PDF tools are a $500M+ market because email, document workflows, and government portals all run on PDF — and almost every PDF needs at least one operation: merge, split, compress, convert, or sign. We tested 13 of the most-used free PDF tools on the same 5-task workflow to see which ones genuinely deliver and which ones are paid tools dressed as free.
Disclosure: this comparison lives on ShrinkTo, so we naturally rank our own tool well. We've been honest about where competitors win — Adobe Acrobat is still better for Word/Excel conversions, iLovePDF has more total tools, and PDF24's desktop app handles unlimited file sizes that no browser-based tool can. Read past the rankings.
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27 PDF tools running entirely in your browser. Real AES encryption, no daily limit, no signup, no upload.
Side-by-side comparison (13 tools)
Quick scan of what each tool offers. ShrinkTo (our tool) is highlighted at the top — full reviews of all 13 are below.
| Tool | Type | Free tier | Privacy |
|---|---|---|---|
| ShrinkTo ⭐ | Browser-based | Unlimited, no signup | Browser-only (no upload) |
| iLovePDF | Online (server-based) | ~5 tasks/session, 15 MB/file | Files uploaded to Barcelona, deleted in 2 hours |
| SmallPDF | Online (server-based) | 2 tasks/day | Files uploaded, deleted in 1 hour |
| PDF24 | Web + desktop app | Unlimited | Web uploads; desktop is fully offline |
| Sejda | Online + desktop | 3 tasks/day, 200 pages, 50 MB | Files uploaded, deleted within 5 hours |
| PDFsam Basic | Desktop (Win/Mac/Linux) | Fully free | Fully offline |
| Adobe Acrobat online | Online (server-based) | Limited free use | Files uploaded to Adobe |
| Stirling-PDF | Self-hosted (Docker) | Fully free | Self-hosted (your server) |
| PDF2Go | Online (server-based) | Reasonable free tier | Files uploaded, deleted within 24 hours |
| Foxit Online | Online (server-based) | Limited free use | Files uploaded to Foxit |
| DeftPDF | Online (server-based) | Reasonable free tier | Files uploaded, retention varies |
| PDFescape | Online + desktop | Reasonable free tier | Files uploaded |
| ComfortablePDF | Online (server-based) | 24+ tools free, no signup | Files uploaded, auto-deleted in 2 hours |
How we tested
Each tool was tested on the same 5-task workflow: compress a 4.2 MB scanned PDF, merge two documents, split out 3 pages, convert page 1 to Word, and add a password. We measured: feature depth, free-tier limits, privacy model, output quality, and signup friction.
Best tool for each use case
The "best" tool depends entirely on what you're optimising for. Pick from this list rather than reading every review.
Detailed reviews (13 tools)
ShrinkTo Our pick
shrinkto.com/all-typesBest for: Privacy-conscious users and anyone tired of daily limits
27 PDF tools running entirely in-browser. Real AES password encryption (most browser tools fake it), exact-KB compression, OCR in 8 languages including Hindi/Tamil/Telugu/Bengali. Not as polished as SmallPDF and lacks cloud integration, but no daily limits and your file never uploads.
- ✓ 27 tools in one place
- ✓ Browser-only privacy
- ✓ Real AES encryption
- ✓ No daily limit
- ✓ Hindi/Tamil/Telugu OCR
- ✕ Files >50 MB strain browser
- ✕ No Google Drive / Dropbox pull
- ✕ Word/Excel conversion loses complex formatting
iLovePDF
ilovepdf.comBest for: Users who need many PDF tools in one polished interface
The most popular PDF tool site in the world for good reason — 25+ tools, polished interface, decent free tier. The 15 MB file cap and session limits push power users toward the $7/month Premium tier. Files upload to servers in Spain.
- ✓ 25+ tools available
- ✓ Polished interface
- ✓ Cloud integration (Drive, Dropbox)
- ✕ 15 MB free file limit
- ✕ Session task limit
- ✕ Files uploaded to servers
- ✕ Heavy paid-tier nag
SmallPDF
smallpdf.comBest for: Polished single-task interface for occasional users
Probably the most polished PDF tool UI in this comparison. Compression and conversion quality are excellent. The catch is the 2-tasks-per-day free tier — strictest of any major tool. Hit it once, wait 24 hours.
- ✓ Best UI in the category
- ✓ 21+ tools
- ✓ Mobile apps for iOS/Android
- ✕ 2 tasks/day free limit (strictest)
- ✕ Files uploaded
- ✕ Pushes paid tier hard
PDF24
pdf24.orgBest for: Power users who want a desktop app with no limits
German-made, free for over 15 years. The desktop app (Windows/Mac) is the standout — 25+ tools, no file size limit, no daily limit, fully offline. The web version uploads to servers but has no usage caps. Genuinely free, ad-supported.
- ✓ Desktop app fully offline
- ✓ No daily/file size limits
- ✓ 25+ tools
- ✓ Genuinely free forever
- ✕ Dated interface
- ✕ Bundled installer suggests adware (decline)
- ✕ Web version uploads files
Sejda
sejda.comBest for: Mid-volume PDF editing with batch support
Sejda's free tier is a good middle ground — more generous than SmallPDF (3 tasks vs 2/day) but more restrictive than PDF24. Their PDF editor is one of the best free options for actually editing text in a PDF, not just adding annotations on top.
