Reviewers have mixed feelings about Smallpdf’s Sign PDF feature, with 27 negative mentions outweighing 19 positive ones. Many users report serious issues related to unexpected charges, failed sign-ins, and poor customer support, particularly around subscription traps and refund denials. Several reviews from 2025 and 2026 describe being charged unexpectedly after free trials, with some claiming they were never given clear consent or warnings. However, there is a consistent thread of appreciation for the tool’s core functionality, users praise its ease of use, reliability for basic signing tasks, and the fact that it works without requiring an account for simple actions. The feature’s reputation has fluctuated over time, with a sharp drop in ratings during late 2025 and early 2026, followed by a recovery in mid-2026, suggesting recent improvements or changes in user experience. Despite ongoing complaints, a notable number of users still find the tool valuable and worth recommending.

What customers praise

Many users appreciate the Sign PDF feature for being straightforward and effective for basic tasks. They highlight that it works well without requiring an account, which makes it accessible for one-time use. Several reviewers mention it saved them time and effort, especially when submitting documents like assignments or contracts. The tool is also praised for being free and easy to navigate, with a clean interface that makes signing documents simple.

What customers said:

  • „DOES MORE THAN THE BASICS FOR FREE.“ - Trustpilot · 5★ ·
  • „I need to spend more time to get to know Smallpdf better.“ - Capterra · 5★ ·
  • „it is truly very efficient and super easy to handle“ - Google Play · 5★ · · translated · Spanish
    „it is truly very efficient and super easy to handle“

    Original„la verdad es muy eficiente y super sencilla de manejar“

Common complaints

Common complaints center on unexpected charges and subscription traps. Multiple users report being billed for annual subscriptions they never agreed to, even after canceling free trials. Some say the platform automatically enrolled them in yearly plans without clear confirmation. Others describe difficulties with Google sign-in and creating signatures, with some reporting errors when uploading their digital marks. A recurring frustration is the lack of refund support and poor communication from customer service.

What customers said:

  • „they refuse to stop doing it“ - Google Play · 1★ · · translated · German
    „they refuse to stop doing it“

    Original„weigern sich es zu unterlassen“

  • „then they want payment“ - Google Play · 1★ · · translated · Spanish
    „then they want payment“

    Original„luego quieren pláta“

  • „you signed it, that's how it is“ - Google Play · 1★ · · translated · French
    „you signed it, that's how it is“

    Original„vous avez signé, c'est comme ça“

How it has changed over time

The feature’s reputation has seen significant shifts over time. Ratings dropped sharply in 2025, with 1-star reviews in May and August, likely due to widespread issues with billing and account access. The situation improved in early 2026, with 5-star ratings in January through March, suggesting possible fixes or policy changes. However, the rating dipped again in May and June, indicating that problems resurfaced. The most recent reviews in July show a return to high satisfaction, pointing to a recent stabilization or improvement in the user experience.

What customers said:

  • „they refuse to make a refund till date“ - Google Play · 1★ ·
  • „they gave some lame reasons like my account has been active since 2023 and I was not…“ - Google Play · 1★ ·
    „they gave some lame reasons like my account has been active since 2023 and I was not eligible for a free trial“
  • „I think this is a wonderful policy from Smallpdf.“ - Capterra · 5★ ·

Practical takeaways

For users concerned about billing, it’s wise to avoid linking bank details unless absolutely necessary and to monitor trial end dates closely. If charged unexpectedly, reaching out to customer support may still yield results, as one user reported a successful refund and plan change. For those needing only basic signing, the free version works well without an account. However, users should be cautious with Google sign-in and test the signature creation process before relying on it for important documents.

What customers said:

  • „they stopped responding since then. I sent many followup emails but they don't bother…“ - Google Play · 1★ ·
    „they stopped responding since then. I sent many followup emails but they don't bother to respond“
  • „it's free and that gives it an extra advantage“ - Google Play · 5★ · · translated · Spanish
    „it's free and that gives it an extra advantage“

    Original„es gratuita y eso le da un plus“

  • „Can't stop this scammer from deducting money from my bank account.“ - Trustpilot · 1★ ·

Over time

Rating trend: 1.0 in 2025-05 to 5.0 in 2026-07.1.01.52.02.53.03.54.04.55.02025-052026-012026-07
Rating trend: 1.0 in 2025-05 to 5.0 in 2026-07.
Data as table
Monthly average rating
MonthAvg. ratingCount
2025-051.001
2025-063.673
2025-081.003
2025-093.002
2025-102.002
2026-015.001
2026-025.002
2026-035.002
2026-043.002
2026-051.002
2026-063.673
2026-075.002

Sentiment over time

Sentiment over time: positive share from 0% (2025-05) to 100% (2026-07).0%25%50%75%100%2025-052026-012026-07
Sentiment over time: positive share from 0% (2025-05) to 100% (2026-07).
Data as table
Monthly sentiment (shares)
MonthPositiveNeutralNegativeCount
2025-050%0%100%1
2025-0667%0%33%3
2025-080%0%100%3
2025-0950%0%50%2
2025-100%0%100%2
2026-01100%0%0%1
2026-02100%0%0%2
2026-03100%0%0%2
2026-0450%0%50%2
2026-050%0%100%2
2026-0667%0%33%3
2026-07100%0%0%2

Customer voices

Short excerpts - full reviews are available at the original source.

„May God bless the application designers.“

★★★★★Google PlayTranslated· FrenchOriginal
„Que Dieu bénisse les concepteurs de l'application“

„I could quickly get the pdf I needed by just signing in, no need to pay anything, it’s optional.“

„Superb, no messing around signing up“

„You force me to sign up for a free trial.“

★★☆☆☆Google PlayTranslated· GermanOriginal
„you force me to sign up for free trial“

„Ability to make digital signatures“

★★★★★Google PlayTranslated· SpanishOriginal
„poder realizar firmas digitales“

„Signed up 7 days free - but was charged!“

„I've been using it for 2+ years.“

„It does what it's designed to do.“