Document Flare
Local vs cloud: which PDF tool to choose?
PDF tools fall into two categories: cloud services (iLovePDF, Sejda, Smallpdf) that process your files on their servers, and local tools (Document Flare, PDF24, Stirling PDF) that process in your browser. Each approach has advantages and limitations.
Cloud services: advantages
- Power: servers can handle large files and heavy operations (OCR, Office conversion).
- Accessibility: available from any device with internet.
- Feature richness: large services offer many tools.
Cloud services: limitations
- Privacy: your documents are sent to servers. You depend on the service’s privacy policy.
- Network dependency: no internet, no tool.
- Quotas: most limit the number of files or size.
- Ads and upsell: free is often limited to push toward paid plans.
Local tools: advantages
- Absolute privacy: your documents never leave your device.
- Speed: no upload, no queue.
- Offline: works without connection after loading.
- No quotas: no artificial limits.
- Verifiable: you can inspect network traffic.
Local tools: limitations
- Limited power: very heavy operations (advanced OCR) may be slower.
- Browser dependency: requires a modern browser.
- Fewer tools: local tools cover common operations, not always the most specialized ones.
Comparison table
| Criterion | Cloud (iLovePDF, Sejda) | Local (Document Flare) |
|---|---|---|
| Privacy | Documents sent | Documents local |
| Speed | Depends on upload | Immediate |
| Offline | No | Yes |
| Quotas | Yes | No |
| Advanced OCR | Yes | Limited |
| Cost | Freemium | Free |
Recommendation
For common operations (merge, extract, annotate, sign, watermark), a local tool like Document Flare is preferable: faster, more private, and with no quotas. For heavy operations (high-quality OCR, complex Office conversion), a cloud service may be necessary, but choose one that is transparent about its retention policy.
Transparency: this guide is published by Document Flare, a local processing tool. Our comparison aims to be honest, but we have a direct interest in choosing local. Verify the privacy policies of mentioned services yourself.