Cloud and offline PDF editors split on one axis: where the processing happens. That has implications for privacy, speed and reliability.
Here is the honest verdict.
Where cloud wins
Works on any device. No install or update headaches. Easier collaboration. Cheap day passes possible. For most users most of the time, cloud is enough.
Where offline wins
No upload — files never leave your machine. Faster on huge files. Works without network. Required for highly sensitive workflows where uploading is forbidden by policy.
Privacy in practice
Reputable cloud tools (Flint, Smallpdf, Sejda) use encrypted upload and short retention. For most contracts and invoices, that is appropriate. For documents covered by strict policy or regulation, check your firm's rules.
Best for…
Cloud for cross-device flexibility and everyday work. Offline for strict-policy workflows and huge files.
FAQ
Where does Flint process files?
Encrypted upload to managed cloud regions, short retention, secure deletion. See the privacy page for specifics.
Is offline always safer?
Not automatically. An unpatched offline app can be more risky than a well-run cloud service.
Can I run both?
Yes — many users keep an offline tool for huge or sensitive files and a cloud tool for daily work.
Match the architecture to the document's sensitivity. Daily everyday work: Flint.