Translate the rejection message
Write each requirement separately: minimum or exact pixel dimensions, aspect ratio, maximum file size, accepted format, transparency rules, and orientation. “Too large” can refer to pixels, bytes, or both.
Resolve aspect ratio before file size
Aspect ratio describes shape. If the source and destination ratios differ, decide whether to crop, add padding, or use another source. Compressing first cannot correct the shape and may waste quality.
Set the output dimensions
Choose dimensions that meet the destination’s minimum or exact requirement. Avoid enlarging a small source unless the use case accepts the resulting softness. Preserve a separate original so the decision can be revisited.
Choose format for the content
JPEG is often efficient for photographs, while PNG can be appropriate for transparency or crisp graphical edges. The destination’s accepted formats control the choice. Converting formats can change transparency, colour, and size.
Compress to a target, then verify
Reduce quality or metadata only as much as needed to fall below the byte limit. After export, verify actual pixel dimensions, file size, format, orientation, and visible quality. A filename is not proof of a valid output.
Save the requirement, not just the file
If the destination recurs, store the requirement as a preset or checklist. That turns trial and error into a repeatable process and makes batch work safer.
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