
Opal.so
Freedom.to
Cold Turkey
Forest App
clearspace
FocusMe
LeechBlock
one sec uses Shortcut automation in order to empower you to spend more time in the real world.

PDF24
PDFsam
DukPdf
iLovePDF
PDF Candy
Bento
Sejda
Process PDF files offline in your browser. Merge, split, compress, and edit PDFs for free. No uploads, no servers, 100% privacy guaranteed.

Which is more popular?
Based on our record, one sec seems to be more popular. It has been mentioned 44 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | one-sec.app | dumpdf.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of one sec yet.
DumPDF Review: Zero-Server, 100% Offline Client-Side PDF Utilities Most free web-based PDF converters require users to upload confidential contracts, tax records, and medical files to remote cloud servers, creating severe security and data-leak liabilities. DumPDF ("Don’t Upload My...
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
The app that makes Elon Musk cry — One Sec app setup & review
More videos
No DumPDF videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing one sec and DumPDF.
DumPDF's answer:
DumPDF ("Don't Upload My PDF") runs 100% client-side inside the user's web browser with zero remote server file uploads:
DumPDF's answer:
Traditional online PDF tools upload confidential files to external servers, creating third-party exposure risks and queue bottlenecks:
DumPDF's answer:
DumPDF is designed for users handling sensitive files under strict privacy standards:
DumPDF's answer:
DumPDF was created by developers and privacy advocates frustrated by the lack of secure tools for basic document tasks:
DumPDF's answer:
DumPDF leverages high-performance, in-browser execution technologies:
DumPDF's answer:
Share your experience with using one sec and DumPDF. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I think most users need more screen blocking control than they get out of the box on iOS. Ntools like one sec [1] have been invaluable for me. [1]: https://one-sec.app/. - Source: Hacker News / 9 months ago
One thing that finally worked for me was using: https://one-sec.app/ It basically forces you to do a little breathing exercise before you can visit the site that you have on its block list. It has been life changing. It adds enough... - Source: Hacker News / over 1 year ago
I've tried various forms of this. As long as there's a logged in session somewhere, I have to have various tricks and extensions on my browser to manage things. Most have been only varying degrees of successful, often ending up in me... - Source: Hacker News / almost 2 years ago
Tracking DumPDF since Oct 2026.
When comparing one sec and DumPDF, you can also consider the following products.

Real Focus in Real-Time. Measure and improve your focus day by day, on iPhone, iPad and macOS.
Compare Opal.so to one sec or DumPDF:

PDF24 is a free to use PDF creator, converter, and virtual printer.
Compare PDF24 to one sec or DumPDF:

Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
Compare Freedom.to to one sec or DumPDF:

PDFsam Basic, a free, open source, multi-platform software designed to split, merge, extract pages, mix and rotate PDF files
Compare PDFsam to one sec or DumPDF:

Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
Compare Cold Turkey to one sec or DumPDF:

Privacy first PDF tools, files processed locally, zero server uploads.
Compare DukPdf to one sec or DumPDF: