PDFFlow vs PDF24 2026

Two genuinely free PDF tools — different approaches to privacy, OCR, and offline use.

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PDFFlow — Best for Privacy

Local browser processing — files never uploaded anywhere. 10 essential PDF tools, no limits, no watermarks, no account.

  • ✓ Files never leave your device
  • ✓ No upload — no data exposure risk
  • ✓ Works on all devices, no installation
  • ✓ Instant processing — no server queue
$0 — Privacy First
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PDF24 — Best for Tool Breadth

25+ PDF tools including OCR, PDF to Word, PDF to Excel, and a Windows desktop application. Files processed on German GDPR-compliant servers.

  • • 25+ tools including OCR
  • • Windows desktop app for offline use
  • • 300MB file size limit
  • • German servers — GDPR compliant
$0 — More Tools
Bottom line: Both PDFFlow and PDF24 are genuinely free with no major restrictions. The key difference is privacy approach: PDFFlow never uploads files; PDF24 processes files on German servers. PDF24 has more tools including OCR. Choose based on whether privacy or tool breadth is your priority.

Full Feature Comparison

FeaturePDFFlowPDF24
PriceFree — no plansFree — ad-supported
Watermarks on OutputNeverGenerally none — rare exceptions
Daily Operation LimitNoneNone on most tools
Signup RequiredNeverNot required
File Upload to ServerNever — local browserYes — German servers (GDPR)
File Size LimitNone300MB per file
Desktop ApplicationWeb onlyWindows desktop app available
PDF to Word (OCR)Not available✓ Available free
PDF to ExcelNot available✓ Available free
Merge PDF✓ Local processing✓ Server-side
Compress PDF✓ No limits✓ No limits
Sign PDF✓ Type or draw✓ Available
Number of Tools1025+
PrivacyFiles never leave deviceUploaded to Germany (GDPR)
Offline UsePartial (after page load)Desktop app works offline

When to Use PDFFlow Over PDF24

Choose PDFFlow when processing documents with sensitive content — legal contracts, financial records, medical information, or personal identification documents. The local processing architecture ensures no data ever reaches a third-party server. PDFFlow is also better for users on corporate networks where outbound file uploads to external services are blocked, and for users who want the fastest possible processing since no upload time is involved.

When to Use PDF24 Over PDFFlow

Choose PDF24 when you need OCR to extract text from scanned documents and convert scans to editable Word or Excel files — these are the primary capabilities PDF24 has that PDFFlow does not. PDF24 is also better for Windows users who want a desktop application for reliable offline operation, and for users who regularly work with very large files that would stress local browser processing on older devices.

Frequently Asked Questions

Is PDF24 completely free?+
Yes, PDF24 is free with no premium tier for most features. It is funded by advertising displayed on the website. PDF24 offers more tools than PDFFlow including PDF to Word OCR, PDF to Excel, and a desktop application. PDFFlow has fewer tools but processes files locally for stronger privacy.
Which has better privacy — PDFFlow or PDF24?+
PDFFlow provides stronger privacy because files never leave your device. PDF24 processes files on German servers subject to GDPR, which provides legal protections but still involves file upload and remote storage. For standard documents, PDF24's GDPR compliance is adequate. For highly confidential documents, PDFFlow's local processing is preferable.
Does PDF24 work offline?+
PDF24 offers a Windows desktop application that works offline after installation. The web version requires internet connection. PDFFlow is web-only but processes files locally — after the initial page load, operations complete even if connectivity drops, giving partial offline capability.
Can PDF24 convert PDFs to Word for free?+
Yes, PDF24 includes free PDF to Word conversion using OCR, which PDFFlow does not offer. For users who regularly need to convert scanned PDFs to editable Word documents, PDF24 is the better choice for that specific feature. For standard PDF operations including merge, compress, and sign, both tools are comparable.
Does PDF24 have a file size limit?+
PDF24 limits file size to 300MB per file on the web version. PDFFlow has no file size limit, though very large files process more slowly on older devices since all computation is local. For files under 300MB — which covers the vast majority of documents — both tools handle them without restriction.

Try PDFFlow — Private, Fast, Completely Free

10 tools · No account · Files never uploaded · Works on any device

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