Paperwork, handled

Business documents your customers actually trust

Solve Flow is a small toolbox of free, browser-based generators for the paperwork every business runs on — invoices, quotations, receipts, purchase orders, and digital business cards. No account, no installs, no waiting.

Used for one-off jobs or every invoice you send — the tools stay free either way.

Business & Document Tools

Five focused tools, each built for one job. Pick one, fill in your details, and download a document that looks like it came from an in-house design team.

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Why small businesses use Solve Flow instead of a template folder

Most small businesses don't have a finance department. The invoice gets written the night before it's due, the receipt gets scribbled on a pad, and the quotation is a copy-pasted email from three months ago with the numbers changed by hand. It works, until it doesn't — a wrong total, a missing tax line, or a document that just looks unfinished can cost you the client's confidence before they've even paid you. Solve Flow exists to close that gap without asking you to learn new software or pay for a subscription you'll use twice a month.

Every tool on this site does one job well. There's no dashboard to configure, no onboarding flow, and no account wall between you and the document you need. Open the invoice generator, type in your line items, and watch the total calculate itself as you go. That's the whole idea: the tool should disappear, and the document should be the only thing you think about.

Built for the paperwork that actually recurs

We picked these five tools because they cover the documents that show up again and again in a small business's week. An invoice closes out a job. A quotation opens one. A receipt proves a payment happened. A purchase order tells a supplier exactly what you're ordering and when you need it. And a digital business card replaces the box of cards sitting in a drawer with something you can share in one scan. Together they cover the full arc from first conversation to final payment, without needing five different pieces of software to do it.

Everything calculates itself

Manual math is where most document errors come from — a discount applied after tax instead of before, a line item added but never included in the total, a receipt that doesn't match what the customer actually paid. Each Solve Flow tool recalculates totals live as you type, so the number on the screen is always the number that ends up on the PDF. You can focus on getting the details right — the client's name spelled correctly, the right tax rate for your region, the correct delivery date — instead of double-checking arithmetic.

No signup, because most of this is occasional

A freelancer might send four invoices a month. A small shop might print a dozen receipts a day but only issue a purchase order once a quarter. Neither pattern justifies a monthly subscription, and neither should require you to hand over an email address before you can get your document. Everything on Solve Flow runs in your browser, and your data isn't stored on our servers once you close the tab — what you type stays yours.

Designed to be taken seriously

A document that looks improvised makes a business look improvised, even when the work behind it is excellent. Each generator produces a clean, consistently formatted PDF or image with your business details, a clear breakdown of costs, and enough structure that a client, vendor, or accountant can read it in seconds. That's a small thing on any single document, but it compounds — the client who gets a tidy invoice on day one is more likely to trust the estimate you send on day thirty.

Start with whichever document you need today

You don't need to plan ahead or set anything up. If you're chasing a payment, open the invoice generator. If you're pricing out a job, start with the quotation tool. If you just handed someone a receipt for cash, make it official in under a minute. Solve Flow is built to be useful the moment you land on it, and useful again the next time you need it — that's really the whole product.

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Frequently Asked Questions

Is Solve Flow really free to use?

Yes. Every tool — invoices, quotations, receipts, purchase orders, and the vCard QR generator — is free with no signup, no watermark, and no limit on how many documents you create.

Do I need to create an account?

No account is required for any tool. Open a generator, fill in your details, and download your document. If you'd like, your business details are remembered on your own device so you don't have to retype them next time.

Is my business data stored on your servers?

No. Every calculation and every document is generated directly in your browser. Nothing you type is uploaded or stored on Solve Flow's servers.

Can I use these tools on my phone?

Yes. Every tool on Solve Flow is fully responsive and works on mobile browsers, tablets, and desktops alike.

Which tool should I use first?

If you're pricing a job, start with the Quotation Generator. If you've completed work and need to bill for it, use the Invoice Generator. For an in-person cash sale, the Receipt Maker is fastest, and B2B buyers ordering from a supplier should use the Purchase Order Generator.