Set Image Dimensions
Resize Image Dimensions Online
Resize JPG, PNG, and WebP image dimensions by custom width and height. Choose a common pixel preset, enter specific dimensions, keep aspect ratio when needed, preview the result, and download one resized image or a full ZIP batch privately in your browser.
How to Resize Image Dimensions Online
Upload images
Choose one image or add a batch of JPG, PNG, or WebP files.
Set dimensions
Enter the target width and height in pixels or choose a common dimension preset.
Choose resize mode
Fit within the box to keep aspect ratio, or force exact width and height.
Download resized files
Preview the output, download one image, or save the full batch as a ZIP.
Why This Dimension Resizer Is Different
Exact pixel dimensions
Resize an image to custom dimensions such as 800×800, 1200×1200, or 1920×1080.
Aspect ratio control
Keep the original shape when you need clean resizing without stretching.
Batch resize images
Resize up to 20 images together and download all successful results in one ZIP.
Before and after preview
Compare original and resized output before saving the final file.
Private browser processing
Image resizing runs locally in your browser during normal use.
Resize Image Dimensions by Width and Height
Use this online image dimension resizer when a website asks for image dimensions such as 800×800 pixels, 1200×1200 pixels, or 1920×1080 pixels. Enter the required width and height, then choose whether the image should fit inside that box or be forced to the exact size.
Resize Image to Specific Dimensions
Fit mode keeps the original shape and avoids stretching faces, products, and documents. Exact mode is useful when a form, profile, or CMS asks you to resize image to specific dimensions and will reject anything else.
When a Form Lists Dimensions in CM or MM
Some upload instructions describe photo size in cm or mm, but browser resizing works with pixels. If your form asks for dimensions in cm or mm, convert that requirement to pixel width and height first, then enter those values in this tool.
Resize JPG, PNG, and WebP Images
Upload common image formats and export the resized version as JPG, PNG, or WebP. Choose JPG for photos, PNG for graphics or screenshots that need sharp edges, and WebP for smaller web-ready images.
Need KB and Dimensions Together?
Use this page first when the upload rule needs exact dimensions. Then use Image Compressor when the same form also has a file-size limit like 100KB or 200KB. Use Image Quality Reducer when you want a manual quality slider instead of exact pixel dimensions.
Private Image Dimension Resizing
Image decoding, resizing, preview, and ZIP creation happen locally in your browser during normal processing. Your images are not uploaded to our server.
Tested for browser dimension resizing
We test custom width and height input, aspect-ratio fit mode, exact-size mode, JPG, PNG, and WebP output, before-and-after previews, individual downloads, and ZIP creation. Built and tested by Mozammel Hoshen Chowdhury. Review process: Editorial Policy.
Frequently Asked Questions
How do I resize image dimensions online?
Upload an image, enter the target width and height in pixels, choose whether to keep aspect ratio or force exact dimensions, then resize and download the result.
Can I resize an image to specific dimensions?
Yes. Choose exact mode when you need the output to match a specific width and height. Use fit mode when you want the image to stay inside those dimensions without stretching.
Can I resize images without losing aspect ratio?
Yes. The fit mode keeps the original aspect ratio and resizes the image inside your selected width and height box.
Can I resize image dimensions in cm or mm?
This tool resizes by pixel width and height. If your form lists dimensions in cm or mm, convert the requirement to pixels first, then enter the pixel width and height here.
Can I resize image in KB and dimensions together?
Use this page when dimensions are the main requirement. If the same upload rule also has a KB limit, resize the dimensions first, then use Image Compressor to reduce the file size.
Which formats are supported?
You can upload JPG, PNG, and WebP images. Downloads can be exported as JPG, PNG, or WebP.
Can I batch resize images by dimensions?
Yes. Add multiple images, apply the same width and height settings, then download individual files or a ZIP archive.
Are my images uploaded to a server?
No. Normal resizing, preview, and download generation happen in your browser. Your images are not uploaded to our server.