Smallpdf Merge PDF: customer experiences
Reviewers report that Smallpdf’s Merge PDF feature is generally well-regarded for its speed, simplicity, and reliability, with 25 positive mentions out of 33 total. The overall sentiment remains strongly positive, especially in recent months, as evidenced by multiple 5-star ratings in 2026. However, a small but notable number of users have raised concerns, particularly around functionality issues when handling large files or complex inputs, and some have reported problems with file order, blank outputs, or unexpected subscription charges. While the feature has seen consistent praise for its ease of use and performance, a few negative experiences, especially involving crashes or incorrect merging, have emerged, particularly in early 2025. Despite these isolated issues, the trend shows a steady improvement in user satisfaction, with the highest concentration of positive feedback occurring in late 2026.
What customers praise
Customers frequently praise the Merge PDF tool for its speed and intuitive design. Many highlight that files are combined quickly, even with unstable internet connections, and that the interface clearly shows which files are selected for merging. Users appreciate the ability to exclude unwanted files before finalizing the merge, and several note that the output maintains original quality without any loss. The feature is often described as reliable and efficient, with one reviewer calling it the 'best and faster merge PDF' available.
What customers said:
- „Highly appreciate it“
- „a very good result“
- „The PDFs upload well, it shows which ones I want to merge into one PDF.“
Common complaints
Common complaints center on technical failures when merging large or complex files. Some users report that the app crashes when attempting to combine 150 images or multiple pages, while others note that merged files come out blank or fail to preserve edits and signatures. A few reviewers also mention that PDFs are merged in the wrong order, which can disrupt workflows. These issues appear to affect users handling bulk or mixed-format inputs, suggesting limitations under high load or with specific file types.
What customers said:
- „saves/ shares documents blank“
- „Only after clicking 'merge files' and selecting files does it finally tell you that…“
„Only after clicking 'merge files' and selecting files does it finally tell you that this is only possible after making a subscription.“
Original„Only after clicking "merge files" and selecting files, or finally tells that this is only possible after making a subscription.“
- „When trying to combine 150 photos into a PDF, the application closes.“
„When trying to combine 150 photos into a PDF, the application closes.“
Original„przy próbie połączenia 150 zdjęć w pdf aplikacja się zamyka“
How it has changed over time
The feature’s performance has shown a clear improvement over time. Early 2025 saw several 1-star reviews citing crashes and poor functionality, but these dropped off significantly by mid-2026. The most recent reviews, particularly in June and July 2026, are overwhelmingly positive, with multiple 5-star ratings and no reports of major technical failures. This shift suggests that Smallpdf has addressed earlier bugs or improved server handling, leading to a more stable and dependable merging experience.
What customers said:
- „what a waste of my time“
- „It merges quickly, even when our internet is unstable.“
- „I believe that a monthly renewal option would be more suitable and financially flexible…“
„I believe that a monthly renewal option would be more suitable and financially flexible for users like me.“
Practical takeaways
For users needing occasional merging, the free version offers solid value with no added complexity. Many appreciate the daily free usage limit and the ability to merge files without registration. However, users should be cautious about subscription terms, some have been charged unexpectedly after trials, though support teams have stepped in to resolve these cases. A monthly billing option would improve flexibility, but the current system is manageable for those who monitor their plans closely.
What customers said:
- „It is exactly just what I need from a cost free web application“
- „the customer support team carefully reviewed my case and decided to refund 11 months…“
„the customer support team carefully reviewed my case and decided to refund 11 months instead of charging me for the full 12-month subscription.“
Over time
Data as table
| Month | Avg. rating | Count |
|---|---|---|
| 2025-02 | 5.00 | 1 |
| 2025-03 | 5.00 | 1 |
| 2025-05 | 5.00 | 2 |
| 2025-08 | 5.00 | 1 |
| 2025-09 | 1.00 | 1 |
| 2025-11 | 1.00 | 1 |
| 2025-12 | 5.00 | 1 |
| 2026-02 | 4.20 | 5 |
| 2026-04 | 3.67 | 3 |
| 2026-06 | 5.00 | 4 |
| 2026-07 | 5.00 | 8 |
| 2026-08 | 5.00 | 1 |
Sentiment over time
Data as table
| Month | Positive | Neutral | Negative | Count |
|---|---|---|---|---|
| 2025-02 | 100% | 0% | 0% | 1 |
| 2025-03 | 100% | 0% | 0% | 1 |
| 2025-05 | 100% | 0% | 0% | 2 |
| 2025-08 | 100% | 0% | 0% | 1 |
| 2025-09 | 0% | 0% | 100% | 1 |
| 2025-11 | 0% | 0% | 100% | 1 |
| 2025-12 | 100% | 0% | 0% | 1 |
| 2026-02 | 60% | 0% | 40% | 5 |
| 2026-04 | 67% | 0% | 33% | 3 |
| 2026-06 | 100% | 0% | 0% | 4 |
| 2026-07 | 100% | 0% | 0% | 8 |
| 2026-08 | 100% | 0% | 0% | 1 |
Customer voices
Short excerpts - full reviews are available at the original source.
„Amazing platform to combine multiple files different formats in fraction of seconds“
„THE BEST AND FASTER MERGE PDF“
„Smallpdf.com is really wonderful to merge the files“
„documents are seamlessly merged without loss of quality“
„I can't merge 8 pages“
„Whenever I want to merge jpg or PDF files, I think of this app“
„I was impressed by the speed in merging files“
„Merges pdf files in wrong order.“
What Reddit users discuss
Below are extracts from Reddit which discuss Merge PDF in more detail - each linked to the original thread.
„YSK about smallpdf.com , a website that allows you to convert multiple PDFs to one single merged one“
„1. FileReadyNow · 2. Frn'S PDF Merge · 3. iLovePDF · 4. Smallpdf · 5. PDFsam“
„Smallpdf and its Organize tool includes all features to manipulate PDFs“
Cite this page
Citatio (2026). Smallpdf Merge PDF: customer reviews 2026. Retrieved 18 August 2026 from https://citatio.ai/smallpdf-reviews/products/merge-pdf/
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