White background generator
The blank white canvas, at the exact pixel size a platform asks for. I use it as the base layer for cut-outs and as a quick placeholder when a listing needs a slot filled.
How I use it
- Base layer for cut-outs. I export a 2000 × 2000 pure white PNG, drop the clipped product on top and flatten. The background is then guaranteed to be RGB 255, which is what marketplaces check for.
- Template for a set. One batch click gives me every size a client needs, so the product sits on identical white across the store, the socials and the banner.
- Screen backdrop. Opened full-size on a tablet, a white image is a small lightbox for jewellery and glass.
Choosing a format
| Format | Compression | I choose it when |
|---|---|---|
| PNG | Lossless | The file will be edited again, or must stay numerically exact |
| JPG | Lossy, quality 92 | A marketplace or client asks for JPEG |
| WEBP | Lossy, quality 92 | The image goes on a web page and weight matters |
A flat field compresses extremely well in all three. The estimate under the preview is measured by encoding a scaled copy in your browser, so what you see is close to what you get.
The five batch sizes
2000 × 2000 and 1600 × 1600 cover marketplace squares with zoom. 1080 × 1080 and 1080 × 1350 cover social feeds. 1920 × 1080 covers banners and video. Details of who asks for what are in Amazon photo requirements and eBay and Etsy rules compared.
Not every product wants pure white. For lifestyle frames I often start from seamless white or linen; each white page has this generator loaded with its own hex.
Questions
A flat white field encodes without visible or numeric change at quality 92 in the browsers I have tested. If exactness is contractual, use PNG.
Older browsers cannot encode WEBP and fall back to PNG. Current Chrome, Edge, Firefox and Safari all support it.
The batch saves five files in a row. Browsers ask once for permission; allow it and the rest follow.
Other bench tools
Monitor Calibration
The near-white patches I use before I trust a screen with an edit.
Dead Pixel Test
Eight flat fields to rule out the monitor before blaming the sensor.
Screen Resolution Checker
Real pixels and pixel ratio, so exports match the screen.
Screen Burn-In Test
Grey fields that show retained palettes and toolbars.
Refresh Rate Test
Checks the frame rate your tethering laptop actually runs.