JPEG (JPG)

Set the document to the product template or intended crop before export. Preserve an editable master and make JPEG a delivery copy, not the only working file.

Build at the maker's intended aspect ratio. Decide whether the canvas includes trim, bleed, or only the visible area. Mark guides for important content. The working document may contain layers and masks even though the delivered JPEG is flattened.

A creator can keep nonprinting guides in the editable source to mark trim, wrap, and safe areas. Before export, hide guide overlays so they do not become visible pixels in the JPEG. If the target has a nonrectangular printable area, the rectangular canvas is only a staging surface; the maker's template must show the actual boundary. Save one source version before making irreversible crop or flattening changes.

Record pixel width and height, intended output width and height, orientation, and aspect ratio. Compare them with the actual product template before upload.

Pixel dimensions are the number of samples in the exported image. Physical dimensions are the size of the finished reproduction. Neither number should be inferred from a file name. If a 3600 × 2400 image is printed 12 × 8 inches without cropping, it yields 300 effective pixels per inch in both directions; at 18 × 12 inches it yields 200. Both calculations use the same pixels.

Effective pixels per inch equals pixel width divided by printed width in inches (and likewise for height). For example, a 3000-pixel image printed 10 inches wide supplies 300 pixels per inch. That arithmetic is not a universal 300-PPI requirement; use the maker's specification for the particular product.

Pixels per inch is a useful calculation, not a universal promise of acceptable quality. Close-viewed detailed prints, textured materials, distance-viewed signs, and engraved surfaces have different requirements. Cropping also removes pixels: calculate effective density after the final crop, not from the original camera frame.

Use an explicit color workflow. Keep an appropriate embedded ICC profile when the software and handoff support it, and confirm how the recipient handles untagged or converted files. A screen preview cannot guarantee the color of a physical output.

An embedded profile helps a color-managed recipient interpret image values. A profile is not a color guarantee: an uncalibrated display, conversion, RIP, ink, white underbase, colored substrate, and lighting can change the result. If a maker requests a particular color space or profile, confirm whether they expect assignment, conversion, or preservation; these are not interchangeable operations.

A delivered JPEG is a flattened image, not a dependable carrier for editable layers. Save source layers, masks, type, and adjustments in the working document.

Keep a source document with editable text, retouching, masks, and adjustment layers. Flatten only the delivery copy. If a maker reports a cropped face or compression halo, revise the source rather than painting over the JPEG and saving it again.

The distinction matters when a buyer or maker requests a different color, crop, or product size later. A flattened JPEG may be displayed correctly but cannot reveal which pixels came from the photograph, lettering, or retouching. Keep each important element editable upstream. The production JPEG should be treated as a versioned snapshot of that source, not as its replacement.

Ordinary JPEG cannot represent transparent pixels. A white-looking area is opaque image content and may print. If transparency is required, use an accepted format such as PNG or the format specified by the maker.

When an editor exports a transparent composition to JPEG, the transparent areas are commonly flattened against a background. Inspect the saved image over the intended product color. If the background must disappear on a shirt or decal, choose an accepted alpha-capable production file instead of expecting white pixels to be ignored.

JPEG has a rectangular pixel grid, not vector outlines or machine paths. Any required cut, stitch, route, or shape information must be supplied in a compatible companion file or created through a separate controlled workflow.

A photographic image may be traced to create a path in another application, but tracing is a new design step and can change geometry. Do not label the raster JPEG as a ready-to-cut, ready-to-stitch, or ready-to-route file.

Small lettering can blur or show ringing after lossy compression. Keep text editable in the master, check the export at intended display and print size, and prefer a lossless or vector delivery format when crisp type is essential.

Small dark lettering on a light background can exhibit halos or ringing after lossy compression. For a product with essential text, keep type vector or live in the source, avoid unnecessarily repeated exports, and inspect at the actual output size. A maker may require a PDF or vector file instead.

Bleed is a product-template requirement. Extend image content past the final trim only by the amount specified for that product; JPEG does not encode a universal bleed setting.

Bleed extends image beyond a trim edge so minor cutting variation does not expose an unintended white edge. The amount belongs to the current product template. A JPEG can include bleed pixels, but it does not communicate where the trim line is unless that information accompanies it.

Keep faces, text, logos, and other important details inside the maker's safe area. Recheck after crop, wrap, seam, or finishing adjustments.

Safe areas protect subject matter from trim, seams, handles, wraps, folds, and other product features. Keep faces and text comfortably inside them. A visually centered image in the file may not be centered on the physical item.

To check a safe area, place the actual artwork on the product template and look at its smallest usable surface. For a wrap, check both ends and the area near a handle or seam. For a print, check trim and any frame or mat. The creator should approve the composition on the product, not just the rectangular JPEG opened by itself.