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Smallpdf VS StlFixTool

Compare Smallpdf VS StlFixTool and see what are their differences

Smallpdf

PDF document management and conversion suite

Rating
0 reviews
Alternatives Is it good?
StlFixTool

Convert and repair 3D and CAD files online — STEP, STL, OBJ, GLB and 3MF. Every job is verified for watertightness and solid count, with a free 3D preview before you pay per file.

Rating
0 reviews
Pricing
Freemium Free trial $2.99 / Usage
Alternatives Is it good?
Rclone UI
The cross-platform GUI for Rclone. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Smallpdf seems to be more popular. It has been mentioned 38 times since March 2021.

social mentions
38 vs 0
PDF Tools popularity
100% vs 0%
alternatives listed
240+ vs 11

Base details

Website, pricing, platforms and company facts side by side.

Smallpdf
StlFixTool
Website smallpdf.com stlfixtool.com
Pricing
Official pricing
Freemium Free trial $2.99 / Usage Official pricing
Listed in
PDF Tools PDF Creator File Sharing PDF Editor +1
Design Tools CAD 3D Modeling 3D File Conversion +2

About Smallpdf and StlFixTool

In their own words, as submitted to SaaSHub.

Smallpdf
StlFixTool

No description of Smallpdf yet.

StlFixTool converts and repairs 3D and CAD files in the browser, with no installation and no account. It handles STEP to STL, STL to STEP, OBJ, GLB/glTF and 3MF in both directions, plus mesh repair for holes, non-manifold edges, duplicate faces and inconsistent normals. What separates it from...

Read more about StlFixTool

Features and specs

What each product offers, as listed by its team.

Smallpdf 6 features
StlFixTool 14 features
  • 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

  • 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.
  • Input formats
    STL, STEP, STP, OBJ, GLB, glTF, 3MF
  • Output formats
    STL, STEP, OBJ, 3MF
  • Pre-payment verification
    Watertightness, manifold edges, solid count and triangle count reported before you pay
  • Free 3D preview
    Inspect the actual converted result in the browser before purchasing
  • Mesh repair
    Holes, non-manifold edges, duplicate and degenerate faces, inconsistent normals
  • Assembly handling
    Solids kept topologically separate, so interface geometry is not lost to vertex welding
  • Viewers
    Free browser viewers for STL, STEP and 3MF
  • Editor
    Free browser STL editor — scale, rotate, mirror, export
  • Maximum file size
    50 MB for STL, 100 MB for STEP
  • Output units
    Millimetres
  • Pricing
    $2.99–$5.99 per file, one-time, no subscription
  • Account
    Not required
  • File Retention
    1 hour if unpurchased, 7 days after purchase
  • Payments
    Processed by Paddle as merchant of record

Analysis

An editorial look at what each product does well and who it suits.

Smallpdf
StlFixTool

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.

No analysis of StlFixTool yet.

Videos

Walkthroughs and reviews on video.

Smallpdf 3 videos + Add
StlFixTool 0 videos + Add

smallpdf tutorial video

More videos

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

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

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Smallpdf
StlFixTool
100% 100%
PDF Tools
0% 0%
0% 0%
Design Tools
100% 100%
100% 100%
PDF Editor
0% 0%
0% 0%
CAD
100% 100%

Questions & Answers

As answered by people managing Smallpdf and StlFixTool.

Which are the primary technologies used for building your product?

StlFixTool's answer:

  • Python / FastAPI
  • OpenCascade (OCP) for STEP processing
  • trimesh, numpy, pymeshlab and admesh for mesh analysis and repair
  • Three.js for in-browser 3D viewing
  • Paddle for payments

What makes your product unique?

StlFixTool's answer:

Every conversion is verified before you download it. StlFixTool checks the output against the input (volume, bounding dimensions, watertightness) and shows you the result, including any simplification it applied. It doesn't hand you a file and hope. Multi-part assemblies keep each solid's topology separate, so parts don't get fused or broken at their boundaries. You pay per file, with no subscription and no account plan to cancel.

Why should a person choose your product over its competitors?

StlFixTool's answer:

If you only need one file converted or repaired, you shouldn't need a monthly plan. StlFixTool charges per file ($2.99–$5.99), shows a 3D preview and a verification report before you pay, and outputs in millimetres. The viewers and the STL editor are free. Uploads are deleted automatically: after 1 hour if unpaid, after 7 days once paid.

How would you describe the primary audience of your product?

StlFixTool's answer:

People who need a 3D file in a different format or a broken mesh fixed, without installing CAD software. That's mostly 3D printing hobbyists and makers turning STEP/3MF/OBJ/GLB files into printable STL, people whose slicer rejects a model as non-manifold or full of holes, and engineers or designers who need an STL turned back into a STEP file for a CAD tool.

What's the story behind your product?

StlFixTool's answer:

StlFixTool started as a simple question: why does converting one CAD file mean a subscription or a desktop install? Building it turned out to be harder than it looked. The worst bug was a vertex-welding step that silently merged points across separate solids in an assembly, which broke closed parts without any visible error. That bug is why every conversion now runs an automatic verification check before delivery. The full write-up is on dev.to: "The vertex weld that silently broke every assembly I converted".

User comments

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

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Smallpdf no reviews yet
StlFixTool no reviews yet

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We have no reviews of StlFixTool yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Smallpdf 38 mentions
StlFixTool 0 mentions

View more

Tracking StlFixTool since Oct 2026.

Alternatives to Smallpdf and StlFixTool

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

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