- ✓ Genuine PDF text editing
- ✓ Desktop app available
- ✓ Reasonable free tier
- ✕ 3 tasks/day free
- ✕ Files uploaded
- ✕ Pro tier ~$7/month
PDFsam Basic
pdfsam.orgBest for: Open-source desktop split, merge, rotate, extract
Open-source desktop tool focused on the core operations: split, merge, rotate, extract, mix. Doesn't try to do everything — but what it does, it does excellently and for free. The Enhanced (paid) version adds OCR and conversion.
- ✓ Open-source (Apache 2.0)
- ✓ Cross-platform
- ✓ Active maintenance for 15+ years
- ✕ Free tier excludes compress, convert, OCR
- ✕ Java-based (needs JRE)
- ✕ Functional UI
Adobe Acrobat online
adobe.com/acrobat/onlineBest for: When PDF compatibility is mission-critical
Adobe makes the PDF format, so their tool produces the most reliably compatible output. Free use is limited (a few tasks before login is required) and the full Acrobat Pro is $19.99/month. Worth the premium for legal documents and high-stakes conversions where compatibility matters.
- ✓ Best output compatibility
- ✓ Excellent Word/Excel/PPT conversion
- ✓ Trusted by enterprises
- ✕ Free use is very limited
- ✕ Pro tier expensive
- ✕ Account/login required quickly
Stirling-PDF
github.com/Stirling-Tools/Stirling-PDFBest for: Developers, teams, organisations wanting self-hosted
The most powerful free tool in this list — 50+ features rivaling Adobe Acrobat Pro. The catch: you self-host it via Docker. Not realistic for individual non-technical users but excellent for IT teams and small organisations.
- ✓ 50+ features (most in this list)
- ✓ Open-source (15k+ GitHub stars)
- ✓ Self-hosted = full privacy
- ✕ Requires Docker / server
- ✕ Not for non-technical users
- ✕ Setup time
PDF2Go
pdf2go.comBest for: Conversion-heavy workflows
Less famous than iLovePDF or SmallPDF but with a more generous free tier. UI is functional, not beautiful. Conversion quality (PDF to Word, etc.) is decent. Good fallback when other tools' free tiers run out.
- ✓ Generous free tier
- ✓ 100 MB file cap
- ✓ OCR included
- ✕ Files uploaded
- ✕ Less polished UI
- ✕ Heavy ads
Foxit Online
foxit.com/pdf-onlineBest for: Foxit Reader users wanting matching online tools
Foxit makes a popular desktop PDF reader; their online tools are an extension. Reasonable feature set, comparable quality to SmallPDF. Best if you already use Foxit's ecosystem.
- ✓ Familiar to Foxit Reader users
- ✓ Solid feature set
- ✓ Cloud integration
- ✕ Free use limited
- ✕ Files uploaded
- ✕ Less generous than PDF24
DeftPDF
deftpdf.comBest for: Users wanting variety without aggressive paywalls
Mid-tier PDF tool site that doesn't push paid plans aggressively. 30+ tools, decent free tier, basic UI. Comparable to PDF24's web tools but with smaller user base.
- ✓ 30+ tools
- ✓ Less aggressive paid-tier nag
- ✓ No signup needed for basic use
- ✕ Less polished than SmallPDF
- ✕ Files uploaded
- ✕ Limited cloud integration
PDFescape
pdfescape.comBest for: Quick PDF form filling and annotation
Specifically good at form filling and annotation — better than most general PDF tools at this. For pure conversion or compression, other tools are better. Worth knowing about for the form-filling niche.
- ✓ Excellent for form filling
- ✓ Good annotation tools
- ✓ Reasonable free tier
- ✕ 10 MB / 100 pages free limit
- ✕ Files uploaded
- ✕ Compression is basic
ComfortablePDF
comfortablepdf.comBest for: Users wanting iLovePDF-style breadth without signup nag
A newer tool that consciously offers what iLovePDF used to — many tools, no signup, no aggressive paywalls. Quality is comparable to mid-tier alternatives. Worth bookmarking as an alternative when iLovePDF gets annoying.
- ✓ 24+ tools, no signup
- ✓ Less aggressive paywall
- ✓ Clean modern UI
- ✕ Files uploaded
- ✕ Smaller user base
- ✕ No mobile app
Frequently asked questions
What is the best free PDF tool in 2026?
Is iLovePDF or SmallPDF better?
Are browser-based PDF tools as good as desktop apps?
Why do PDF tools upload my files to their servers?
Which PDF tool is safest for sensitive documents?
Can I really get unlimited free PDF processing?
Why does Adobe Acrobat Pro cost $20/month when free tools exist?
- Tested in May 2026 against the workflow described in "How we tested"
- Free tier limits verified directly on each tool's pricing/limits page
- Privacy claims for server-based tools sourced from each provider's published privacy policy
- Browser-only privacy verified via Chrome DevTools Network tab
Last verified: January 8, 2026. Tools update their offerings frequently — verify current limits before committing to a workflow.
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