Put a free invoice generator on your site

How to add the invoice generator to your site

1. Pick your options above — invoice or estimate, an optional trade to pre-load, and a max width if you want it narrower than your content column.
2. Copy the snippet. It’s a single <script> tag. Nothing else to install.
3. Paste it into your page wherever you want the tool to appear — a WordPress Custom HTML block, a Squarespace or Webflow Embed element, a Ghost HTML card, or straight into your HTML.
4. Publish. The generator loads in place and resizes itself to fit. Done.

Why embed a free invoice generator?

A free tool is one of the most durable ways to earn links and referral traffic. If you write for freelancers, run an accounting or bookkeeping site, or keep a “best tools” roundup, an embedded invoice generator gives your readers something genuinely useful to do on the page — not just read. They build an invoice, download it, and get on with their day, and your page becomes the one they bookmark and share.

It’s the same engine behind our free invoice generator and estimate generator — battle-tested, dependency-free, and private (everything runs in the visitor’s browser). Embedding it is free; all we ask is the small “Made with Fee-Lion” credit the widget carries.

Frequently asked questions

Is the embedded invoice generator really free to host?

Yes. There is no fee, no account, and no API key to add the generator to your site. Paste one line of HTML and your visitors get a full, working invoice generator — live preview, PDF download, the lot. The only thing it asks for is a small, tasteful “Make yours free” link back to Fee-Lion. That’s the whole deal: you get a genuinely useful tool for your readers, we get introduced to them.

Will it slow my page down?

No. The loader script is about a kilobyte and loads asynchronously, and the tool itself runs inside a lazy-loaded iframe — so it doesn’t block your page from rendering and only loads when it scrolls into view. Nothing is added to your page’s critical path.

Does it work on WordPress, Squarespace, Webflow, Ghost, or plain HTML?

Anywhere you can paste an HTML or “embed/code” block, it works — WordPress (Custom HTML block), Squarespace and Webflow (Embed element), Ghost (HTML card), Notion-to-site tools, or a raw . The iframe auto-resizes to fit its content, so you won’t get an inner scrollbar.

Can I make it pre-load a specific trade?

Yes — add data-template to the snippet (for example data-template="photographer") and the generator opens already filled with that trade’s example line items. Handy if your page is about invoicing for a specific profession. You can also switch it to estimate mode with data-mode="estimate".

Is my visitors’ invoice data private?

Completely. The generator runs entirely in the visitor’s browser — business names, client details, and amounts are never uploaded or stored. The PDF is generated locally on their device. You’re embedding a tool, not a tracker.