WhatsApp compresses images significantly when you send them as photos. The maximum dimension WhatsApp preserves is approximately 1600 pixels on the longest side, and it applies heavy JPEG compression that can reduce quality noticeably.
To minimize WhatsApp compression artifacts, pre-optimize your images before sending. Resize to 1600 pixels on the longest side and save as JPEG at 90% quality. This gives WhatsApp less work to do, resulting in better final quality.
For sharing images where quality matters (professional photos, documents, graphics), send them as documents instead of photos. WhatsApp does not compress files sent as documents.
With ImgTools, resize your images to 1600px width (or height for portraits) before sharing on WhatsApp. This pre-optimization step preserves more quality than letting WhatsApp do all the compression.
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