Gmail invoice extension
YOU’RE ALREADY IN GMAIL.
Send the invoice from the thread.
SMASH docks in your Gmail sidebar. Scan the customer’s email or talk the job — get a priced, tax-ready invoice or quote, attach it to your reply, and collect payment. No new app. No copy-paste into spreadsheets.
Chrome extension for Gmail. Syncs to Xero and QuickBooks. iOS app for on-site voice invoicing.
Install SMASH for Gmail — Free Full feature tour →
What is the best Gmail invoice extension?
SMASH is a Chrome extension that adds an invoice and quote builder to Gmail. It reads open customer emails (From Email), accepts voice dictation (Start Recording), applies your saved pricing, generates GST- or VAT-ready PDFs, and lets you send from the same thread with approval and pay links. Completed documents sync to Xero or QuickBooks Online.
Simple as: works with Gmail, Xero, QuickBooks, and as a standalone invoicing tool.
Use something else? Email dan@smashinvoices.com.au and we will add your stack to the roadmap.
"Customer emails a job, I tap From Email, invoice is in the reply. Didn’t open another tab."
— Chris P. — electrician, Sydney
Gmail invoice workflow comparison
Why a dedicated sidebar beats templates and copy-paste.
| Method | Typical time | Typing required |
|---|---|---|
| Word/Excel template | 10–15 min | All line items |
| Separate invoicing app | 5–10 min | Most fields |
| Rough email estimate | 2–3 min | Yes — looks unprofessional |
| SMASH Gmail extension | Under 60 sec | None (voice or From Email) |
From email to invoice
Scan it. Price it. Send it.
The customer already wrote the scope in Gmail. SMASH extracts names, line items, and delivery details, matches your catalog, and builds the invoice while you read the thread.
- From Email — One press — structured invoice from the open message.
- Active context — Customer and thread history in the sidebar.
- Cover letter — Professional reply text drafted for you.
Voice when you need it
Talk the job. Skip the keyboard.
On site or after a call, hold Start Recording and describe labour, materials, and fees. SMASH transcribes, prices, and prepares the PDF — still inside Gmail when you’re back at the desk.
- Natural speech — Explain the job like you would to the client.
- Pricing DNA — Your rates from day one — upload an old invoice once.
- Under 60 seconds — Review, copy to Gmail, send.
Paid-ready documents
Approve. Pay. Sync.
Clients open a clean portal link — approve, pay by card, done. You get read receipts and payment notifications. Push the finished invoice to Xero or QuickBooks without typing it twice.
- Pay now links — Stripe, Apple Pay, Google Pay supported.
- Tax compliant — GST, VAT, sales tax per your settings.
- NDIS fields — Participant numbers on PDFs when saved.
No manual entry. No brain fog. No missed details.
Gmail sidebar
Works in Chrome on desktop — stays on the email thread.
Email to invoice
Parse enquiries and attachments into line items.
Voice to invoice
Dictate scope; SMASH fills priced rows automatically.
Quote or invoice
Same workflow for estimates and tax invoices.
Client portal
Approve and pay from mobile — no app download.
Xero + QBO sync
One click to your ledger when the job is won.
Repeat jobs
Clone last invoice as a new draft in one tap.
Privacy first
Only the open thread is processed; audio not stored.
Frequently asked questions
Does SMASH work inside Gmail on mobile?
The Gmail invoice extension runs in Chrome on desktop and laptop. For mobile, use the SMASH iOS app for voice invoicing on site.
Can I send invoices without Xero or QuickBooks?
Yes. SMASH generates and sends standalone PDF invoices and quotes. Accounting sync is optional on paid plans.
How is this different from Gmail add-ons like templates?
Templates still need you to type prices and line items. SMASH reads the email or your voice and builds the full document with tax and totals.
Is it free to try?
Yes — five invoices or quotes per month at no cost. No credit card required to install.
What countries are supported?
Australia, New Zealand, United Kingdom, United States, and Canada — with local tax handling.
How do I install it?
Add SMASH from the Chrome Web Store, sign in, connect Gmail permissions, and open any customer email to see the sidebar.
Your inbox is your sales desk.
Install the Gmail invoice extension and send the next quote before you finish your coffee.
Add SMASH to Chrome — Free