Comparison
pdf2sign vs Smallpdf
Smallpdf is a Swiss company with 20+ PDF tools — sign, compress, merge, convert, and more — all wrapped in a polished UI. pdf2sign does one thing: sign PDFs, entirely in your browser, with no cap. Here's the honest comparison.
TL;DR
Use pdf2sign when
- You only need to sign PDFs (not compress, convert, OCR, etc.)
- You sign more than 2 PDFs a day (Smallpdf's free cap)
- You don't want the file uploaded to any server
- You want a fully-free tool with no hidden limits
Use Smallpdf when
- You need a toolkit — compress, merge, split, convert — not just sign
- You want a desktop app and a mobile app with offline sync
- OCR for scanned PDFs matters to you
- You want Google Drive / Dropbox integration built in
Feature comparison
| pdf2sign | Smallpdf | |
|---|---|---|
| Free plan signing cap | Unlimited | 2 tasks/day |
| Paid plan start | No paid plan | ~$9/month (Pro) |
| Account required | No (optional) | No for daily-cap free tier; yes for Pro |
| Where PDFs are processed | Browser, never uploaded | Smallpdf cloud (deleted after 1 hour) |
| Sign a PDF | Yes | Yes |
| Compress / merge / split / convert | No | Yes (20+ tools) |
| OCR | No | Yes (Pro) |
| Cloud integrations (Drive, Dropbox) | No | Yes |
| Desktop app | No (it's a web app) | Yes |
| Mobile app | No (works in mobile browsers) | Yes (iOS, Android) |
| Offline signing after page load | Yes | No (requires upload) |
| Works with forms (preserves fields) | Yes (pdf-lib) | Yes |
| Open-source | No (but fully client-side — inspectable) | No |
Where Smallpdf wins
If your PDF needs go beyond signing — you compress scans for email, convert PDFs to Word, OCR a receipt, merge a stack of contract exhibits — Smallpdf is the right call. It's a mature product with Dropbox/Drive hooks, an offline desktop app, iOS and Android apps, and a clean UI. The subscription earns its keep if you use it weekly.
Smallpdf also has a useful free daily slot for occasional use. Two tools a day is enough for the "I need to sign one thing this week" user.
Where pdf2sign wins
If you only sign PDFs, pdf2sign is objectively less friction:
- No daily cap — sign ten PDFs in an afternoon, no upsell modal
- No upload — the PDF stays in your browser, not on a Swiss server
- No account even to unlock more tasks
- Loads in a second; the signing UI opens instantly
Think of it as a focused tool vs a toolkit. Smallpdf's strength is breadth. pdf2sign's strength is that it does one job with zero friction and perfect privacy.
Privacy: the architectural difference
Smallpdf is transparent: your PDF is uploaded to their servers, processed, and deleted "within one hour." For most users that's fine. If you'd rather not have a copy of your contract on a vendor's server for any duration, pdf2sign sidesteps the whole question — nothing is uploaded. See the security page for how to verify this yourself with your browser's DevTools.
Pricing snapshot (as of April 2026)
- pdf2sign — free, unlimited, forever
- Smallpdf free — 2 tasks/day across all tools
- Smallpdf Pro — about $9/month (individual), $12/month (team seat)
Frequently asked questions
Is pdf2sign free like Smallpdf?
pdf2sign is actually free — unlimited documents, no daily cap. Smallpdf's free tier caps you at 2 tasks per day and occasionally nudges you to upgrade. Smallpdf's paid plan is about $9/month.
Does Smallpdf upload my files to a server?
Yes. Smallpdf processes PDFs on its own servers and promises to delete them after an hour. pdf2sign processes files entirely in your browser — the file is never uploaded in the first place.
Why does Smallpdf's free tier have a daily limit?
Smallpdf monetises via subscriptions and enterprise plans, and the daily cap encourages upgrades. pdf2sign's economics are different — we have no server-side PDF costs because all signing runs in the browser, so there's nothing to cap.
Is the output quality the same?
Yes. Both produce standard PDFs. pdf2sign uses pdf-lib for the embed, which preserves form fields, bookmarks, and metadata. The visual signature looks identical.
Can I sign a PDF on my phone with pdf2sign?
Yes, and you don't need to install anything. pdf2sign works in mobile Safari, Chrome, Firefox, and every other modern browser. Smallpdf also works on mobile but pushes you towards its app for heavy use.
Does pdf2sign have other PDF tools like compression or merging?
Not today — pdf2sign is focused on signing. Smallpdf bundles 20+ PDF tools (compress, merge, split, convert, OCR, redact). If you need a general-purpose PDF swiss-army-knife, Smallpdf is worth the subscription.