FREE TOOL · LOCAL PROCESSING
Transparency Checker.
Made for your artwork.
Detect real transparent pixels, soft alpha edges, and the visible artwork bounds.
CREATE. OPTIMIZE. SELL.
Your designs.
Your device.
A focused tool without accounts, upload queues, or third-party image APIs.
Before-and-after preview · Downloadable results · Clear quality notices
Your print-prep workbench
Real tools. Local processing. No subscription required.
ONE-STEP PRINT PREP
Merch Resizer
Upload once. Get a proportional 4500 × 5400 PNG under 25 MB.
Your output will appear here
Upload artwork to get started. Nothing leaves this browser.
LESS FILE PREP. MORE CREATING.
From your artwork to your next upload.
Start with your best source.
Choose a PNG, JPG, or WebP. For shirts and stickers, start with a genuinely transparent PNG when possible.
Leave the repetitive part here.
Resize, compress, inspect transparency, add a border, or handle a small batch. Everything processes on your device.
Give the details one last look.
Review the output on light and dark backgrounds. Download the actual file, then check your product’s current print template.
YOUR CREATIVE TOOLKIT
A little less friction. A lot more making.
Merch Resizer
4500 × 5400 PNG, automatic compression under 25 MB, and transparent padding.
↗PNG Compressor
Keep your dimensions and reduce file size. Full-color or adaptive palette optimization.
↗Background Remover
Remove edge-connected solid colors. Color picker, tolerance, and soft-edge controls.
↗Transparency Checker
Detect real transparent pixels, soft alpha edges, and the visible artwork bounds.
↗Sticker Outline
Create an outline in your chosen color without clipping the edge of your artwork.
↗Shirt Preview
Preview artwork on a flat shirt silhouette. Change the color and design size.
↗Image Upscaler
Enlarge 2× or 4× with smooth or pixel-art interpolation. No AI-detail claims.
↗Bulk Processor
Prepare up to six designs and download one ZIP, or batch rename without re-encoding.
↗Custom Resizer
Choose exact dimensions, fit, crop, or stretch. Transparent-capable PNG output.
↗Format Converter
Convert PNG, JPG, and WebP. Choose export quality and a background for JPG.
↗Color Limiter
Reduce to an adaptive palette of 2–256 entries. Preserve fully transparent areas.
THE PRINT-PREP FIELD GUIDE
Small checks. Better files.
Prepare a 4500 × 5400 transparent PNG
A practical walkthrough for sizing, transparency, and reviewing your final artwork.
Read the guide →FILE SIZEGet a PNG under 25 MB
Understand full-color encoding, palette reduction, and the quality tradeoffs.
Read the guide →DESIGN CHECKIs your background really transparent?
How to spot a baked-in checkerboard and avoid a white rectangle on your shirt.
Read the guide →A few things worth knowing.
Do my images leave my device?
No image file is uploaded by these tools. Processing happens in a browser worker. The host receives normal requests for the website itself; read the privacy notice for details. Downloaded files are saved by your browser.
Will compression always be lossless?
No. The automatic mode tries a full-color PNG first. When that exceeds the chosen limit, it reduces the color palette. Fully transparent areas remain transparent, but colors and semi-transparent edge values may change. The result tells you when this happens. The compressor also has a full-color-only mode.
Does resizing make a low-resolution design print sharply?
Not automatically. Enlarging gives you more pixels but does not recover detail that was absent from the source. Our upscaler uses interpolation, not AI reconstruction. Inspect the result at the intended print size.
Can I use this for every print-on-demand product?
The 4500 × 5400 target is one workflow, not a universal product specification. Use the current template from your marketplace or printing provider. Custom Resizer supports other dimensions. These tools do not guarantee marketplace approval, color matching, or print quality.
Why do some large images fail on my phone?
A print-resolution canvas needs much more working memory than its compressed file size. Processing runs one image at a time. Close other tabs, use a smaller source, or try a device with more memory. Cancelling stops the image worker.
Is the background remover powered by AI?
No. This version removes a chosen solid background color. Edge-connected mode helps preserve matching colors inside a design. It is not intended to separate hair or complex photographic scenes automatically.