01
Resolution at intended size
The selected region's pixel width is converted into effective pixels per inch and pixels per centimeter at the width you enter. The bands are review guides, not universal tattoo requirements.
Free reference preflight
Check a tattoo reference before stencil prep.
Upload the client reference, set the intended width, and inspect the file characteristics that can make useful detail harder to preserve. Analyse the full photo or a focus region without sending the image to a server.
No accountNo AIYour reference stays in your browserNo opaque quality score
01 · Reference
Upload the source you actually received.
PNG, JPEG, or WebP up to 20 MB. The analysis runs locally in this browser.
Drop a client reference here
or choose a file with the button below
Optional context becomes useful here: the same pixels support less detail when the final footprint grows.
Height is derived from the selected crop. No stretching is applied.
Use this when only part of the photo is intended for the stencil. The tool does not guess the subject with AI.
Your reference stays in your browser. No image pixels are sent to AI or stored by this tool.
02 · Preflight report
Measure the source before you invest in stencil cleanup.
The report separates final-size resolution, sharpness, crop coverage, tonal separation, clipping, fine-detail risk, and file characteristics. There is no opaque quality score.
Final size changes the answer
Pixel dimensions only become useful when you know how the reference will be used.
A 1200 px crop is not simply good or bad. At a small final width it may carry plenty of source samples. Enlarged much further, the same crop spreads those pixels across more physical space. The checker reports that relationship instead of treating one PPI threshold as a tattoo law.
02
Sharpness signal
A Laplacian-based edge metric looks for high-frequency changes in the analysed region. It can flag a soft source, but it cannot distinguish every motion, focus, depth-of-field, or stylistic choice.
03
Artist-controlled crop
The tool does not guess the subject. You can frame the part intended for the stencil so a small face, pet, flower, or logo is measured from its own usable pixels rather than from the whole photo.
04
Tonal separation
The report combines a robust 5th-to-95th-percentile luminance spread with local contrast. It helps reveal references where nearby forms may carry little visible separation.
05
Near-clipped values
The checker reports the share of pixels very close to black and white. Those zones are not automatically wrong, but they can contain fewer visible separations to preserve.
06
Fine-detail context
Edge density is read together with final-size sampling. A detailed source enlarged aggressively deserves more scrutiny than the same source used at a smaller footprint.
Read the report
Treat every warning as a file-prep question, not a verdict on the tattoo.
The output is deliberately split by problem so you can decide what to request, crop, resize, or inspect before generation. A single percentage would hide the reason behind the warning.
Blur and softness are measured from the selected pixels, but the metric does not understand artistic intent. A portrait can have sharp eyes and a soft background. A low global sharpness number only matters when the region you actually need is also soft.
Near-black and near-white values are equally contextual. A black shirt or white background can be intentional. The useful question is whether important structure sits inside those extreme areas and still contains visible separations.
Crop can matter more than total resolution. If a client's face uses 18% of a large frame, the face does not inherit every pixel in the full image. Turn on the focus region and run the checks on the part that will actually drive the stencil.
Clear ownership
Reference preflight happens before stencil print checking.
These tools intentionally answer different questions so the same file problem does not get two competing owners.
This tool
Is the source file technically informative enough for the planned use?
It checks the original reference before stencil preparation: source pixels, selected crop, sharpness signal, tone, clipping, detail density, and final-size sampling.
Tattoo Stencil Print Checker
Starts later, from a finished stencil file. It checks physical-size and print-side risks, including optional thermal output geometry.
Tattoo Stencil Size & Print Calculator
Owns exact physical sizing, paper fit, calibration, and true-size PDF output after you have a stencil to prepare for print.
Limits
The browser can inspect the file. It cannot approve the tattoo.
The report is a preparation assistant. It deliberately stops before aesthetic, anatomical, clinical, execution, and outcome claims.
It cannot judge artistic quality or whether a design is universally tattooable.
It cannot guarantee portrait or pet likeness after generation, transfer, or tattooing.
It cannot determine anatomy, placement correctness, healing, health, or safety.
It cannot certify that a generated stencil will be correct or that a printer will reproduce it cleanly.
It cannot infer subject importance automatically. The optional focus region is chosen by the artist.
It cannot recover detail that is absent from the source. Enhancement may create plausible pixels, not evidence of the original subject.
Continue
Use the source diagnosis where it changes the next decision.
If the reference is workable, continue into the matching workflow. If an important region is genuinely missing information, request a better original before spending time on stencil cleanup.