PDF tools / Stirling PDF
Stirling PDF
A free, private PDF editor you can run on any infrastructure.
Where it stands
3.8 / 5
Signals score
Not a hands-on test
Based on 1 of 3 signals
- Website health4.2 / 5 · weight 50%
Measured from the tool's public website
Built only from what we can measure or quote without using the tool. How ranking works
Rank by signals
We have not run our own hands-on test on Stirling PDF yet. Facts checked 2026-11-04. How tests work
Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.
Should you use Stirling PDF?
A quick read built only from what the tool's own pages state and from our tests, not from opinion. Facts checked 2026-11-04.
A good fit if…
- Your files must stay on your own device. Its own pages say they do.
- You want a free option. It states: “Stirling PDF is free for individual use. The page says: “30M+ downloads, free for individual use.””
Check first
- Its pages do not state: pricing, signup, watermark. Check on the tool's site before you rely on it.
Measured signals
4.2 / 5 · measured 2026-11-08Read automatically from Stirling PDF's public website: how reliable, secure, private and open the site is. This is not a test of how well the tool does its job. How this is measured
- Reliability5 / 5The page answered and finished downloading in 183 ms.
- Security3.5 / 52 of 5 protective headers set (strict-transport-security, x-content-type-options).
- Privacy5 / 5No third-party tracking services found on the page.
- Transparency3 / 5No privacy policy linked; links a pricing page.
Community feedback
We found no public discussion of this tool to read.
A score needs at least 12 different commenters across 2 threads.
Not tested yet
We checked, and the owner has not allowed automatic testing. We only test a site automatically when its owner says yes. If you make Stirling PDF, publish a text file at /.well-known/agathox-test.txt on your site containing the word allow, and within a day it is tested and scored, with the results published as they are. More for makers
- Free tier
- Stirling PDF is free for individual use. The page says: “30M+ downloads, free for individual use.”
- Paid plan
- Not stated.
- Signup
- Not stated.
- Watermark
- Not stated.
- Where files go
- Stirling PDF runs on the user's own machine or servers. The page says: “Your PDFs. Your servers.. . Stirling is a private PDF editor that runs anywhere and automates everything.”
From the tool's own pages, checked 2026-11-04. Sources: Home. Prices and limits change; check the tool before you rely on them.
Read automatically by a program, not by a person. Each fact quotes the sentence it came from, and a fact is shown only if that sentence is on the page. Where a page did not say, it reads “Not stated.”
Get an email if Stirling PDF changes
We check its official pages every week. If they change, we tell you, so you can see if the price or limits moved. No other email, and one click stops it.
Are you the maker of Stirling PDF? Link to this page
Copy this into your site. The link goes to this page, and it does not change any score.
<a href="https://agathox.com/tools/stirling-pdf">Stirling PDF on agathox: compared and tested</a>
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