Why Compare PDF Tools in 2026?
Online PDF tools all look similar at first, but they differ in where your file is processed, what the free version allows, and how large a file you can use. Picking the wrong one can mean uploading a confidential document you would rather keep on your device, or hitting a file size limit in the middle of a task. This comparison looks at three popular options through what matters most to users: privacy, cost, features and limits.
Key fact: iLovePDF and SmallPDF are long-established, widely used services. Allin PDF is a newer entrant. The biggest practical difference is architecture: Allin PDF processes most tasks on your device, while most online services upload files to their servers.
Head-to-Head Comparison
| Category | Allin PDF | iLovePDF | SmallPDF |
|---|---|---|---|
| Processing | In your browser for local tools; cloud for Office conversion and AI | Server-side | Server-side |
| File upload | Not needed for local tools; cloud tools send the file over an encrypted connection | Files are uploaded to its servers | Files are uploaded to its servers |
| Sign-in | Not needed for local tools; Google sign-in for cloud tools | Varies by plan | Varies by plan |
| Free tier | Local tools unlimited; cloud tools have daily quotas (e.g. PDF to Word 1/day) | Varies by plan | Varies by plan |
| Pro pricing | $9.99/mo or $59.99/yr | Varies by plan | Varies by plan |
| Offline support | Web app needs internet; the iOS app runs local tools offline | Check vendor's apps | Check vendor's apps |
| AI features | AI Document Restore (removes handwriting from scans), Pro AI OCR | Check vendor's site | Check vendor's site |
| OCR | Free in-browser engine (5 languages) + Pro AI OCR | Varies by plan | Varies by plan |
| Platforms | Web + iOS (Android not yet on Google Play) | Web + desktop and mobile apps | Web + desktop and mobile apps |
| File size limit | Free 5MB / Pro 50MB (local tools), 30MB (cloud tools) | Varies by plan | Varies by plan |
| Team features | Not yet | Check vendor's site | Team workspace and eSign |
Competitor plans, quotas and limits change often, so check each vendor's official pricing for current details.
Privacy & Security: The Biggest Difference
The most fundamental difference between these tools is where your files are processed. Allin PDF uses a local-first approach: merge, split, compress, image to PDF, PDF to image, encrypt, unlock, watermark, page management and free OCR all run in your browser using libraries such as pdf-lib, PDF.js and Tesseract.js. For these tools the file stays on your device.
iLovePDF and SmallPDF use the traditional upload-process-download model, so your files are sent to their servers. Each vendor publishes its own file deletion policy; read it before uploading sensitive documents. Allin PDF's cloud tools (PDF to Word/Excel/PowerPoint, Office to PDF and AI Document Restore) also send the file over an encrypted connection. Allin PDF does not store file contents and does not log file names or contents.
- Local-First Architecture
- A software design approach where data is processed on the user's device instead of on remote servers. For PDF tools, this means the file is not uploaded, so it never sits on a third-party server. Allin PDF applies this to all of its local tools.
For sensitive documents such as contracts, financial statements, medical records and legal files, processing on your device removes the upload step entirely, which is one less place your data can be exposed.
Pricing & Value Analysis
| Plan | Allin PDF | iLovePDF | SmallPDF |
|---|---|---|---|
| Free tier | Unlimited local tools, no sign-up; cloud: PDF to Office 1/day, Office to PDF 3/day, AI Restore 1 document (lifetime) | Varies by plan | Varies by plan |
| Monthly | $9.99 | See pricing page | See pricing page |
| Annual | $59.99 (about $5.00/mo) | See pricing page | See pricing page |
| Pro daily quotas | PDF to Office 200/day, Office to PDF 200/day, AI Restore 50/day | Varies by plan | Varies by plan |
Value assessment: if your tasks are mostly merging, splitting, compressing or protecting PDFs, Allin PDF's free local tools may be all you need, with no account. If you regularly convert Office files, work with large files or need team features, compare the current plans of all three before paying. Prices shown are in USD.
Feature Deep Dive
PDF Conversion
All three support PDF to Word, Excel and PowerPoint. Allin PDF uses Adobe PDF Services for these conversions and outputs .docx, .xlsx and .pptx files. Office to PDF uses a LibreOffice-based engine. Both run in the cloud and need sign-in. Conversion results for complex layouts vary with every tool, so test with a sample of your own documents.
PDF Compression
Allin PDF's compression runs in your browser with three levels: Low (lossless cleanup), Medium (images re-encoded, longest edge up to 2000px) and High (images re-encoded more strongly, longest edge up to 1400px, metadata removed). Image-heavy PDFs shrink the most; text-only PDFs shrink little. iLovePDF and SmallPDF compress on their servers, so the file has to be uploaded and downloaded.
Unique Capabilities
- Allin PDF strengths: AI Document Restore (removes handwriting from scanned pages, one page per run, accepts PDF, JPG and PNG), free in-browser OCR for English, Chinese, Japanese and Korean, AES-256 PDF encryption in the browser, free local tools without sign-up
- iLovePDF strengths: Wide tool range, batch processing, PDF editing and signing tools, desktop and mobile apps
- SmallPDF strengths: Team workspace, eSign workflow, cloud storage integrations, desktop app
Speed and Connectivity
How speed differs: With Allin PDF's local tools there is no upload or download, so processing time depends on your device and the file. Server-based tools, including Allin PDF's own cloud tools, also depend on your connection. The Allin PDF web app cannot be opened without internet; for offline work, use the Allin PDF iOS app.
Skipping the upload matters most on slow or metered connections. Keep in mind that Allin PDF caps files at 5MB on the free plan and 50MB on Pro for local tools, so very large files may need a different tool.
Who Should Choose What?
| Your Priority | Recommended | Why |
|---|---|---|
| File privacy & security | Allin PDF | Local tools process files on your device without upload |
| Offline/travel work | Allin PDF iOS app | Local tools run on iPhone and iPad without internet; the web app needs a connection |
| Occasional basic tasks, no account | Allin PDF | Merge, split, compress and more are free with no sign-up or daily limit |
| Team collaboration & eSign | SmallPDF | Team workspace and signing workflow |
| AI document processing | Allin PDF | AI Document Restore removes handwriting from scans |
| Large files or high-volume batch work | iLovePDF or SmallPDF | Allin PDF limits files to 5MB free / 50MB Pro; compare competitors' current plans |
Final Verdict
Choosing a PDF tool in 2026 is largely about choosing an architecture. If you want everyday tasks done without uploading your files, Allin PDF's local tools are free and need no account, and AI Document Restore is a useful extra for scanned pages. Its limits are real: smaller file sizes, daily quotas and sign-in for cloud tools, and no offline web app. If you work with large files or need team collaboration and signing, iLovePDF and SmallPDF are worth comparing on their current plans.
Our recommendation for sensitive files (contracts, financial reports, medical records): prefer tools that process on your device, so the document never has to be uploaded to a third-party server.