Preparing a document photo for a 300KB limit
Phone cameras capture around 12 megapixels or more, which makes a photo of a document several megabytes. To bring it under 300 KB and keep the fine print readable, start with a good photo: lay the page flat, use daylight or bright indoor light, and hold the phone directly above to avoid a slanted page and shadows.
Crop to the edges of the page, then resize to about 1800 to 2000 pixels on the long side. At that size, 300 KB is usually enough for crisp text, logos and stamps.
Photos for listings and marketplaces
Classified sites, marketplaces and community forums often limit photo uploads to a few hundred kilobytes. A product photo of about 1800 by 1200 pixels fits in 300 KB with clean edges and natural color. Use a plain background so the bytes go to the product, not the clutter behind it.
Why is my 300KB file blurry?
If the original photo was very large, the compressor may have needed a low quality to reach 300 KB, or it may have reduced the dimensions. Look at the status line: Dimensions reduced to fit tells you the image was scaled. Resizing to about 2000 pixels first gives a sharper result than letting the tool scale a 4000-pixel photo.
Camera shake and low light also cause blur that compression can't fix. Retake the photo if the original is soft.
JPG or WebP at 300KB?
Most document upload portals expect JPG, so keep it unless the instructions say otherwise. For product photos on your own website or shop, WebP usually stores the same photo in fewer bytes and keeps transparent backgrounds. If you start from a PNG screenshot of a document, saving it as JPG at this size keeps the text readable while cutting the file size a lot.