Both help with everyday PDF tasks. The difference is whether your documents leave your device.
| Capability | OneDevToolkit | Smallpdf |
|---|---|---|
| File processing | Client-side in the browser | Typically cloud upload workflows |
| Free access | Core tools free, no forced signup | Freemium with limits/plans |
| Developer toolkit | 300+ tools beyond PDF | PDF-focused product suite |
| Privacy posture | Nothing uploaded for core tools | Server processing common |
Choose OneDevToolkit when you need merge, split, compress, unlock, and redact without uploading — plus JSON, image, and security tools in the same privacy-first suite.
Open PDF tools Compress without upload
Competitor names are trademarks of their respective owners. OneDevToolkit is an independent product. See Attributions.