The latest articles on DEV Community by bowu feng (@bowu_feng_15644049f818537). https://dev.to/bowu_feng_15644049f818537 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%2F4031200%2Fb216fb8b-a214-4545-8aee-a5ae770491c8.png https://dev.to/bowu_feng_15644049f818537 en bowu feng Thu, 16 Jul 2026 02:10:39 +0000 https://dev.to/bowu_feng_15644049f818537/how-i-built-a-free-invoice-ocr-that-runs-100-in-your-browser-open-source-5hl4 https://dev.to/bowu_feng_15644049f818537/how-i-built-a-free-invoice-ocr-that-runs-100-in-your-browser-open-source-5hl4 <p>Every expense report tool I've tried either required uploading sensitive invoices to someone else's server or couldn't handle Chinese invoices properly. So I built a browser-native solution.</p> <p><strong>Ticket-Check-Bro</strong> is an open-source, client-side invoice parser that extracts structured data from PDFs and images — all within the browser, no server upload.</p> <h3> What's New in v1.4.1 </h3> <ul> <li> <strong>Multi-page PDF</strong>: reads ALL pages, not just the first 3</li> <li> <strong>Multi-format export</strong>: Excel (.xlsx) / CSV / JSON — amount fields exported as raw numbers</li> <li> <strong>Search &amp; filter</strong>: find files by name, invoice number, or amount</li> <li> <strong>Summary dashboard</strong>: total amount + document type breakdown</li> <li> <strong>Confidence indicators</strong>: per-field confidence scores, low-confidence fields highlighted</li> </ul> <h3> Key Features </h3> <ul> <li> <strong>8 document types</strong>: Chinese VAT invoices, train tickets, flight itineraries, taxi receipts, fixed-amount receipts, toll invoices, vehicle invoices, and English invoices</li> <li> <strong>Dual engine</strong>: PDF text extraction (pdfjs-dist) + image OCR (Tesseract.js WASM)</li> <li> <strong>PDF merge</strong> with per-page selection</li> <li> <strong>Batch rename</strong> with template variables → ZIP download</li> <li> <strong>Drag-and-drop sort</strong> for file ordering</li> <li> <strong>i18n</strong>: English &amp; Chinese UI</li> <li> <strong>Dark mode</strong> with system preference detection</li> <li> <strong>PWA</strong>: installable, works offline</li> <li> <strong>Keyboard shortcuts</strong>: Ctrl+O / Delete / Ctrl+E</li> <li> <strong>Session persistence</strong>: auto-save/restore via localStorage</li> </ul> <h3> Tech Stack </h3> <p>React 18 + Vite 5 + Zustand + pdfjs-dist + pdf-lib + Tesseract.js + SheetJS + JSZip</p> <h3> Links </h3> <ul> <li>Live demo: <a href="https://ticket-check-bro.vercel.app/" rel="noopener noreferrer">https://ticket-check-bro.vercel.app/</a> </li> <li>GitHub: <a href="https://github.com/bo-wu-feng-199/Ticket-Check-Bro" rel="noopener noreferrer">https://github.com/bo-wu-feng-199/Ticket-Check-Bro</a> </li> </ul> <p>No signup. No install. Just open and drag your files in.</p> opensource react javascript ocr