StampJam

You build a digital rubber stamp in the browser, pick a design and customize it, then download the finished image as PNG, PDF, SVG, EPS or JPG.

StampJam is an online rubber stamp generator that produces stamps with transparent backgrounds and HD output, plus an optional shabby, real world ink finish.

Four bonus stamp colors come with every plan, and you can also stamp a PDF directly.

Pricing is in Singapore dollars.

The Starter plan is 7 SGD for one stamp, you download it after payment, and no sign up is required.

That makes sense for a one-off need.

The 30 day plan at 14.175 SGD and the 365 day plan at 127 SGD both give unlimited stamps and instant downloads, but you must sign up.

Those plans add a My Library feature where you save designs in one place and copy or delete them later.

An enterprise tier is available through contact for pricing.

The tool is described as free to use online, but the downloads listed above are paid, so expect to pay for the files you actually keep.