The Fundamental Difference
DeckEdit and Tenorshare PDNob both use OCR to convert PDF slides into editable PowerPoint files. However, they differ fundamentally in delivery model: DeckEdit runs entirely in your browser with zero installation, while PDNob requires downloading and installing a 200MB+ desktop application on Windows or Mac.
The other critical difference is cost. DeckEdit is 100% free with no limits — no watermarks, no trial expiration, no feature gating. PDNob's free trial imposes watermarks after 20 exports, restricts OCR to once per week, and limits batch processing to 5 files at a time. Removing these restrictions requires purchasing a license at $44.99/year or $59.99 for a lifetime license.
How Each Tool Works
DeckEdit runs a neural network OCR engine directly in your browser. Drop in a PDF or image, and it detects every text region, placing each one as an editable PowerPoint text box at the exact same position. Original slide backgrounds are preserved as image layers. No installation, no account, no internet required after initial model download. Works on any device with a browser — Windows, Mac, Linux, Chromebook, tablet.
Tenorshare PDNob is a desktop application that must be downloaded and installed (200MB+). It provides PDF-to-PowerPoint conversion along with other document conversion features. The application runs locally on your computer after installation, but requires a paid license to unlock full functionality. Available only on Windows and Mac — no Linux, no Chromebook, no mobile support.
Free Tier Limitations: A Critical Difference
DeckEdit has no free tier limitations because it is entirely free. There are no watermarks on any export, no conversion limits (convert as many files as you want), no feature restrictions, no trial period, and no account required. Every feature available today will remain free forever.
PDNob's free trial has significant restrictions that affect daily use: watermarks appear on exported files after 20 conversions, OCR functionality is limited to once per week, batch processing is capped at 5 files per session, and some advanced features are locked behind the paid license. These limitations make the free trial impractical for regular use — most users will hit the watermark threshold within their first session.
Feature Comparison
| Feature | ||
|---|---|---|
| Pricing | 100% Free (no limits) | $44.99/year or $59.99 lifetime license |
| Free Tier Limits | None. Unlimited conversions, no restrictions | Watermarks after 20 exports, OCR once/week, batch limit 5 files |
| Platform | Any device with a browser (Windows, Mac, Linux, Chromebook, tablet) | Windows and Mac only (desktop app) |
| Processing | 100% local (browser) | Desktop app (local after install) |
| Installation Required? | No — runs in any browser | Yes — 200MB+ download and install |
| Privacy | Highest (zero servers, zero data collection) | Medium (collects device info, IP, usage logs) |
| Data Collection | None | Collects device details, IP address, usage logs, file metadata |
| Account Required? | Yes (for license activation) | |
| Watermarks | Never | Yes (after 20 free exports) |
| Offline Capability | Full offline after initial model download | Full offline (after install + license activation) |
| Best For | Any device + zero cost + maximum privacy | Desktop-only users who need heavy-duty batch OCR workflows |
Privacy and Data Collection Comparison
DeckEdit: Files are processed 100% locally in your browser. Zero network data transmission. No server logs. No device fingerprinting. No usage tracking. No file metadata collection. Your documents never leave your device under any circumstances.
PDNob: While OCR processing happens locally after installation, Tenorshare's privacy policy states the application collects device details (model, OS version), IP address, usage logs, and file metadata. This data is transmitted to Tenorshare's servers. The application also requires internet connectivity for license validation.
Pricing Comparison
DeckEdit is 100% free with no limits, no watermarks, and no credit system. Unlimited conversions forever. The founders (Keith Li and Roy Law, CEO and co-founder of TeamNote, a Y Combinator-backed company) are committed to keeping DeckEdit free. Future sustainability comes from non-intrusive advertising, not paywalls or licenses.
PDNob offers a free trial with significant limitations (watermarks, weekly OCR cap, batch limits). To remove these restrictions, you must purchase either an annual license at $44.99/year or a one-time lifetime license at $59.99. There is no middle ground — you either accept the trial limitations or pay for a full license.
When to Choose Each Tool
Choose DeckEdit when you want instant access from any device without installation, need unlimited free conversions with no watermarks, prioritize maximum privacy with zero data collection, work across multiple platforms (Windows, Mac, Linux, Chromebook), or need a tool that works in restricted IT environments where installing software is not allowed.
Choose PDNob when you specifically need a desktop application for heavy-duty batch OCR workflows, prefer a native desktop interface, and are willing to pay $45–60 for a license after the limited free trial.
More Guides
DeckEdit vs Alai: Which Tool Should You Use for NotebookLM Slides?
DeckEdit is 100% free and processes locally. Files never leave your device and your original slide design is preserved exactly. Alai uses cloud AI to redesign slides with new layouts, requires an account, consumes credits, and adds watermarks on the free tier.
DeckEdit vs NBLM2PPTX: Zero-Config vs Developer Tool for NotebookLM Slides
DeckEdit is a zero-config browser tool. Visit the site, drop in your PDF, download your PPTX. No installation, no API keys, no cost. NBLM2PPTX is an open-source CLI requiring Python, a Gemini API key, and cloud processing with per-token costs.
DeckEdit vs NoteSlide (Codia AI): Which NotebookLM Converter Should You Use?
DeckEdit is 100% free and preserves your original slide design exactly using local OCR. Files never leave your device. NoteSlide (Codia AI) uses cloud AI to rebuild slides from scratch, altering layouts and fonts, with only 1 free conversion before requiring payment.