One image or a batch
Source images
JPEG, PNG, WebP
Static images. Up to 4 MiB per file, 12 MiB total and 4 million pixels per image. At most six source images.
Image Resizer
Set exact pixel dimensions, or lock the original ratio.
Open this toolAn upload form may need exact pixel dimensions while the picture still needs to look proportionate.
Choose a width and height deliberately, or lock the original ratio. Review the final dimensions before using the image.
Inputs and controls
Output width (pixels)
Tool inputs
Allowed range: 1 to 4096
Output height (pixels)
Tool inputs
Allowed range: 1 to 4096
Aspect ratio
Tool inputs
Lock ratio using width, Use both dimensions
Download format
Tool inputs
PNG, preserves alpha, JPEG, flattens alpha, WebP, server support needed
Quality
Tool inputs
Allowed range: 1 to 100
How to use
- Choose a static JPEG, PNG or WebP source. Check the displayed upload limits before processing.
- Set Output width (pixels), Output height (pixels), Aspect ratio, Download format and Quality. Review the selected units and options before preparing the output.
- Select Prepare image. Inspect the resulting preview, dimensions and file size, then download the output you need.
Why use this tool
The ratio option separates proportional resizing from an intentional change to both dimensions.
Before relying on the result
Compare the finished picture with its source. Output format, quality and image detail affect bytes separately from pixel dimensions.
Questions
Will resizing guarantee a smaller byte size?
No. Output format, quality and image detail affect bytes separately from pixel dimensions.
What should I check before using Image Resizer?
Prepare a supported source image and check Output width (pixels), Output height (pixels), Aspect ratio and Download format. Use the exact units shown beside the controls and replace any example values with your own inputs.
Source page last modified: 2026-10-04T18:22:34+00:00. This profile describes the tool; use its page to run it.
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