller. This mostly affects jpg and webp output.
WebP is a web-friendly image format that often reduces file size while keeping images visually usable. If you are unsure, try WebP first and compare the result.
Image processing and ZIP generation stay inside this browser. The site does not include a mechanism that sends these tool inputs for AI training.
Higher quality usually keeps more detail, but it also tends to increase the output file size.
Output filenames keep the original base name and add your prefix or suffix. The extension changes automatically when you convert to WebP.
Processing settings
Add multiple images first and the before-and-after information will appear here.
Select multiple jpg, jpeg, png or webp files, or drag and drop them into the page.
Set width, height, aspect-ratio, output format, quality and filename prefix or suffix as needed.
Compare original size, output size and estimated reduction for each image and check for any issues.
When the batch looks ready, save the processed images together in one ZIP file.
Before
photo01.jpg 4.8MB 4000×3000 photo02.png 2.1MB 2400×1600
After
photo01-web.webp 420KB 1600×1200 photo02-web.webp 310KB 1600×1067
Note: This example sets the width to 1600px and keeps the aspect ratio while converting the batch to WebP.
Before
hero.jpg 3.2MB 3200×1800
After
project-hero-optimized.jpg 690KB 1800×1013
Note: The format stays the same while the image is resized and the output name gets a prefix and suffix.
No. The tool is designed to resize, convert and zip images locally in the browser.
WebP is an image format often used on websites because it can keep images fairly clear while reducing file size compared with older formats in many cases.
Yes. Choose `Keep original format` if you want to resize images without changing jpg, png or webp output type.
Added the batch image resize and WebP conversion tool with local ZIP download support.
Added resize controls, quality settings and before-and-after size comparison.