KOIAE vs PDF24: Which PDF Tool Is Better in 2026?
If you work with PDF files regularly, choosing the right PDF tool can save time and make everyday document tasks much easier. KOIAE and PDF24 are two online PDF platforms that offer tools for merging, splitting, compressing, converting, editing, protecting, and managing PDF files.
But which one is better?
In this guide, we compare KOIAE vs PDF24 based on the features currently available on their official websites.
KOIAE vs PDF24: Quick Comparison
| Feature | KOIAE | PDF24 |
|---|---|---|
| PDF tools | 41+ tools | Extensive tool collection |
| Merge PDF | Yes | Yes |
| Split PDF | Yes | Yes |
| Compress PDF | Yes | Yes |
| PDF to Word | Yes | Yes |
| Word to PDF | Yes | Yes |
| JPG to PDF | Yes | Yes |
| PDF to JPG | Yes | Yes |
| PDF to Excel | Optional | Yes |
| PDF to PowerPoint | Optional | Yes |
| OCR PDF | Yes | Yes |
| Rotate PDF | Yes | Yes |
| Unlock PDF | Yes | Yes |
| Protect PDF | Yes | Yes |
| Watermark PDF | Yes | Yes |
| Edit PDF | Yes | Yes |
| Sign PDF | Yes | Yes |
| Compare PDF | Yes | Yes |
| Redact PDF | Yes | Yes |
| Fill PDF forms | Yes | Yes |
| Desktop software | Browser-based | PDF24 Creator |
| Offline processing | No | Yes, with PDF24 Creator |
| Registration required | No for essential tools | No |
| Free access | Essential tools free | 100% free |
KOIAE currently advertises 41+ PDF tools, including common PDF conversion, compression, security, OCR, and document-management tools.
PDF24 offers a very extensive collection of online PDF tools. Its official tools page lists PDF conversion, editing, signing, OCR, security, page management, forms, comparison, redaction, and many other functions.
What Is KOIAE?
KOIAE is an online PDF toolkit designed to help users perform common PDF tasks directly from a web browser.
The KOIAE website currently advertises 41+ PDF tools. Its highlighted tools include Merge PDF, Split PDF, Compress PDF, PDF to Word, Word to PDF, JPG to PDF, PDF to JPG, Rotate PDF, Unlock PDF, Protect PDF, Watermark PDF, OCR PDF, and Excel to PDF.
KOIAE also promotes browser-based use, mobile compatibility, no software installation, and security features such as 256-bit SSL encryption and automatic file deletion.
Its essential PDF tools are presented as free, while some advanced tools are marked as PRO.
What Is PDF24?
PDF24 is a large collection of online PDF tools operated by Geek Software GmbH.
The official PDF24 website describes its online tools as free and easy to use. The platform includes tools for merging, splitting, compressing, editing, signing, converting, protecting, unlocking, rotating, watermarking, OCR, comparing, redacting, and organizing PDF files.
PDF24 also provides a separate desktop application called PDF24 Creator for Windows. The Creator brings many PDF24 functions to the user's computer and allows files to remain locally on the PC when working offline.
PDF to Word: KOIAE vs PDF24
Both KOIAE and PDF24 provide PDF to Word functionality.
KOIAE currently lists PDF to Word among its PDF conversion tools.
PDF24's official tools page specifically lists both PDF to Word and PDF to DOCX, along with PDF to PowerPoint, PDF to Excel, PDF to ODT, PDF to ODS, PDF to ODP, PDF to Text, PDF to RTF, PDF to EPUB, PDF to HTML, and PDF to PDF/A.
This makes PDF24 particularly useful for users who need to convert PDFs into several different document formats.
PDF Compression
PDF compression is available on both platforms.
KOIAE provides a dedicated Compress PDF tool as part of its PDF toolkit.
PDF24 also provides Compress PDF and lists it among its frequently used tools. The service is designed to reduce PDF file size while keeping the document usable.
