Create a template once, connect your structured data, and generate hundreds of personalized assets automatically.
Client-side HTML5 Canvas 2D rendering
Stop wasting hours manually placing text in graphic design tools or paying expensive monthly subscriptions to cloud PDF APIs.
Upload any high-res background, place participant names, dates, serial IDs, and organizer signature overlays. Export 1-per-page print-ready PDFs directly.
Batch-drop local attendee photos from disk. The auto-matcher binds images to names by filename, rendering clean photo placeholders and multi-up grid print sheets.
All canvas rendering, PDF creation, and ZIP compression execute locally in browser memory with Dexie.js (IndexedDB). Sensitive attendee PII never touches external servers.
Engineered for high-volume batches with zero browser freeze and enterprise offline security.
Import Microsoft Excel (.xlsx), JSON attendee arrays, or paste raw TSV/CSV from your clipboard. Edit typos directly inside the in-app spreadsheet table.
Package hundreds of standalone 1-page compressed PDFs into a single ZIP archive, formatted as {name}_{id}.pdf for instant mail-merge emailing.
Offload canvas rendering across 2–4 parallel worker threads with OffscreenCanvas and Transferable ArrayBuffers for zero-copy 60fps throughput.
Switch tabs or minimize your browser freely. The engine dynamically scales microtask chunk sizes to bypass OS timer clamping, keeping exports fast.
| Capability | BatchCanvas (Local Engine) | Traditional Cloud SaaS |
|---|---|---|
| Data Privacy & Compliance | ✓ 100% Local (GDPR & FERPA compliant) | ✗ Uploaded to 3rd party databases |
| Server Compute Cost | ✓ $0 (Zero server rendering bills) | ✗ Expensive monthly API tier pricing |
| Generation Speed | ✓ Instant (Direct GPU/Canvas accelerated) | ✗ Queued server jobs with rate limits |
| Offline Capability | ✓ Works 100% Offline on venues & flights | ✗ Fails without internet connection |
| Batch Photo Matching | ✓ Local filename-to-row matching | ✗ Requires cloud storage URLs |
Supported by creators & event builders worldwide. Zero tracking ads, 100% private offline computation.
Everything you need to know about client-side bulk template personalization, data privacy, and supported spreadsheet formats.
To bulk generate certificates, launch BatchCanvas, select the Certificate preset or upload your graphic background, import your CSV or XLSX file exported from Google Forms, match spreadsheet headers to your canvas text layers, and click Bulk Export to download a print-ready multi-page PDF or individual single-page PDFs in a ZIP archive.
No. BatchCanvas operates 100% locally in your browser memory. All spreadsheet parsing, canvas graphic rendering, QR code creation, and vector PDF compilation execute on your local device. Sensitive attendee PII never touches external servers or third-party APIs, ensuring full GDPR, FERPA, and HIPAA compliance.
Yes. BatchCanvas features a Batch Headshot Auto-Matcher. Simply drop a local folder containing attendee image files into the Data tab. The engine automatically pairs each photo to its corresponding spreadsheet record by matching filenames against attendee names, emails, or unique serial IDs.
BatchCanvas supports print-ready single-page vector PDFs (A4 and US Letter), multi-up tiled PDF sheets (2x3 or 2x4 badges with alignment crop marks), individual standalone single-page PDFs bundled in a ZIP archive ({name}_{id}.pdf), and high-DPI 300 DPI PNG/JPG image packages.
Yes. BatchCanvas requires zero active internet connection once loaded. The entire runtime, vector PDF engine, font rendering engine, and Dexie.js offline persistence database function 100% offline, allowing event teams to generate badges directly on venue floors or during travel.