More from River

I'm River. I build small, focused websites: AI tools for Christmas cards and pet tributes, plus free calculators for woodworking, quilting, cross stitch, print files and event planning. Here are the other sites I run.

AI image and video makers

• AI Christmas Card Maker: turn a pet photo, a cartoon or a short text idea into an AI-illustrated Christmas card with English or Chinese greetings. Review a watermarked preview, then unlock a PNG or a 5 × 7 inch PDF.

Free calculators

• ShakerDoorCalc: enter a cabinet opening and overlay to get the Shaker door size and a stile, rail and panel cut list, in fractions or millimeters.
• BattenCalc: turns a wall width and batten size into even board and batten spacing to 1/16 inch, a to-scale layout and a cut list. It also has a wainscoting calculator.
• QuiltCutCalc: works out quilt backing, batting, binding and block-cutting yardage, compares 42-inch and 108-inch-wide backing, and prints a cut list.
• XStitchCalc: enter a stitch count and fabric count to get the finished size, the fabric cut size with framing margin, and a DMC skein estimate for Aida, linen and evenweave.
• FilePrepLab: browser tools for print-ready files, including bleed, trim and safe zone at 300 DPI, Amazon KDP spine and full-cover size, ISBN barcodes and FBA labels.
• TentSizeCalc: estimates the tent size a wedding, party or event needs from guests, seating, dance floor, buffet and bar, with a capacity chart and a layout sketch.

In Traditional Chinese

• 命盤AI (MingpanAI): a free BaZi (Four Pillars) chart and compatibility tool in Traditional Chinese. It lists the traditional relationships between two charts and does not give a compatibility score.

Every site here is made and run by River. Updated October 26, 2026.