Point your phone at signs and get translations with no internet
Advanced26h1–3
Tesseract.jsTransformers.jsPWA
15/20Smart Document Redactor
Automatically blur personal details before you share a document.
Intermediate14h1–2 people17/20 fit
Build Smart Document Redactor for anyone sharing ids, bank statements or forms in ~14h with 1–2 people. Stack: Tesseract.js + Transformers.js + Canvas.
Why it wins: Privacy-first and runs entirely in the browser.
Build flow
01 · Problem
People send full ID cards and statements when only one detail was needed.
02 · Solution
Detect names, numbers, addresses and faces with OCR plus rules and a local model, let the user confirm and export a redacted copy.
03 · Build
- 1OCR the document
- 2Detect PII with regex and an NER model
- 3Draw redaction boxes
- 4Export a flattened image or PDF
04 · Demo
Redact a sample bank statement in one click and show the hidden fields.
MVP checklist
- PII detection
- Review before export
- Face blur
- Runs locally
Tech stack
| Tech | Role | |
|---|---|---|
| Tesseract.js | OCR in the browser | AI |
| Transformers.js | On-device ML models | AI |
| Canvas | 2D rendering | UI |
Reference repos
Open-source projects you can build on. Links checked 2026-10-31.
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