Which image should I use for a tattoo stencil?

Choose a sharp JPG, PNG, or WebP image up to 20 MB with a visible subject, useful contrast, and enough detail for the intended print size. A focused photo or a clean scan gives the converter clearer boundaries. Check the original at full size before selecting it. If a petal edge or letter opening is missing there, the generated linework needs a better source or a deliberate repair.

For a drawing on paper, photograph or scan it first and select the saved image file. For artwork made in a drawing app, export a flattened image and keep the editable original separately. Start with an image you own or have permission to use. Keep that original beside the generated result so you can judge whether a new line describes the subject or comes from lighting, background texture, or compression.

Check focus where the important edges meet

Look at the areas that identify the subject before judging the whole picture. In a portrait, examine an eyelid, the corner of the mouth, and the profile of the nose. In a flower, inspect overlapping petals and the point where a stem joins a leaf. These small junctions reveal motion blur and missed focus more clearly than a large, smooth background.

Zoom until the source is shown near its original pixel size. A soft image enlarged to fill the screen can appear more detailed than it really is because the viewer smooths the pixels. Compare two candidate photos at the same viewing scale. If one has a sharper outline and the other has more attractive colors, decide which contains the edges needed for the stencil. The line guide depends on those edges, so choose the photo that preserves them.

Use lighting that separates the subject

Choose even light that reveals shape without erasing important edges. For a pale flower, a plain darker background can make the outer petals easier to distinguish. A flash reflected from glossy petals can turn a fold into a white patch. A hard shadow from a phone can introduce a line that belongs to the lighting rather than the drawing.

If you can retake the photo, move the light or the subject and compare the result before changing the converter settings. For a drawing, keep the paper flat and light it evenly from outside the camera's shadow. Check both the brightest area and the darkest corner. A source with clear dark ink and a consistent background often needs less cleanup than a photograph whose page changes from white to grey across the frame.

Give the subject enough room in the frame

Include every tip and border that belongs in the final outline. Crop away unrelated objects while leaving a little space around the subject. The camera should be square to a flat drawing so a circular frame stays round and parallel edges stay parallel. If the top of a page is narrower than the bottom, take a more level photograph before using it for a measured proof.

For a photograph with a detached element, such as a small star next to a larger figure, check that both parts remain after cropping and subject selection. A tight crop that removes the star changes the composition. A loose crop with a table edge introduces something else the converter may trace. Save a separate cropped copy so the original remains available if you later decide to include more of the image.

How do you prepare digital artwork for a tattoo stencil?

Export a flattened JPG, PNG, or WebP with the contours you want to keep. Save the editable artwork separately so you can revise its layers later.

A scan is useful when the original already contains the lines you want. Clean ink on light paper often suits Keep ink. A photo can supply the contours of a three-dimensional subject, but the result needs interpretation because a change in tone can come from a shadow, surface texture, or a real edge. An exported drawing can give you a clean outline if you hide draft marks and guides before saving the image.

Open an exported image outside the drawing app once. Confirm that the background, dimensions, and visible layers match your intention. A compass drawing may need the outer ring and major points in the line guide while the shading stays in the separate reference. If the image is a screenshot of the drawing app, crop away toolbars and selection boxes or export the artwork directly. The source settings answer explains which treatment to compare after selecting the file.

Judge detail against the intended size

Think about the physical width you want before choosing between sources. A large original with clear edges gives you more room to simplify than a small thumbnail. A 40 mm symbol may need only its silhouette and two interior marks, while a 120 mm version might use additional divisions. An image packed with tiny hatches can still need simplification even if it has many pixels.

Compare a small region in two sources using the same intended scale. A sharper image should reveal a real separation between marks, rather than just darker noise around them. If every available image loses the same detail, keep that limitation visible in the reference and discuss how to represent it with your artist. The resolution answer explains why a larger export cannot restore information absent from the input.

Save a compatible copy with clear edges

Use JPG, PNG, or WebP within the 20 MB limit. A PNG is a practical choice for an exported monochrome drawing because it can preserve hard edges without JPEG compression artifacts. A JPG can work well for a clean photograph when its edges remain intact. For a WebP, inspect the file you actually saved, since its appearance depends on how the original program compressed it.

If a file exceeds the limit, use an image editor to crop empty space or save a smaller copy. Keep enough pixels for the subject you intend to print. Repeatedly saving a compressed JPG can introduce blocks and speckles near fine contours, so make the compatible copy from the best original you have. Renaming a file extension does not convert its contents. Open the saved copy to confirm that it displays properly before selecting it in the workspace.

Run a short comparison before editing

Choose two landmarks and keep them fixed through the first comparison. For a moth, use a wing tip and one internal opening. For lettering, use an enclosed space and the junction between two strokes. Select the image in the workspace, inspect the subject selection, and compare the generated lines with the original using the divider.

If an important part is missing at the selected subject boundary, address that boundary before adjusting line thickness. If the subject is complete but the generated output adds texture everywhere, compare source handling or a simpler style. If the input itself has no readable edge at your checkpoint, return to the image choice. This short check prevents a long editing session based on a file that cannot carry the detail you want.

Keep the source and the selected result together

Save your original and a separate copy of any crop, corrected photograph, or exported line drawing you used. Give the chosen copy a useful label so you can find it after comparing alternatives. Record the proposed print width and the features you want to retain. That makes the next round of changes easier to explain and repeat.

Before moving on, check focus, complete framing, contrast at the key edges, file format, and intended size. Then use the illustrated making steps to generate and review the linework. If the source is a photo and its background competes with the subject, the photo conversion answer gives a more detailed workflow for that case.