Free UK delivery over £15 · Order before 2pm
Cleaner artwork · cleaner impressions
Get a cleaner stamp result by uploading clear, suitable artwork. Start with the best logo file you have and use this guide to avoid the problems that make fine detail difficult to reproduce.
Upload the best file you have. Every custom design is reviewed before manufacture, and Stamp Ninja will contact you if the artwork or chosen size is likely to affect the result.
Illustration only — the finished result follows your own uploaded logo and chosen stamp size.
PNG, JPEG or WebP, up to 5MB. The bigger and clearer, the better.
A conventional stamp reproduces ink or no ink—not continuous colour and shading.
Upload the largest, clearest source rather than a screenshot or social-media thumbnail.
Stamp Ninja reviews custom artwork before it moves into production.
Start with the strongest source
A clean original gives Stamp Ninja more useful information than an enlarged copy. Do not worry if you are unsure which format is best—the aim is simply to avoid throwing detail away before the artwork is checked.
Use the largest, clearest version of your logo you have.
Upload the biggest and clearest version available. A transparent-background PNG is helpful, but image clarity matters more than simply changing the file extension.
The key artwork rule
A colour printer can reproduce gradients, shadows, transparency and photographs. A conventional rubber stamp normally converts the design into solid printing and non-printing areas. Different logo colours do not become separate shades in a single-colour impression.
Upload your normal colour logo if that is the best file you have. Stamp Ninja can assess how it will translate, but some effects may need to be removed or simplified.
Original colour artwork
Possible stamp interpretation
Clarity at the real impression size
Extremely thin strokes may look perfect on a large screen but become weak or close up when reduced and stamped with ink.
Taglines, registration text and tiny contact details need enough physical height and spacing to remain readable.
Narrow gaps between letters or shapes can fill with ink. Open space helps the impression stay recognisable.
A detailed logo may need a larger impression. Judge the artwork against the stated impression size, not the size of the stamp body.
A quick self-check
What happens after upload
Select a shape and impression size that gives the logo enough room to remain clear.
Add the best available logo file in the product personaliser and check its position, scale and proportions.
Stamp Ninja checks whether the design can be converted and reproduced reliably at the chosen size.
If a material problem is found, Stamp Ninja will contact you before manufacture. Otherwise the approved artwork moves into production.
Do not choose purely by price or stamp-body dimensions. Compare the actual impression sizes and allow space for thin lettering, close shapes and any supporting text.
Artwork handled by an experienced stamp maker
Practical experience converting business artwork into reliable stamp impressions.
Producing personalised stamps for UK customers since 2017.
Artwork preparation, production and dispatch handled from Blackburn.
Obsesso Ltd holds written COLOP authorisation to list genuine COLOP products.
Before you upload
Yes. Upload the clearest PNG, JPEG or WebP version you have, up to 5MB. A rubber stamp prints solid ink or no ink, so colours, gradients and shadows may need to be simplified.
Upload a PNG, JPEG or WebP file up to 5MB. Use the largest, sharpest version you have.
If needed, you can email vector files (PDF, SVG, EPS or AI) to hello@stampninja.co.uk with your order number.
Yes. The uploader takes PNG, JPEG and WebP files up to 5MB. Send the largest and sharpest version you have; a PNG with a transparent background works well. Avoid screenshots, thumbnails and images saved from social media.
Photographs, gradients, shadows and transparency cannot normally be reproduced directly by a conventional solid rubber stamp. The artwork may need to be converted or simplified into clear printing and non-printing areas.
View it close to the intended physical impression size. Tiny lettering, hairline strokes and narrow gaps are warning signs. A larger stamp may preserve the design better.
Yes. Every custom design is reviewed before manufacture. If the file, layout or chosen stamp size is likely to affect the result, Stamp Ninja will contact you before production begins.
Choose the right logo stamp, upload the cleanest source available and inspect the live preview. If the artwork is likely to cause a production problem, Stamp Ninja will contact you before manufacture.
