Image size checker

• Pixel size: compares the width and height with the size the platform or printer expects, and flags an image that is below the stated minimum.
• Aspect ratio: shows how far the shape is from the one required and how much to crop to fix it.
• File size and file type: for example the 2 MB thumbnail limit in the YouTube mobile app, or the 8 MB limit for a LinkedIn banner.
• Resolution at print size: for print presets the tool divides the pixels by the inches of the file, bleed included, and reports the DPI.
• Transparency: for sticker and shirt files it looks for transparent pixels and the PNG format.
• Amazon main images: it estimates how white the border is and how much of the frame the product fills. Amazon does not say how it measures either, so treat both numbers as estimates.

Pick a print preset and the preview shows three lines. The pink band is the bleed: extend backgrounds and photos into it so a small cutting error never leaves a white edge. The black line is the trim, where the sheet is cut. The blue dashed line is the safe area: keep names, prices and logos inside it. The bleed follows the size guides: 0.125 in for the US sizes and 3 mm for A4 and the European business card.

The platform presets carry zones instead. YouTube thumbnails show the corner where the video length appears. YouTube does not publish the size of that badge, so the box is a rough marker. LinkedIn banners show the right half as the best place for text, because the profile photo covers the lower left of the banner. That is advice from the size guide, not a LinkedIn rule.

Every preset with a fixed size can export a blank guide at the exact pixel size, with the same lines drawn on it. Put the file on its own layer under your artwork and hide that layer before you export. Any editor that opens PNG or SVG files will do.

The PNG is offered up to about 16 megapixels. Larger sizes, such as the 4500×5400 px shirt graphic, are offered as SVG only, drawn at the exact pixel size.

Every preset uses the figures from one of the PiCraft size guides, and each guide links the official page it was checked against. The table below lists each preset with its target and rules, and the guide to read for the reasons behind them.

Platforms change their requirements, and printers differ from each other. If a printer gives you its own template, use that one. If a figure here is out of date, write to support@picraft.ai and we will fix it.

• It does not read color profiles or tell RGB from CMYK. Printers disagree on which they want, so ask yours.
• It cannot see whether your text sits inside the safe area. Use the overlay and the template for that.
• Browsers cannot open every format. TIFF and HEIC files often fail to load, so convert them to JPG or PNG to check them.
• The white background and product fill checks use a reduced copy of the image and a fixed tolerance, so they can disagree with a marketplace's own check.