Screenshot polish

Screenshot polish frames a screenshot on a solid, linear-gradient, radial-gradient or transparent background, with padding, rounded corners, a drop shadow and an optional drawn browser title bar. The whole composition is drawn on a canvas in your own tab and written straight to PNG, WebP or JPEG, so the capture is never uploaded. An aspect target such as 16:9 or 1.91:1 is met by adding padding to whichever axis is short, so no pixel of the screenshot is ever cropped away.

How it works

  1. Drop your screenshots Drag one or more captures onto the drop area. They are decoded one at a time so a batch of large screenshots cannot run the tab out of memory, and the first one that reads becomes the live preview.
  2. Choose the background Pick Solid, Linear, Radial or Transparent, then set the colours. For a linear ground the angle follows the CSS convention: zero points the gradient up, ninety points it right.
  3. Set the padding and the shape Set padding in pixels or as a percentage of the width, choose a corner radius, and pick an aspect of 16:9, 4:3, 1:1 or 1.91:1. Padding grows the canvas outward; the screenshot keeps every pixel it arrived with.
  4. Adjust the shadow Set blur, spread, opacity and Y offset, and optionally turn on the drawn title bar or a hairline inner border. If the shadow reaches further than the padding, a notice tells you the canvas edge is cutting it off.
  5. Apply and download Choose PNG, WebP, JPEG or Keep, then press Apply. The export always runs at full resolution even though the preview is drawn smaller. One file downloads on its own; several arrive as file4edit-screenshot.zip.

Questions

Does it crop the screenshot to reach a 16:9 ratio?
No. Screenshot polish reaches an aspect ratio by adding padding to whichever axis is short and splitting that growth either side, which means the padding stops being equal on all four sides. Reaching a ratio by taking pixels away would be a crop, and this tool never crops.
Can I keep a transparent background?
Yes, with the Transparent ground and a format that has an alpha channel, such as PNG or WebP. If you pick JPEG instead, the tool warns you and fills the ground with the first ground colour, because JPEG has no transparency and the pixels would otherwise come out black.
Is there a limit on the output size?
The composed canvas is capped at 100 megapixels, which is roughly where browsers stop allocating and start failing outright. If your padding pushes a file past that, the tool names the dimensions it would have been and asks you to reduce the padding rather than handing back a broken file.

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