Browser-Side Image Resizer for JPG, PNG, and WEBP
Resize images by exact pixels or percentage scale, keep the aspect ratio when needed, and export JPG, PNG, or WEBP files with browser-side controls.
An image resizer changes the pixel width and height of a JPG, PNG, or WEBP file.
This tool is designed for browser-side resizing before uploads, emails, posts, or docs. Avoid using sensitive images unless you have reviewed the implementation.
Use source images with enough pixels
Downscaling usually looks clean. Upscaling can make soft images look softer because it invents extra pixels.
Pick the destination size first
Use exact width and height for product cards, banners, thumbnails, social images, or document inserts.
Drop image here or click to upload
Supported format: JPG / PNG / WEBP, max 15MB
No image uploaded
Mobile processing guidance
On mobile, start with a JPG/PNG/WebP under 10MB and cap output at 1200px or 1600px first.
Max 15MB and output under 36MP.
Large dimensions use browser canvas memory, especially when upscaling or exporting PNG.
If export fails, retry with smaller dimensions, WEBP/JPG output, or lower quality.
Keep width and height proportional while editing either field.
Resize quality note
Upscaling above 100% cannot add real detail and may look soft. Downscale for smaller web images, and keep the aspect ratio locked unless you need an intentional stretch.
Browser-side resize workflow
Resizing is designed for browser-side processing with canvas based on the current public implementation. Avoid entering sensitive images unless you have reviewed the implementation.
Product and marketplace images
Create consistent 800 x 800, 1200 x 1200, or other fixed-size exports before uploading listings.
Social and Open Graph images
Resize visual assets to common preview dimensions before checking or compressing them.
Docs, slides, and email
Reduce very large screenshots before placing them in documents, decks, or emails.
Upscaling small images
Increasing dimensions cannot add real detail. Start with a larger source when the final export needs to stay sharp.
Unlocking aspect ratio casually
Changing width and height independently can stretch faces, products, and logos. Keep aspect ratio on unless distortion is intentional.
Resizing after compression
If you need both final dimensions and a smaller file, resize first and compress the final export afterward.
Guides and examples
Use this tool in a real workflow
Suggested workflow
Resize and prepare a clean image
Use this path when an image needs final framing, dimensions, and file-size cleanup.
How is the image processed?
The current public implementation is designed to load and resize the image in the browser. Avoid using sensitive images unless you have reviewed the implementation.
Can I resize JPG, PNG, and WEBP images?
Yes. The tool accepts JPG, PNG, and WEBP images and can export the resized result as JPG, PNG, or WEBP.
Can I keep the original aspect ratio?
Yes. Keep aspect ratio enabled to update height when width changes, or width when height changes.
Can I resize an image by percentage?
Yes. Use the scale control to resize the image from 1 percent to 400 percent of the original dimensions.
Will resizing reduce file size?
Usually, smaller pixel dimensions reduce file size. Export format and quality also affect the final size, especially for JPG and WEBP.