Voltti
Voltti
Add your details, your client and your hours or items. Watch the invoice build as you type, then save it as a PDF. No signup, and nothing leaves your browser.
An invoice is only as good as the hours on it. Voltti tracks your real minutes in every app on Mac and Windows, with no timer to start or stop, and builds invoices straight from those tracked hours. Each one comes with a link where your client can check the hours on voltti.app, as Voltti recorded them.
Example: you worked 12 hours on a brand identity and 8 hours on a homepage design at $85 an hour. 12 × $85 = $1,020 and 8 × $85 = $680, so the subtotal is $1,700. With a 10% discount that is $1,700 minus $170 = $1,530. If you also charge 8% tax, that adds $122.40, for a total of $1,652.40.
Not sure what to charge? The freelance rate calculator works out the hourly rate you need from the income you want, your costs and the hours you can really bill.
Yes. There is no signup, no watermark and no limit on how many invoices you make.
Press Download PDF. Your browser's print window opens with only the invoice on the page. Set the destination to Save as PDF (on some systems it is called Microsoft Print to PDF) and save. The PDF is made by your own browser, on your device.
Your name and contact details, your client's details, a unique invoice number, the issue date and due date, a list of the work with hours or quantities and rates, the total due and how to pay you. Some places also require extra details such as a tax number, so check what applies where you work.
Use a simple sequence that never repeats, such as INV-001, INV-002 and so on. Some freelancers add the year, like 2026-001. What matters is that each invoice has its own number so you and your client can find it later.
Bill by the hour when the work is open-ended or the scope can change. Bill by item or project when the deliverable is clear. Set Bill by to Hours or Quantity and the invoice columns change to match.
Your draft, including a small logo, is saved in this browser so it is still there when you come back. Nothing is sent to a server, and your logo is never uploaded.
Yes, with Voltti for Mac or Voltti for Windows. Voltti tracks your real working minutes automatically and builds invoices from them, with a link your client can open on voltti.app to see the hours as Voltti recorded them.