the entrance hall — spin the sign, pick a door
Three doors. Zero signup forms.
100% FREE✳ ✳ ✳NO SIGNUP
TOOLS
drag the signpost, or use the cranks — the facing door opens on click
KitParlor is a set of 27 free, browser-based tools for people who sell things online — Etsy shop owners, Amazon sellers, print-on-demand designers, sticker makers, and anyone who has had a listing rejected over a pixel dimension. Everything is free, nothing asks you to make an account, and nothing you type or drop into a tool ever leaves your computer. There is more on who builds KitParlor and how it stays free if you want that background before trusting a number one of these hands you.
Most of a seller's week goes on small, fiddly checks that are easy to get wrong and expensive to get wrong twice. The toolbox is built around those checks.
Pricing. The Etsy & Amazon Fee Calculator takes your cost, price and shipping and returns the number that actually matters — what you keep after the marketplace takes its cut — plus your margin and your break-even price. The POD Profit Calculator does the same for Printify, Printful and Gelato, where the base cost shifts with every product and size.
Listings. The Etsy Title & Tag Counter checks a 140-character title and all 13 tags for length, duplicates and empty slots. The Amazon Listing Limit Checker counts titles, bullets and the 250-byte backend keyword field — bytes, not characters, which is where most people quietly lose keywords.
Images and print files. The POD Print File Checker tells you whether a file is genuinely large enough for the product you are putting it on, before the print partner rejects it. The Etsy & Amazon Resizer outputs the dimensions each marketplace actually wants instead of making you look them up. The Print Bleed Generator, Seamless Pattern Maker and Sticker Border Maker handle the rest of the file prep. The Product Shadow Generator puts a contact shadow back under a background-removed product photo at an angle and blur you set yourself, and the Color Code Converter moves a colour between HEX, RGB, HSL and CMYK when a printer asks for a notation you do not have.
Selling across borders. The US Landed Cost & DDP Calculator adds up duty, freight and fees so you know the real per-unit cost before you price. The EU Import VAT & Duty Estimator and the GPSR Safety Label Builder cover the EU rules that caught a lot of small sellers off guard.
This is worth stating plainly, because it is unusual. Every tool here runs as JavaScript inside your own browser tab. Your images are not uploaded. Your costs and margins are not sent anywhere. There is no account, no free trial, no upgrade prompt, and no file size cap beyond what your own machine can handle. Once a tool's page has loaded, most of them keep working with the network off.
THE LONGER ANSWERS — SIZES, RESOLUTION AND FILE PREP, WRITTEN OUT
Packing orders and waiting on a print proof leaves a lot of small gaps, so the site keeps a handful of browser games and a quieter fidget corner for those gaps — stack crates, putt a twelve-hole course, feed koi, pop bubble wrap, bloom inkblots. Same rules as the tools: free, no signup, nothing installed. Use them or ignore them; the tools work either way.