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Adobe Acrobat: PDF edit, convert, sign tools vs Signer.Digital Digital Signature, PKI

Adobe Acrobat: PDF edit, convert, sign tools and Signer.Digital Digital Signature, PKI both compete in the same corner of the Chrome Web Store (pdf), but they are built for different users. Adobe Acrobat: PDF edit, convert, sign tools has roughly 311M users and a 4.4-star average; Signer.Digital Digital Signature, PKI sits at about 3M users with 4.2 stars. On pricing, Adobe Acrobat: PDF edit, convert, sign tools is freemium while Signer.Digital Digital Signature, PKI is free.

Adobe Acrobat: PDF edit, convert, sign tools Chrome extension logo

Adobe Acrobat: PDF edit, convert, sign tools

4.4

Do more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools.

Add to ChromeFull review
Signer.Digital Digital Signature, PKI Chrome extension logo

Signer.Digital Digital Signature, PKI

4.2

Digital Signature of eReturns, PDF & Web User Auth, RSA Encryption/Decryption, Certificate Enrollment/Download on Smartcard.

Add to ChromeFull review

Side-by-side comparison

Adobe Acrobat: PDF edit, convert, sign toolsSigner.Digital Digital Signature, PKI
Rating4.4 / 54.2 / 5
Reviews62,90063
Users~311M+~3M+
PricingFreemiumFree
CategoryProductivityPrivacy & Security
DeveloperAdobe, Inc.Chartered Information Systems Pvt. Ltd.
Last updated2026-08-242026-09-01
Best forDo more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools.Digital Signature of eReturns, PDF & Web User Auth, RSA Encryption/Decryption, Certificate Enrollment/Download on Smartcard.

Final recommendation

Pick Adobe Acrobat: PDF edit, convert, sign tools — it leads on both installs and review scores.

Choose Adobe Acrobat: PDF edit, convert, sign toolsChoose Signer.Digital Digital Signature, PKI

Frequently asked questions

Can I install Adobe Acrobat: PDF edit, convert, sign tools and Signer.Digital Digital Signature, PKI at the same time?

Yes, Chrome runs them independently. Keep both only if they do different jobs; if they overlap, pick one, because each active extension adds memory use, page scripts and another set of permissions.

Where do the ratings and install numbers come from?

From each extension's public Chrome Web Store listing. They can lag the live store slightly, and a dash means the figures have not been synced yet.

Keep researching

Alternatives, shortlists and other comparisons in the same category.

Adobe Acrobat: PDF edit, convert, sign tools alternativesClosest replacements for Adobe Acrobat: PDF edit, convert, sign tools, ranked.Signer.Digital Digital Signature, PKI alternativesClosest replacements for Signer.Digital Digital Signature, PKI, ranked.Best Productivity extensionsEvery Productivity extension we track.All comparisonsThe full compare hub, grouped by category.