For everyday tasks such as reducing a file before email or online upload, both platforms can be useful.
PDF Conversion
PDF conversion is one of the areas where PDF24 has a particularly extensive tool collection. PDF24 currently lists conversions such as:
- Word to PDF
- PowerPoint to PDF
- Excel to PDF
- JPG to PDF
- PNG to PDF
- WEBP to PDF
- HEIC to PDF
- SVG to PDF
- TIFF to PDF
- ODT to PDF
- ODS to PDF
- ODP to PDF
- Text to PDF
- RTF to PDF
- EPUB to PDF
- Markdown to PDF
It also supports conversions from PDF to Word, DOCX, PowerPoint, PPTX, Excel, XLSX, ODT, ODS, ODP, Text, RTF, EPUB, HTML, PDF/A, and images.
KOIAE also supports several important PDF conversions, including PDF to Word, Word to PDF, JPG to PDF, PDF to JPG, and Excel to PDF.
If you regularly convert between many different formats, PDF24 currently offers a very broad conversion selection.
OCR PDF
OCR is useful when you need to work with scanned documents.
KOIAE provides an OCR PDF tool as part of its PDF toolkit.
PDF24 also provides PDF OCR, which can recognize text in PDF and image files and create PDFs with a text layer. The feature is available both online and through PDF24 Creator.
Both platforms can therefore be useful for scanned-document workflows.
PDF Editing
PDF24 provides a dedicated online PDF editor. Its official editor allows users to add elements such as text and images and draw directly on a PDF. It works through the browser without requiring installation. PDF24 also has a separate annotation tool that allows users to highlight PDFs and add text, images, shapes, or freehand drawings.
KOIAE also offers dedicated editing tools, including Edit PDF, Sign PDF, Fill Form, Crop PDF, and Redact PDF, alongside its broader toolkit for merging, splitting, compression, conversion, rotation, watermarking, OCR, and PDF security.
For users who specifically need PDF editing and annotation, both platforms provide capable tools.
PDF Signing and Security
PDF24 includes a dedicated Sign PDF tool along with Protect PDF, Unlock PDF, Redact PDF, and other security-related tools.
KOIAE also provides Sign PDF, PDF protection, unlocking, redaction, and watermark tools, with several of the advanced ones currently marked as PRO.
If your main goal is protecting or managing PDF files, both platforms provide useful options.
PDF Comparison
PDF24 has a dedicated Compare PDFs tool. This can be useful when you have two versions of a document and want to identify differences.
KOIAE also provides a Compare PDF tool that highlights the differences between two versions of a document, so both platforms cover this workflow.
Fill and Create PDF Forms
PDF24 provides tools for filling and creating PDF forms. Its Fill out PDF tool allows users to add text, images, shapes, and drawings directly in the browser. The all-tools page also lists Create fillable PDF form.
KOIAE also offers a Fill Form tool that detects existing form fields and lets you complete and flatten PDF forms in the browser. Both platforms are therefore useful for applications, forms, and business documents.
Free PDF Tools
One of the biggest differences between KOIAE and PDF24 is their approach to free access.
KOIAE offers essential tools for free and has PRO tools for some advanced functions.
PDF24 states that its online tools are 100% free of charge. It also says there are no artificial limits, no registration requirement, and no forced premium versions.
For users looking for a completely free PDF toolkit, PDF24 has a major advantage.
PDF24 Creator: Offline PDF Tools
One of PDF24's biggest advantages is its desktop application.
PDF24 Creator is a free Windows application that provides many PDF24 tools offline. Files remain on the user's PC instead of being uploaded to the internet when using the offline application. PDF24 Creator includes features such as:
- Merge and split PDFs
- Add, remove, extract, rotate, sort, and move pages
- Convert documents to PDF
- PDF compression
- OCR
- PDF overlay
- PDF printer
- PDF reader
- Password security
- Watermarks
- Page numbers
- Signatures
- Batch processing
One important limitation is that PDF24 Creator is currently available for Windows, while the online PDF24 tools work across common operating systems and browsers.
