GizmoBloom

Free online tools for sellers

Tools for Etsy, Amazon KDP, Redbubble and print-on-demand sellers. They work in your browser, on your phone or computer, with no sign-up. Your pictures and words stay on your device.

Tags and listings

Redbubble tag generator

Up to 15 tags from the words of your design, without brand names, and a title idea.

Comma separator

Turn any list into commas, lines or hashtags, within the Etsy, Redbubble and YouTube tag limits.

Etsy SEO and listing checker

A score out of 100 for your title and tags on Etsy, KDP, Merch, Redbubble or TikTok Shop, and a better version to copy.

Trademark checker

The brand and character words that can get a listing removed, before you publish.

Idea of the day

What to list now, the date to list it by, and its keywords.

Pictures

Background remover

AI takes the background out of a photo or product picture and gives a transparent PNG.

Remove white background

A transparent PNG from a design, logo, clip art or coloring page, at once.

Image upscaler

Make a small picture 2 or 4 times bigger and sharper with AI, for printing.

Image resizer

The sizes for Etsy, Pinterest, Instagram, KDP and T-shirts, in PNG, JPG or WebP.

All four on one page: the picture tools.

Amazon KDP and Etsy

Etsy fee calculator

What Etsy takes from a sale and what you keep, for digital and physical items.

KDP royalty calculator

What you earn on each paperback, hardcover or Kindle book, after printing costs.

KDP spine width calculator

The spine width and the full cover size for your page count.

Questions

Are these tools really free?

Yes, all of them, with no sign-up and no limit on how often you use them.

Do they work on a phone?

Yes: they work in the browser of your phone, tablet or computer. You can also keep them on your phone's home screen from the phone page.

Is anything I type or upload sent anywhere?

No: your pictures, tags and listings stay on your device. The AI picture tools download their AI once, then work on your phone or computer.

Make the books, designs and listings too

GizmoBloom, the Windows app, makes your KDP books, T-shirt designs, mockups and pins, and writes their listings. Try every feature for 3 days, no card needed.