--- title: "T-Shirt Mockup Generator: Free, In Your Browser" description: "Free T-shirt mockup generator: upload a PNG, preview it on every Merch on Demand shirt color, move and resize it, download the mockup. No watermark." url: https://podly.co/tools/t-shirt-mockup-generator/ --- [Free tools](https://podly.co/tools/) [Design & print](https://podly.co/tools/#design-and-print) # T-shirt mockup generator for every Merch shirt color This T-shirt mockup generator puts your PNG on every Merch shirt color. Move and size the design inside the print area, then download the mockup as a PNG. Your file never leaves your browser. - Free - No account, no watermark - Your file stays on your device Your design Drop your image here Choose a file PNG, JPEG or WebP · Your file never leaves your browser Shirt color: Black Colors of Merch on Demand's standard T-shirt, shown approximately. Real fabric looks different on every screen. Design size: 12.0 × 12.0 in on the shirt Show print area Upload your design to place it on the shirt. ## How to make a T-shirt mockup 1. Drop your design on the upload box, or click it to choose a file. PNG with a transparent background works best. 2. Pick a shirt color. Try your design on the dark and the light shirts before you choose the colors you sell. 3. Drag the design to move it, use the slider to size it, and press **Center** to center it again. The label above the slider shows the printed size in inches. 4. Click **Download PNG**. The mockup has a transparent background, ready for a listing or a post. ## What the preview shows The dotted box is the Merch on Demand print area: 15 × 18 inches, which is the 4500 × 5400 pixel template at 300 DPI, starting 1.5 inches below the collar. A design cannot leave that box, just like on Amazon. Amazon recommends keeping the widest part of a design at 12 inches or less, so try the slider at 12 in before you decide. The tool also checks contrast: it averages the colors of your design and warns when it is close to the shirt color, for example a dark gray design on a Black shirt. Merch's [Best Practices](https://merch.amazon.com/resource/201849250) warn about the same thing: colors close to the fabric can disappear or print with a hard halo. Shirt color names come from a live Merch on Demand T-shirt listing and that page, checked on November 14, 2026. The color values are our approximation. ## Worked example A 4500 × 3000 pixel slogan at full width prints 15 × 10 inches, which looks huge on a size S. At 80% on the slider it prints 12 × 8 inches, the width Amazon suggests. Placed at the top of the print area, it starts 1.5 inches below the collar: Amazon says apparel designs usually do best near the top of the print area. ## Mistakes to avoid - **Only checking on white.** A design that looks great on White can vanish on Black or Navy Blue. Check every color you plan to sell. - **Leaving a white background.** A JPEG or a PNG without transparency prints a white box on dark shirts. - **Placing the design too low.** Designs near the top of the print area usually look best on the chest. - **Thin lines on heathers.** Fine detail fades on textured fabric. Make lines at least 2 pt thick. Check the exact file size for each product in the [T-shirt design size chart](https://podly.co/tools/t-shirt-design-size-chart/). Then see what already sells: [Podly's Merch database](https://podly.co/features/merch-database/) shows the rank and sales of millions of Merch on Demand shirts. Facts checked and page updated on November 14, 2026. ## T-shirt mockup questions, answered. Something we missed? [Send us a message.](https://podly.co/contact/) A human answers. **01 Is this T-shirt mockup generator free?** Yes. No account, no watermark and no limit. Upload a PNG, pick a shirt color, place the design and download the mockup as a PNG. The first download asks for your email. **02 Is my design uploaded to a server?** No. The image is read and drawn by your own browser on a canvas. It never leaves your computer, so you can preview unreleased designs safely. **03 Which shirt colors can I preview?** The 29 colors of Amazon Merch on Demand's standard T-shirt, from Black and Navy Blue to Heather Grey and Lemon. The colors are approximate: heathers are shown flat and every screen shows fabric a little differently. **04 Can I use these mockups on Etsy or social media?** Yes, the mockup is yours to use. For Amazon Merch on Demand you do not upload a mockup: Amazon makes the product images from your design file. **05 What size should my design be?** For a Merch on Demand T-shirt, 4500 × 5400 pixels as a PNG with a transparent background. A file at exactly that size fills the 15 × 18 inch print area in the preview. More free tools ## Keep going with these free tools. - Design & print ### T-shirt design size chart Print sizes and placement by product - Design & print ### Merch design checker Check a file against Merch image rules - Design & print ### DPI checker Check an image file’s DPI and print size Free ebook ## +1,000 Print-On-Demand niches. Free, in your inbox. More than 1,000 hot Print-On-Demand niches, updated weekly. Discover top-selling ideas and start getting more sales. [See what's in the guide](https://podly.co/1100-free-niche-for-merch-by-amazon/). ![The 1,000+ Niches That Sell ebook standing in the clouds](https://podly.co/images/home-v2/ebook.webp) ## Mockup done. Now check the design will sell. Join 6,000+ Merch sellers who check Podly before they design. [Start free, find best-sellers](https://app.podly.co/register?utm_source=podly.co&utm_medium=website&utm_content=t_shirt_mockup_generator_final) [Add to Chrome, free](https://chromewebstore.google.com/detail/podly-ai-toolset-for-merc/dipicnapjjmogjmpcncbfooffdhcfndk) ![Podly Merch Database](https://podly.co/images/home-v2/tab-research.webp)