ComparisonMarch 16, 2026·6 min read

ConvertToPDF vs Smallpdf: Speed, Privacy & Features Compared

Smallpdf is one of the most popular PDF tools online. But how does it stack up against a fully browser-based, zero-upload alternative?

Smallpdf is one of the most recognized names in online PDF tools, with over 300 million users. But its free tier has significant restrictions, and its server-based processing raises real privacy questions. Here is a detailed, honest comparison with ConvertToPDF.online.

Feature Comparison

FeatureConvertToPDF.onlineSmallpdf (Free)
PriceFree, alwaysFree (2 tasks/hr) or $12/mo
File Upload❌ None — browser only✓ Files sent to servers
SpeedInstant (local CPU)5–20s (server queue)
Account RequiredNoNo (limited) / Yes (full)
Daily LimitsNone2 tasks/hour on free tier
WatermarksNoneNone on free
JPG to PDF
PDF to JPG
PNG to PDF
PDF CompressComing soon
OCRComing soon✓ (paid)
eSign✓ (paid)
Privacy🔒 Best — zero uploads⚠️ Cloud storage, 1hr deletion
Mobile✓ Full browser support✓ App + browser

Where Smallpdf Wins

Smallpdf offers a much broader tool set — PDF compression, OCR, e-signatures, Word conversion, page editing, and more. If you regularly need these advanced features, Smallpdf's paid plan ($12/month) is reasonable for power users.

Smallpdf's UI is also very polished and has mobile apps for iOS and Android.

Where ConvertToPDF.online Wins

Privacy: This is the biggest differentiator. Smallpdf uploads your files to Amazon S3 or similar cloud storage, retains them for up to 1 hour, and processes them on their servers. ConvertToPDF.online processes everything in your browser — files never leave your device.

Speed: ConvertToPDF.online converts instantly using your own CPU. Smallpdf's free tier queues requests on shared servers — during peak hours, simple conversions can take 15–30 seconds.

No limits: Smallpdf's free tier limits you to 2 tasks per hour. If you hit the limit, you either wait or pay. ConvertToPDF.online has zero limits — convert 100 files in a row if you need to.

Free, forever: ConvertToPDF.online is supported by display advertising. There is no paid tier, no premium features, and no time-limited trials.

Which Should You Use?

For everyday image-to-PDF and PDF-to-image conversions with privacy in mind, ConvertToPDF.online is the better choice — faster, free, and zero-upload.

For advanced PDF editing, OCR, compression, and e-signatures on a regular basis, Smallpdf's paid plan is worth considering.

Try ConvertToPDF.online — no limits, no uploads

Faster than Smallpdf for common conversions, and your files stay private.

Start Converting Free →