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Adjust submission images to specified dimensions and file size

Choose 1 still image for an application or registration, then specify the width, height, and file size limit required by the recipient. Choose exact dimensions or fit within the limits while preserving the aspect ratio, check the padding and result, and save as JPEG or PNG. An error occurs if the file size limit cannot be met while keeping the specified dimensions.

Add files

1 still image / JPEG・PNG・WebP・HEIC・GIF

Fit the entire image and add padding in the remaining areas.

Advanced settingsJPEG · Background color White

The color used for margins and transparent areas.

Original dimensions (determined after input) · Keep whole image · Up to 100 KB

What you can do

Set dimensions and file size together

Specify width and height in pixels and file size in KB. You can leave dimensions blank if none are required.

Distinguish exact dimensions from maximum dimensions

“Exact size” creates the frame at the specified dimensions. “Within specified size” preserves the aspect ratio and reduces the image only when necessary.

How to use

  1. Choose an image to submit

    Choose 1 still image for an application or registration.

  2. Enter the recipient's requirements

    Enter the width, height, and file size limit, then choose exact size or fit within the limits.

  3. Check actual dimensions and file size

    Check the padding and text readability, save the result, and upload it to the recipient.

Useful when

Meet an application form's image requirements

Create a file that meets the submission destination's requirements, such as “1000 × 1000 px, 100 KB or less”.

Avoid making images too small

If only maximum dimensions are specified, adjust within those dimensions while preserving the original aspect ratio.

What to watch for when meeting submission requirements

Specify just width or height

With exact size, entering only one side calculates the other from the original image's aspect ratio. If both fields are blank, the original dimensions are used as a reference.

When file size and dimensions cannot both be met

An error occurs if file size cannot be reduced while keeping the specified dimensions. Increase the file size limit or allow reduction with “Within specified size”.

Frequently asked questions

What happens to dimensions left blank?

Blank fields are not treated as 0 pixels. The original image dimensions are used as a reference; if only one side is specified, it is adjusted according to the selected method.

Is padding added when fitting within a specified size?

Output uses the actual dimensions with the aspect ratio preserved, so no padding is added to match the specified frame size. The image is not enlarged beyond the original.

Can I remove a photo's background?

This is not a background removal feature. In advanced settings, you can change the padding used to fit the frame and the background color for transparent areas.

File handling

Input
1 still image.
Dimensions
1–32768 px. Width and height may be left blank.
File size limit
1–500000 KB. Default: 100 KB.

Current settings

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