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Orilami
Ready · load designs to begin pre-flight.

POD Print Validator: before and after

An illustration with sample files; your own files show their own results.

Before3 designs that would print badly

  • Blurry, too few pixels

  • White box around it

  • Outside the safe zone

AfterThe same designs, print-ready

  • Sharp at 300 DPI

  • Transparent PNG, no box

  • Inside the safe zone

KDP Paperback Cover Checker: 6 × 9 in Full-Wrap Pre-Flight

A KDP paperback cover is one flat image: back cover, spine and front cover side by side, with bleed all round. Its width depends on the page count and paper, so a cover sized for the wrong number of pages is rejected or prints with the spine in the wrong place.

This preset is a 6 × 9 inch paperback wrap at 300 DPI with 0.125 inch bleed, on a 3900 × 2775 pixel canvas with the spine sized for roughly 150 pages. The validator measures your file against it, checks bleed and safe margins, and exports print-ready output. For another page count, choose Custom canvas and enter the exact dimensions from KDP's cover template.

POD Print Validator

Popular

Pre-flight a paperback cover for KDP: check DPI and CMYK colours, then export print-ready PDF or PNG files.

25/ designOpen tool

This is the POD Print Validator set up for one case. See everything it does →

POD Print Validator

A print pre-flight tool for print-on-demand designers. Drop in up to 50 designs and it checks each one against a platform's real specs (Merch by Amazon, Printify, Printful, posters, mugs, phone cases, KDP covers) for resolution, safe margins, bleed, transparency and CMYK gamut, then exports print-ready files. Every pixel stays on your machine.

What it measures

Resolution is read from your file's real pixel size divided by the product's physical print size, giving the effective DPI along the limiting axis: the number the printer sees. Safe-margin checks trace your artwork's actual content and test whether it clears the safe zone. Transparency scans the alpha channel for a solid background and for the soft-edge “halo” that dirties a cut-out.

Runs in your browser

Decoding, alpha scanning, background removal, DPI compositing and DPI stamping run locally, with the heavy pixel work in a Web Worker so the batch stays responsive. Your artwork is never uploaded, which matters when designs are your inventory. Exports are built and zipped in the browser too.

Frequently asked questions

How wide is a KDP paperback cover?
A KDP paperback cover is the back cover, the spine and the front cover added together, plus bleed, so its width changes with the trim size, the page count and the paper. This preset's canvas is 3900 × 2775 pixels, which is 13 × 9.25 inches at 300 DPI, with a spine sized for roughly 150 pages. For any other page count, use KDP's cover template and enter its exact dimensions as a Custom canvas.
What is bleed, and why does a cover need it?
Bleed is artwork that extends past the trim line so that a small cutting shift does not leave a white edge. This preset uses 0.125 inch of bleed, and the validator checks that important content stays inside the safe margin while the artwork runs out to the edge.
What resolution does a KDP cover need?
300 DPI at the final printed size is the usual requirement. The check compares your pixel dimensions with the physical size, so an image that looks sharp on screen can still fall short; the report shows the DPI it works out.
Is my cover uploaded anywhere to be checked?
No. The whole check runs in your browser and the file is never uploaded. Previewing and checking need no account; an account is needed only to spend tokens when you download the result.
More questions about Orilami →

POD Print Validator at a glance

Key facts about POD Print Validator: where it runs, what it costs, what it accepts and produces, and its limits.
Where it runsEntirely in your browser. Files are never uploaded.
Cost25 tokens per design (about $0.25 at the base rate); 400 tokens for up to 25 designs
AcceptsPNG, JPEG, WebP, GIF, BMP, TIFF, HEIC/HEIF, SVG, PDF
ProducesA per-design pass/fail report, plus print-ready PNG with the correct DPI written in and PDF exports; batches download as a ZIP.
BatchUp to 50 files per run.
Account neededOnly to spend tokens. Browsing and previewing are free.
What it does not doThe colour check is a heuristic warning about colours that print badly, not a colour-managed CMYK conversion with an ICC profile.

Local processing vs. cloud tools

How Orilami compares with the typical online tool that uploads your file to its servers.

Orilami local processing compared with typical cloud tools on file privacy, edit and delete safety, speed, and pricing model.
CriterionOrilami (runs locally)Typical cloud tools
File privacy0 bytes leave your device. Files are processed in your browser's memory.Files are uploaded to external servers, where they may be logged or retained.
Edit & delete safetyYour original is never modified. The exported print file is a new file built in memory.Your original and the result often stay on their servers after you leave.
Speed & performanceInstant: runs on your device, with no queue and no upload or download wait.Depends on your connection and on server load.
Pricing modelPay per use with tokens. No mandatory monthly subscription.Typically a recurring monthly subscription that adds up.

The cloud column describes upload-based online tools in general. Individual services differ.