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Image Aspect Pad

Fit a new shape. Keep the whole image.

Fit a new shape with transparent or colored padding. Choose a ratio or canvas size, place your image, and download a PNG. Entirely in your browser.

Settings

1. Choose image

JPEG, PNG, WebP and other formats your browser can decode.

No image selected.

Aspect padding settings
2. Target mode
Aspect ratio

Adds the smallest whole-pixel canvas that contains your image. Rounding may slightly change the requested ratio.

3. Alignment
4. Background

Color fills only the added area. Transparency inside your source image is retained.

Choose an image to see output dimensions.

Choose one image to begin.

Result

Your padded image will appear here.
Choose an image, set its shape, then create the PNG.

Create a PNG to see its actual dimensions and file size.

View original image

Your image will appear here.

Your image is never resized or cropped. Padding adds canvas space; PNG output may be larger than the source.

How to use

  1. Choose your imageOpen an image from your device.
  2. Set the new shapePick a ratio or canvas size, placement and background.
  3. Create and downloadCheck the actual preview and dimensions, then save your PNG.

Files stay on your device.

Your image is decoded, drawn and exported in your browser. This tool does not upload, log or store your file. Clear the image or leave the page to release it.

PNG output and metadata
  • One still PNG with source transparency retained.
  • Source metadata, including EXIF tags, is removed.
  • Animation becomes one decoded frame.
  • Browser decoding and sRGB export may change HDR or wide-gamut colors.

Frequently asked questions

Why can the actual ratio differ?

Images have whole-pixel dimensions. Ratio mode keeps one source dimension and rounds the expanded dimension up. For example, a 5 × 3 image padded to 16:9 becomes 6 × 3, an actual ratio of 2:1. The output details show that difference. Use a canvas size with exact ratio multiples when you need an exact ratio.

Will padding resize or crop my image?

No. The source keeps its decoded, oriented dimensions. Canvas size must contain it in full. A centered image with an odd number of spare pixels has one more pixel on the right or bottom. When no padding is needed, the result says so; it is still re-encoded as PNG.

What happens to transparency and orientation?

The browser applies source orientation during decoding. Transparent padding stays clear; a solid color fills only the added area. Existing transparent pixels inside the source stay transparent. The downloaded PNG contains the displayed orientation without the original orientation metadata.

What if an image cannot be processed?

Damaged or unsupported images show a decode error. Use a current browser that can create PNG images. Available memory and native canvas limits determine what can be processed; there is no fixed file-size or dimension cap. Cancel & clear stops processing. After a processing failure, choose the image again and try a smaller canvas or source.

Continue editing: Resize image · Border & padding · Crop image