Make the small price tags (price cards) you set beside your books at a Japanese doujin event — Comic Market, COMITIA, and similar — entirely in your browser, on a PC or phone. Use Add item for each book, then type a title, a price (e.g. ¥800), and a short note such as NEW, used, set, R18, or freebie. Pick a card size — business-card 91×55mm, card portrait 55×91mm, small 70×45mm, or large 100×65mm — and the cards are imposed on an A4 portrait sheet with 5mm margins, 3mm gaps, and thin cut lines. The count per A4 sheet is shown under the preview. One item makes one card, so you can lay out several different books at once; turn on "fill sheet" to repeat the list and fill the A4 when you want many copies of the same tag. Change the card, text, and price colors to match your circle, choose a frame (rounded / line / none), and toggle cut marks (a thin outline around each card). Add a circle name to show it small on every card. When it's ready, Download A4 PNG saves a 300-dpi image you can print at a convenience-store multi-copy machine, a network-print service, or your home printer. Print at actual size (100%, no "fit to page") so the card size stays correct, then cut along the marks. The titles and prices you type are all composited inside your browser (canvas) — never uploaded, stored, or sent to a server.