Reviewers report mixed experiences with Smallpdf’s Sign PDF feature, with a roughly even split between positive and negative feedback across 22 mentions. The overall trend shows fluctuating satisfaction over time, with several 5-star reviews highlighting ease of use and reliability, especially among long-term users. However, recurring complaints center on unexpected charges, poor customer support, and limitations in the free version, particularly around signature creation and functionality. Negative feedback spiked in 2025-08, 2026-05, and 2026-08, often tied to billing issues and technical failures. Despite these concerns, many users continue to praise the tool’s simplicity and effectiveness, especially for one-time or occasional use. The feature remains popular for its straightforward interface and free access, though frustrations with monetization and technical glitches have persisted.

What customers praise

Many users appreciate the Sign PDF feature for being simple, fast, and accessible without requiring a paid subscription. Reviewers highlight that the tool works reliably for basic signing tasks and that the interface is intuitive and well-organized. Some users have been loyal for years, praising the consistent performance and enjoyable design. The ability to sign documents quickly without upfront costs is a major draw for those needing occasional use.

What customers said:

  • „I've been using it for 2+ years.“ - Trustpilot · 5★ · ·
  • „I have been a loyal user of SmallPDF for many years now“ - Trustpilot · 5★ · ·
  • „It's asy to use and it has zero cost.“ - Capterra · 5★ · ·

Common complaints

Common complaints include technical issues when creating or uploading signatures, with users reporting errors during the process or being unable to save their signature at all. Several users noted that the free version now restricts signature functionality, forcing them to pay for basic features they previously accessed without cost. Others expressed frustration over unexpected charges and unresponsive support, especially when trying to resolve billing disputes.

What customers said:

  • „I spent 9 € and it doesn't help me save or sign anything“ - Google Play · 1★ · · translated · Italian ·
    „I spent 9 € and it doesn't help me save or sign anything“

    Original„ho speso 9 € e non mi fa ne salvare ne mettere firme“

  • „Instead of showing a tiny bit of human empathy, their support agents (Venus and…“ - Trustpilot · 1★ · ·
    „Instead of showing a tiny bit of human empathy, their support agents (Venus and Shannen) replied with cold, copy-pasted templates.“
  • „Highly Money Minded Application.“ - Google Play · 1★ · ·

How it has changed over time

Over time, the Sign PDF feature has seen a shift in user sentiment, with early praise giving way to growing frustration. In 2025 and 2026, multiple 1-star reviews cited new restrictions in the free tier, suggesting that features once available at no cost now require payment. The introduction of mandatory payment details even for trial access and the sudden removal of free functionality have contributed to declining trust. However, some users still report positive experiences, particularly in 2026-02, 2026-06, and 2026-03, indicating that the tool remains functional for many.

What customers said:

  • „it started asking me to pay (stating my all free attempts used).“ - Google Play · 1★ · ·
  • „items such as share and menu access are now located at the very top of the screen where…“ - Google Play · 4★ · ·
    „items such as share and menu access are now located at the very top of the screen where my phone status/notifications are“
  • „consistently impressed by how full-featured it is while remaining easy to use“ - Trustpilot · 5★ · ·

Practical takeaways

For occasional users, the free Sign PDF tool remains a practical choice, especially for one-time document signing without the need to commit to a subscription. However, those needing frequent or advanced signing features should be prepared for limitations in the free version and potential costs. Users are advised to test the tool before relying on it for important documents, and to monitor billing details closely to avoid unexpected charges. Support responsiveness remains a concern, so resolving issues may require persistence.

What customers said:

  • „I need to spend more time to get to know Smallpdf better.“ - Capterra · 5★ · ·
  • „Sometimes it crashes but very manageable“ - Capterra · 5★ · ·
  • „I could quickly get the pdf I needed by just signing in, no need to pay anything, it’s…“ - Apple App Store · 5★ · ·
    „I could quickly get the pdf I needed by just signing in, no need to pay anything, it’s optional.“

Over time

Rating trend: 5.0 in 2025-04 to 1.0 in 2026-08.1.01.52.02.53.03.54.04.55.02025-042026-012026-08
Rating trend: 5.0 in 2025-04 to 1.0 in 2026-08.
Data as table
Monthly average rating
MonthAvg. ratingCount
2025-045.001
2025-065.001
2025-081.001
2025-095.001
2025-103.001
2026-015.001
2026-025.002
2026-035.001
2026-051.001
2026-065.002
2026-073.002
2026-081.001

Sentiment over time

Sentiment over time: positive share from 100% (2025-04) to 0% (2026-08).0%25%50%75%100%2025-042026-012026-08
Sentiment over time: positive share from 100% (2025-04) to 0% (2026-08).
Data as table
Monthly sentiment (shares)
MonthPositiveNeutralNegativeCount
2025-04100%0%0%1
2025-06100%0%0%1
2025-080%0%100%1
2025-09100%0%0%1
2025-100%0%100%1
2026-01100%0%0%1
2026-02100%0%0%2
2026-03100%0%0%1
2026-050%0%100%1
2026-06100%0%0%2
2026-0750%0%50%2
2026-080%0%100%1

Customer voices

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

„It does what it's designed to do.“

„the design and function of their product make it actually fun to interact with the tools it offers“

„I only need to use one time for sign a document.“

„Maybe a bit improvement on the signature part“

„I love its organized design and how easy it is to know what to do“

★★★★★Google PlayTranslated· SpanishOriginal
„me encanta su diseño organizado y facil de saber que hacer“

„Impossible to create a signature or initials“

★★★☆☆Apple App StoreTranslated· FrenchOriginal
„Impossible de créer une signature ou initiales“

„the app only showed errors when loading the signature“

★☆☆☆☆Apple App StoreTranslated· SpanishOriginal
„La app sólo arrojó errores al momento de cargar la firma.“

„May God bless the application designers.“

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

What Reddit users discuss

Below are extracts from Reddit which discuss Sign PDF in more detail - each linked to the original thread.

„You can just open it in a tool like Smallpdf“

Cite this page

Citatio (2026). Smallpdf Sign PDF: customer reviews 2026. Retrieved 18 August 2026 from https://citatio.ai/smallpdf-reviews/products/sign-pdf/

Data verifiable via our public audit log: Methodology · Transparency