The latest articles on DEV Community by Ayush Suri (@ayush_suri_dc4c37173ae624). https://dev.to/ayush_suri_dc4c37173ae624 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4218355%2F4a4fa5f5-b2df-4f8f-b3d0-7fbd0c87535c.jpg https://dev.to/ayush_suri_dc4c37173ae624 en Ayush Suri Sat, 31 Oct 2026 05:42:44 +0000 https://dev.to/ayush_suri_dc4c37173ae624/i-built-an-offline-invoice-app-in-a-single-html-file-5cb1 https://dev.to/ayush_suri_dc4c37173ae624/i-built-an-offline-invoice-app-in-a-single-html-file-5cb1 <p>I wanted a small invoice and quote tool that did not require an account or sending client data to a server, so I built InvoiceHarbor as one self-contained HTML file.</p> <h2> What it does </h2> <ul> <li>Quotes and invoices, with one-click quote-to-invoice conversion and paid tracking</li> <li>Reusable clients, tax/discount, logo, three document styles, any accent color</li> <li>A4 and US Letter print layouts; save as PDF from the browser</li> <li>JSON backup/restore; data lives in localStorage; no backend for documents</li> <li>About 119 KB with the embedded Inter font; no framework, no build step, no CDN</li> </ul> <h2> Demo </h2> <p><a href="https://myproj-20250827-f32e05.web.app/app.html?demo=1" rel="noopener noreferrer">https://myproj-20250827-f32e05.web.app/app.html?demo=1</a></p> <p>The demo uses sample data and does not save changes.</p> <h2> Source </h2> <p>The source is available under a one-time license: $24 personal (one end product) or $149 agency (unlimited client deployments). Payment is via Wise. Details: <a href="https://myproj-20250827-f32e05.web.app/" rel="noopener noreferrer">https://myproj-20250827-f32e05.web.app/</a></p> <p>I am the developer of this app. Feedback on the data model, printing and the agency use case is welcome. The app is a document tool, not accounting or tax software.</p> <p>If you want to own the source, there is a one-time $24 personal license (one end product) or a $149 agency license covering unlimited client deployments. Payment is via Wise; no subscription: <a href="https://myproj-20250827-f32e05.web.app/#pricing" rel="noopener noreferrer">https://myproj-20250827-f32e05.web.app/#pricing</a></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fq4ru0luvp2mcoshrd6dm.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fq4ru0luvp2mcoshrd6dm.png" alt=" " width="800" height="689"></a></p> html showdev tools webdev