Meet Tinkzy: five products, one simple idea

Tinkzy makes small web products that each do one job well. Here’s what we make today, and what’s coming next.

The idea

A lot of everyday jobs online are harder than they should be. Making an invoice, working out what a sale really earns after fees, what to set aside for tax, fixing one word in a PDF, checking whether a website is down. The answers are often buried in slow pages, sign-up forms and clutter.

We build products that get you to the answer quickly. They’re free, they don’t ask you to sign up, and they work on your phone.

Available now

SellerReceipt makes business paperwork quick. Create invoices, receipts, quotes, purchase orders and seven more documents, then download a print-ready PDF with no watermark. Nothing you type leaves your browser.

TagCalc shows online sellers what they keep after fees. Type a price and compare Etsy, eBay, Mercari, Poshmark, Depop, Vinted, Whatnot and TikTok Shop side by side.

Freelance Tax Kit helps US freelancers and 1099 contractors know what they owe before the IRS tells them. Seven free calculators cover quarterly estimated tax, self-employment tax, 1099 take-home pay, hourly rates, mileage, home office and 1099 vs W-2, all using 2026 IRS figures.

Coming soon

PDF Text Editor will let you change the text in a PDF right in your browser. Website Status Checker will tell you in seconds whether a site is down for everyone or just you.