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Smallpdf VS ConvertUno

Compare Smallpdf VS ConvertUno and see what are their differences

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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Smallpdf logo Smallpdf

PDF document management and conversion suite

ConvertUno logo ConvertUno

Convert and compress video, audio, images and PDFs โ€” entirely in your browser, no uploads. Hardware-accelerated, works offline after your first visit, free with no accounts or size caps.
  • Smallpdf Landing page
    Landing page //
    2023-09-21
  • ConvertUno Drop any file to convert or compress
    Drop any file to convert or compress //
    2026-08-10
  • ConvertUno Lossless repackaging โ€” done in seconds, no re-encode
    Lossless repackaging โ€” done in seconds, no re-encode //
    2026-08-10
  • ConvertUno Compress to a target size
    Compress to a target size //
    2026-08-10
  • ConvertUno PDF tools โ€” merge, split, rotate, compress
    PDF tools โ€” merge, split, rotate, compress //
    2026-08-10
  • ConvertUno Available in 11 languages
    Available in 11 languages //
    2026-08-10

ConvertUno converts and compresses video, audio, images and PDFs entirely on your device โ€” files are never uploaded, because there is no server that could receive them.

How it works: conversions run on WebCodecs, the browser's hardware-accelerated codec API. Videos whose streams already fit the target container are repackaged losslessly in a couple of seconds regardless of size, and the UI says when that happened versus a real re-encode. Formats browsers can't read (AVI, WMV, FLV, VOB, MPGโ€ฆ) fall back to a bundled software engine (~31 MB) that loads only the first time it's needed.

Verified converters: no format pair gets a page unless an automated real-browser test has pushed an actual file through that exact page and checked the output's file signature. If a page exists, the conversion works: https://convertuno.com/blog/how-we-verify-every-converter

Tools:

  • Video & audio conversion โ€” MP4, WebM, MKV, MOV, GIF, MP3, WAV, M4A, OGG, AAC, FLAC
  • Video compression with target size ("fit to 10 MB")
  • Image conversion & compression โ€” HEIC, PNG, JPG, WebP and more
  • PDF: merge, split, rotate, delete pages, compress, extract images, PDF to image
  • Archive extraction

Practical details: free, no accounts, no watermarks, no size caps. Works offline after your first visit. Available in 11 languages. Batch conversion supported.

Smallpdf

Website
smallpdf.com
Pricing URL
Official Smallpdf Pricing
$ Details
-
Platforms
-
Release Date
-
Edit details

ConvertUno

Website
convertuno.com
Pricing URL
-
$ Details
free
Platforms
Online
Release Date
2026 August
Edit details

Smallpdf features and specs

  • User-Friendly Interface
    Smallpdf provides a clean, intuitive, and easy-to-navigate interface, making it accessible for users of all technical levels.
  • Wide Range of Tools
    Offers a variety of tools for PDF editing, including compressing, merging, splitting, and converting PDFs to other formats.
  • Cloud Integration
    Seamlessly integrates with cloud storage services like Google Drive and Dropbox, allowing users to work directly with their files stored online.
  • Security
    Utilizes strong encryption and deletes files from their servers after one hour, ensuring user data is kept secure and private.
  • Cross-Platform Availability
    Accessible from various devices including desktops, tablets, and smartphones with responsive web design.
  • Free Tier
    Provides a free tier with limited features, which is suitable for occasional or basic users.

Possible disadvantages of Smallpdf

  • Limited Free Features
    The free version only allows for two tasks per day and places restrictions on larger files and advanced features, leading to potential inconvenience for frequent users.
  • Subscription Cost
    The premium subscription can be considered expensive for some users, particularly those who only need occasional PDF edits.
  • File Size Limit
    Even with a premium subscription, there are restrictions on the maximum file size that can be uploaded and processed.
  • Internet Dependence
    Requires an active internet connection to use most of its features, which can be a limitation for users with unreliable or slow connectivity.
  • Privacy Concerns
    Despite strong encryption, some users may still have reservations about uploading sensitive documents to an online service.
  • Limited Customization
    The range of customization options for certain tools may be limited compared to more specialized PDF software.

ConvertUno features and specs

  • Hardware Acceleration
    WebCodecs uses your device's hardware encoder when the browser supports it
  • Works Offline
    Works offline after your first visit (legacy formats load the engine once online)
  • Client-Side Processing
    Files never leave your device โ€” there is no upload server

Analysis of Smallpdf

Overall verdict

  • Smallpdf is a reliable and efficient tool for managing PDF documents, suitable for both casual users and professionals. Its combination of versatility, ease of use, and security features makes it a strong contender in the realm of online PDF services.

Why this product is good

  • Smallpdf is considered good because it offers a wide range of PDF tools that are easy to use and accessible online. It provides functionalities such as PDF conversion, compression, editing, and signing, all within a user-friendly interface. This makes it an ideal choice for both individuals and businesses looking for efficient document management solutions. Additionally, it emphasizes security by ensuring encrypted file transfers, which is crucial for handling sensitive information.

