Both CrispPDF and Smallpdf let you add password online. The difference is where the work happens and what it costs you. Here's an honest, side-by-side look at how the two stack up in 2026 — no affiliate links, no sponsored placement.
| Feature | CrispPDF | Smallpdf |
|---|---|---|
| Price | Free forever | Free tier + Pro $9/mo |
| Free-tier limit | Unlimited | 2 tasks per day on free |
| Signup required | Never | Account required for most tools |
| Watermark on output | Never | No watermark |
| File upload | No — runs in browser | Files uploaded to server |
| Works offline | Yes (after first load) | No |
| Open source friendly | Yes — MIT-style terms | Proprietary |
// FAQ
Yes — every CrispPDF tool including Protect PDF is free forever, with no daily task limit, no email gate, and no watermark.
Smallpdf makes sense if your team needs enterprise SSO, audit logs, or batch automation via API. For one-off and freelance work, CrispPDF is usually faster.
Yes — Protect PDF runs locally in your browser. Smallpdf uploads your file to its servers for processing.