KOIAE vs Sejda: Which PDF Tool Is Better in 2026?
If you regularly edit and convert PDF files, you may be comparing online tools such as KOIAE and Sejda. Both let you work with PDFs directly in a web browser and both offer a range of document tools.
So which one is better for your needs: KOIAE or Sejda?
In this guide, we compare KOIAE vs Sejda based on the tools, features, and approach of each platform.
KOIAE vs Sejda: Quick Comparison
| Feature | KOIAE | Sejda |
|---|---|---|
| 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 |
| OCR PDF | Yes | Yes |
| Edit PDF | Yes | Yes |
| Sign PDF | Yes | Yes |
| Fill PDF forms | Yes | Yes |
| Total tools | 41+ tools | Broad PDF toolset |
| Works in browser | Yes | Yes |
| Desktop app | Browser-based | Yes (Sejda Desktop) |
| Free essential tools | Yes | Free with hourly/size limits |
KOIAE currently advertises 41+ browser-based PDF tools and keeps its essential tools free forever. Sejda is a well-known PDF editor available both online and as a desktop application, with a free tier that has hourly and file-size limits.
What Is KOIAE?
KOIAE is an online PDF toolkit that runs in a web browser with no installation. It works on Windows, Mac, Android, and iPhone.
The KOIAE website lists more than 41 PDF tools, including 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, Sign PDF, Edit PDF, Fill Form, and Excel to PDF.
KOIAE states that its essential tools, such as merging, splitting, and compressing PDFs, are free forever, with no signup and no watermark. Advanced converters, OCR, and security tools are part of KOIAE Premium at $5 per month. KOIAE also highlights 256-bit SSL encryption and automatic file deletion.
What Is Sejda?
Sejda is a popular PDF platform available both as an online service and as a desktop application (Sejda Desktop). It is well known for its clean PDF editor and for covering a wide range of PDF tasks.
Sejda's tools include editing, merging, splitting, compressing, converting, signing, filling forms, OCR, and more. Sejda is also known for its privacy approach, stating that uploaded files are deleted automatically after a couple of hours.
Sejda offers a free tier, but it applies limits — for example, a limited number of tasks per hour and caps on document size and page count. Users who need more can upgrade to a paid plan.
PDF Editing
Both platforms offer PDF editing.
Sejda is particularly well regarded for its in-browser PDF editor, which lets you add and edit text, insert images, add links, and work with form fields in a simple interface.
KOIAE provides Edit PDF (add text, images, and drawings on a page), Sign PDF, Fill Form, Crop PDF, and Redact PDF. For changing the underlying text of a text-based PDF, KOIAE suggests converting to Word, editing, and exporting back.
Both cover everyday editing needs; Sejda leans toward a dedicated editor experience, while KOIAE offers editing within a broader 41+ tool toolkit.
PDF Conversion and OCR
Both KOIAE and Sejda convert between PDF and other formats and both offer OCR.
KOIAE supports PDF to Word, Word to PDF, JPG to PDF, PDF to JPG, Excel to PDF, and OCR (marked PRO).
Sejda also supports PDF to Word, Word to PDF, image conversions, and OCR, with limits depending on the free or paid plan.
PDF Compression
Both platforms can reduce PDF file size.
KOIAE includes Compress PDF among its free essential tools, so you can shrink files for email or upload at no cost.
Sejda also offers PDF compression, subject to its free-tier limits on file size and number of tasks.
Free Tier and Limits
This is an important difference.
KOIAE keeps its essential tools (Merge, Split, Compress, and more) free forever, with generous everyday limits and no watermark.
Sejda's free tier is useful but applies stricter limits — typically a small number of tasks per hour and caps on pages and file size — after which you are prompted to upgrade.
For users who want to run many quick tasks without hitting hourly limits, KOIAE's free essentials can be more convenient. For users who want a dedicated editor plus a desktop app, Sejda is attractive.
Security and Privacy
Both platforms emphasize privacy.
KOIAE highlights 256-bit SSL encryption, automatic file deletion, and browser-based processing for most tools, meaning many tasks stay on your device.
Sejda states that uploaded files are automatically deleted after a couple of hours and offers a desktop version that can keep files on your own computer.
Pricing
KOIAE offers free essential tools and Premium at $5 per month for unlocking all tools, larger files, and unlimited conversions.
Sejda offers free access with limits and paid weekly, monthly, or annual plans for higher limits and its desktop application. Check Sejda's current pricing page for exact details.
Which One Should You Choose?
Choose KOIAE if:
- You want a broad 41+ tool PDF toolkit in the browser.
- You need essential tools that are free forever.
- You want to run many quick tasks without hourly limits.
- You want affordable Premium at $5 per month.
- You prefer not to install software.
Choose Sejda if:
- You want a dedicated, polished PDF editor.
- You want both online and desktop versions.
- You are comfortable with a limited free tier.
- You value its short auto-delete privacy approach.
KOIAE vs Sejda: Final Verdict
KOIAE and Sejda are both capable browser-based PDF platforms.
KOIAE focuses on a broad 41+ tool toolkit with free essential features and a simple, affordable Premium plan. It is ideal for users who want a wide range of PDF tools with generous free access.
Sejda focuses on a clean PDF editor and offers both online and desktop versions, with a free tier that has hourly and size limits.
If you want a large, affordable, browser-based toolkit, KOIAE is a strong choice. If you specifically want a dedicated editor with a desktop option, Sejda is worth trying.
Frequently Asked Questions
Is KOIAE better than Sejda?
It depends on your needs. KOIAE offers 41+ tools with free essentials and a $5/month Premium plan, while Sejda offers a polished editor and a desktop app with a limited free tier.
Does KOIAE have a PDF editor?
Yes. KOIAE offers Edit PDF, Sign PDF, and Fill Form tools, along with 41+ other PDF tools.
Is Sejda free?
Sejda has a free tier with limits on tasks per hour, page count, and file size. Paid plans remove these limits and add the desktop app.
Does KOIAE have limits?
KOIAE offers generous free limits on its essential tools, with higher limits and all tools available on Premium at $5 per month.
Conclusion
KOIAE and Sejda both make it easy to work with PDFs online.
KOIAE offers a broad, affordable, browser-based toolkit with 41+ tools and free essential features.
Sejda offers a dedicated PDF editor with online and desktop versions and a limited free tier.
Choose KOIAE for a wide toolkit with generous free access, and choose Sejda if you want a focused editor with a desktop option.