Recommended for

  • Individuals who frequently work with PDFs and need a straightforward tool for conversions, compressions, or edits.
  • Students who need to annotate and organize their study materials in a PDF format.
  • Professionals who require a reliable tool for signing documents and collaborating with team members remotely.
  • Businesses looking for secure document management solutions with the flexibility of online access.

Smallpdf videos

+ Add

smallpdf tutorial video

More videos:

  • Review - Smallpdf Review
  • Tutorial - Smallpdf | How to do Unlimited Free Conversions ? | Hack for Smallpdf | Bypass limit of 2 conversion

ConvertUno videos

No ConvertUno videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Smallpdf and ConvertUno)

Smallpdf

ConvertUno

PDF Tools
100 100%
PDF Tools
0% 0
Video Converter
0 0%
Video Converter
100% 100
PDF Editor
100 100%
PDF Editor
0% 0
Productivity
0 0%
Productivity
100% 100

User comments

Share your experience with using Smallpdf and ConvertUno. For example, how are they different and which one is better?
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Reviews

These are some of the external sources and on-site user reviews we've used to compare Smallpdf and ConvertUno

Smallpdf Reviews

Best Free Alternatives to Adobe Acrobat in 2026
Smallpdf is a well-known online PDF platform with a clean interface. It works entirely in the browser and integrates with Google Drive and Dropbox, making it convenient if you store files in the cloud. The free tier limits you to two tasks per hour and adds a watermark on some output files. Files are uploaded to Smallpdf's servers for processing.
Source: universalfiletools.com
Best Online Image Converters in 2026: Docpose.cloud Leads the Pack
Users highlight Docpose.cloudโ€™s reliabilityโ€”no failed conversions even on rare formats. CloudConvert gets praise for quality tweaks but frustrates with daily resets. iLoveIMG is loved for extras like AI, but free limits irk. Smallpdf suits PDF-image hybrids, less pure images. Convertio is straightforward but caps freebies quick.
Source: fileproinfo.com
Ever wondered why bank statements are always in PDF?
Platforms like iLovePDF and Smallpdf are among the most popular choices. They do a decent job for simple PDFs, but I quickly realized a few issues:
Source: medium.com
Top 10 PDF Converters for converting to or from PDF effortlessly
Smallpdf is one of the most well-known PDF converter tools online. Offering a simple, user-friendly interface, it allows users to convert files to and from PDF without any hassle. Smallpdf supports over 18 file types and integrates with Google Drive and Dropbox for easy cloud storage access.
Source: pdf-converter.ai
The 13 Best Free PDF Editors (February 2024)
One of the quickest ways to add images, text, shapes, or your signature to a PDF is with Smallpdf. I find it extremely easy to use for those things, but I opt for one of the editors that top this list if I need to edit the text because this one won't do it for free.
Source: www.lifewire.com

ConvertUno Reviews

We have no reviews of ConvertUno yet.
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Social recommendations and mentions

Based on our record, Smallpdf seems to be more popular. It has been mentiond 38 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Smallpdf mentions (38)

  • OpenDataLoader: Safe, Open, High-Performance โ€” PDF for AI
    According to statistics from smallpdf.com, by 2025, there will be a massive 2.5 trillion PDF documents stored worldwide, and 290 billion new PDF documents will be created every year. - Source: dev.to / 8 months ago
  • Stirling-PDF: local web application to perform various operations on PDFs
    Smallpdf [1] probably deserves a mention here. Not OSS and not self-hosted, but Iโ€˜ve used it occasionally and it has always worked really well. When I was running an agency, we inherited their first office โ€“ very cool folks. [1] https://smallpdf.com/. - Source: Hacker News / over 2 years ago
  • Looking fore college ruled template to print
    And use this one to merge two single-page pdf to make a double side page. Source: over 2 years ago
  • PDF to Excel without O365/Adobe Acrobat?
    I don't have Office 365 for the "Get Data" option, nor do I have Adobe Acrobat. I've tried the smallpdf website but it came out a mess, possibly because my original spreadsheet had highlighted rows and lots of text in some of the cells. Source: over 3 years ago
  • 5 tips to improve your SaaS user onboarding
    Examples of companies doing this well: - SmallPDF users can convert or compress a limited number of files without an account โ€” turning users into advocates and customers once paid use cases comes along; - Freshline uses interactive product demos to help users self-educate and understand the value of their features, without a paywall or registration;. Source: over 3 years ago
View more

ConvertUno mentions (0)

We have not tracked any mentions of ConvertUno yet. Tracking of ConvertUno recommendations started around Aug 2026.

What are some alternatives?

When comparing Smallpdf and ConvertUno, you can also consider the following products

iLovePDF - Premium online PDF tool set

CloudConvert - convert anything to anything - more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

Convertio - File Conversion in the Cloud

Sejda - Split, merge and other powerful PDF tools.

Zamzar - Free conversion online of many type of documents (images, text, video, audio...

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