Comparison
pdf2sign vs Adobe Sign
Adobe Sign (now formally Adobe Acrobat Sign) is the e-signature product from the company that invented PDF. pdf2sign is a free browser tool. Both sign PDFs. One has an Acrobat subscription attached, the other has zero cost. Here's when each one is the right call.
TL;DR
Use pdf2sign when
- You're signing your own PDF and sending it back
- You don't want an Adobe subscription
- You care about not uploading the document anywhere
- You need something that works on any device without installs
Use Adobe Sign when
- You already pay for Acrobat Pro and want it integrated
- You need certificate-based qualified e-signatures (EU QES)
- You're running high-volume multi-party workflows
- You need compliance certifications (SOC 2, HIPAA, 21 CFR Part 11)
Feature comparison
| pdf2sign | Adobe Acrobat Sign | |
|---|---|---|
| Price | Free forever | $15–30/mo (part of Acrobat Pro or standalone) |
| Free trial | N/A (it's free) | 14 days |
| Account required | No (optional) | Yes (Adobe ID) |
| Desktop install required | No — runs in browser | No for Sign; yes for full Acrobat Pro |
| Where PDFs are processed | Browser, never uploaded | Adobe cloud servers |
| Sign yourself | Yes | Yes |
| Request signatures from others | No | Yes |
| Multi-party sequential signing | No | Yes |
| Certificate-based digital signatures (EU QES) | No | Yes (Advanced tier) |
| Audit trail | No | Yes (tamper-evident) |
| Form-field preservation on save | Yes (pdf-lib merge) | Yes |
| Works on iPhone, Android | Yes (any browser) | Yes (app + browser) |
| Compliance (SOC 2, HIPAA, 21 CFR) | No | Yes (Enterprise tier) |
Where Adobe Sign is worth the subscription
Adobe Sign shines when signing is a business process, not a personal errand. Multi-party contracts with a fixed signing order, templates you reuse across hundreds of deals, webhooks into your CRM so Salesforce closes the deal automatically when the last signature lands — all of that is Adobe's territory. Plus, if you need a qualified electronic signature under EU eIDAS (think: lawyer-grade, notary-equivalent signatures), Adobe Sign's Advanced tier is one of the few products that issues them.
Another Adobe-specific advantage: if your team is already on Acrobat Pro, Sign integrates directly into the Acrobat UI you already know. No separate tool to learn.
Where pdf2sign is faster
For the everyday case — you received a PDF, you need to sign it, you need to send it back — pdf2sign removes friction:
- No Adobe ID to create or log into
- No subscription to think about
- No cloud upload (and no permission to download your file from Adobe's storage)
- Works instantly on any device you already have a browser on — your phone, your friend's laptop, a school computer
Typical scenarios pdf2sign handles better: signing a freelance contract, a permission slip, a rental form, a doctor's intake sheet, an insurance form. For these, you're signing on your own behalf; no audit trail is being demanded by the other party.
Privacy posture
Adobe Sign processes your PDF on Adobe's servers. That's fine for the vast majority of business use — Adobe is a large, compliant, audited vendor. It's not fine if you'd rather no third party have a copy of your document at all (financial statements, medical records, internal legal drafts).
pdf2sign never sees your PDF. The file stays in your browser tab, gets a signature merged in locally, and downloads to your disk. See the security page for the technical architecture and how to verify it yourself.
Which one should you pick?
Simple decision tree:
- Is this a one-off where you're the only signer? → pdf2sign
- Do you need the other party to countersign through a tool? → Adobe Sign or DocuSign
- Do you need a qualified electronic signature (EU QES)? → Adobe Sign Advanced
- Do you already pay for Acrobat Pro? → might as well use Adobe Sign
- Do you want privacy by architecture (no vendor sees the doc)? → pdf2sign
Frequently asked questions
Is pdf2sign an Adobe Sign alternative?
For individuals signing their own PDFs, yes — pdf2sign is faster, free, and requires no Adobe account. For enterprise workflows with multi-party routing and integration into Adobe Acrobat Pro, Adobe Sign is still the more capable product.
Is Adobe Sign free?
No. Adobe Sign requires either an Acrobat Pro subscription (about $20/month) or a standalone Adobe Acrobat Sign plan starting around $15/month. There is a 14-day free trial.
Do recipients need Adobe software to view a pdf2sign-signed PDF?
No. pdf2sign produces a standard PDF. Anyone can open it in Adobe Reader, Preview, Chrome, Edge, Firefox, or any PDF viewer. No proprietary wrapper.
Will pdf2sign preserve form fields in my PDF?
Yes. pdf-lib (which pdf2sign uses under the hood) does a proper PDF merge that keeps form fields, bookmarks, and metadata intact. Some lighter browser signers strip form fields on save; pdf2sign does not.
Can I get a certificate-based digital signature like Adobe Sign's advanced tier?
Not today. pdf2sign produces a drawn/typed/uploaded visual signature embedded into the PDF. For qualified electronic signatures (QES) under EU eIDAS that require certificate-based trust, you need Adobe Sign, DocuSign, or a certified trust-service provider.
Can I sign a PDF without installing Adobe Reader?
Yes — that is the whole point. pdf2sign runs in any browser. You do not need Adobe Reader, Acrobat, Acrobat Pro, or any desktop software at all.