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.
Fit Image Inside Box
Keep the whole image within a maximum width and height.
Open this toolKeeping a whole picture inside a box is different from filling every corner of that box.
Enter maximum width and height and inspect the fitted output. The image keeps its shape without a crop.
Inputs and controls
Output width (pixels)
Tool inputs
Allowed range: 1 to 4096
Output height (pixels)
Tool inputs
Allowed range: 1 to 4096
Enlarge small images
Tool inputs
Do not enlarge, Allow enlargement
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), Enlarge small images, 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 complete subject remains visible when dimensions are treated as limits.
Before relying on the result
Compare the finished picture with its source. One dimension may be smaller to preserve the image's aspect ratio.
Questions
Will the output always equal both box dimensions?
No. One dimension may be smaller to preserve the image's aspect ratio.
What should I check before using Fit Image Inside Box?
Prepare a supported source image and check Output width (pixels), Output height (pixels), Enlarge small images 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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