Feature Comparison
| Feature | FlexFiles | Adobe Acrobat |
|---|---|---|
| Price | Free to start (5 conversions a day); paid plans from $4.99/mo | Paid plans (Standard, Pro, Studio); free Acrobat Reader for viewing |
| No Account Required | Yes, for the conversion tools | Adobe invites you to sign in to its online tools |
| File Size Limit | Up to 5 GB per file | Varies by tool and plan |
| PDF to Word | Free online, within the daily limit | Free online tool; more in paid plans |
| Compress PDF | Free, with three compression levels | Free online tool |
| Merge PDF | Free, up to 3 PDFs per merge | Free online tool |
| Ease of Use | Works online, nothing to install | Online tools plus desktop apps |
| Privacy | HTTPS uploads; signed-in files follow your plan's retention | See Adobe's privacy policy |
| AI Assistant | AI Document Assistant with free weekly quotas (account needed) | AI features such as Chat with PDF |
Which One Should You Use?
Adobe Acrobat is a full PDF suite with desktop apps, advanced editing and its own free online tools. FlexFiles suits people who want quick online conversions, compression and merging without an account, and an AI Document Assistant on a free account. If you work in PDFs all day, Acrobat's paid plans offer more; for occasional jobs, FlexFiles' free tools may be all you need. Acrobat details were checked on adobe.com on 29 October 2026.