Security and Privacy
Security is important when working with personal and business documents.
KOIAE highlights 256-bit SSL encryption and automatic file deletion as part of its security approach.
PDF24 states that file transfers to its servers are encrypted and that uploaded files are completely removed after a short period. Individual PDF24 tool pages specify that files are automatically deleted from the server after one hour.
For users who want maximum control over sensitive files, PDF24 Creator offers an additional advantage because files can remain on the local Windows computer instead of being uploaded to the online service.
KOIAE vs PDF24: Which One Is Better?
Choose KOIAE if:
- You want a modern browser-based PDF toolkit.
- You need common PDF tools.
- You need PDF to Word.
- You need Word to PDF.
- You need PDF compression.
- You need JPG/PDF conversion.
- You want essential tools available for free.
- You prefer not to install desktop software.
Choose PDF24 if:
- You want a very large collection of PDF tools.
- You want PDF tools that are completely free.
- You need PDF to Word, Excel, or PowerPoint.
- You need PDF editing and annotation.
- You need PDF comparison.
- You need PDF forms.
- You want OCR.
- You want PDF signing and redaction.
- You want an offline PDF solution.
- You use Windows and want PDF software that keeps files locally on your PC.
KOIAE vs PDF24: Final Verdict
KOIAE and PDF24 are both useful PDF platforms, but their strengths are different.
KOIAE focuses on providing a straightforward online PDF toolkit with 41+ tools covering common PDF tasks such as merging, splitting, compression, conversion, OCR, watermarking, protection, and unlocking.
PDF24 offers an extremely extensive collection of PDF tools and stands out because its online tools are 100% free with no artificial limits. It also provides a powerful free Windows application, PDF24 Creator, for offline PDF processing.
If you want a simple online PDF toolkit, KOIAE is worth trying. If you want a completely free PDF ecosystem with a huge tool collection and offline Windows software, PDF24 is a very strong choice.
Ultimately, the best PDF tool depends on the features you need and whether you prefer online or offline document processing.
Frequently Asked Questions
Is KOIAE better than PDF24?
It depends on your requirements. KOIAE offers 41+ PDF tools and focuses on an online PDF experience, while PDF24 provides an extensive collection of free online tools plus a free Windows desktop application.
Does KOIAE have PDF to Word?
Yes. KOIAE provides PDF to Word conversion.
Does PDF24 have PDF to Word?
Yes. PDF24 officially lists PDF to Word and PDF to DOCX among its conversion tools.
Is PDF24 really free?
Yes. PDF24 states that its online tools are 100% free of charge, with no artificial limits and no registration requirement.
Does PDF24 have an offline version?
Yes. PDF24 Creator is a free Windows desktop application that allows PDF processing offline, with files remaining on the user's PC.
Does PDF24 have OCR?
Yes. PDF24 provides PDF OCR for recognizing text in PDF and image files.
Which is better for free PDF tools?
PDF24 has a strong advantage if completely free access is your priority because its official website states that all PDF24 online tools are free without artificial limits. KOIAE also offers free essential tools, while some advanced KOIAE tools are marked PRO.
Conclusion
KOIAE and PDF24 both provide useful solutions for working with PDF files online.
KOIAE offers a straightforward browser-based PDF toolkit with 41+ tools and covers many everyday PDF tasks.
PDF24 goes further with a very large collection of completely free online tools, extensive conversion options, PDF editing, OCR, comparison, forms, security tools, and the free PDF24 Creator desktop application.
For users who want simple online PDF tools, KOIAE is a good option to consider. For users who want maximum free functionality, extensive PDF tools, and offline Windows software, PDF24 is an excellent alternative.
Both platforms are worth trying, and the right choice depends on your workflow and the PDF features you use most often.
