PDFFF
Free PDF tools that run in your browser. Documents are never uploaded to a server.

Contact & Support

Last updated: 2 October 2026

pdff.online is run by one person, and everything that arrives is read. If something here is wrong or does not work, that is genuinely useful to hear about.

Where to send what

If your message is aboutSend it toSubject line
A tool that fails or gives a wrong result accts.pak@gmail.comPDFF bug report
Something inaccurate on the site accts.pak@gmail.comPDFF correction
Privacy, access, erasure or objection accts.pak@gmail.comData request
A security vulnerability accts.pak@gmail.comSECURITY - see below
Advertising or sponsorship Advertising pagePDFF advertising
Licensing, embedding or white-label Licensing pagePDFF licensing
A review you believe is not genuine Reviews pagePDFF review concern

What makes a bug report useful

Four things, and it can be fixed much faster with them:

  1. Which tool. The page you were on.
  2. Which browser and version. Chrome, Firefox, Safari or Edge, and roughly its version.
  3. What you did and what happened instead. The actual behaviour is more useful than a description of the problem.
  4. The structure of the file, if a specific PDF fails. Whether it has AcroForm fields or is XFA, and whether it is a scan or has selectable text. Form fields from banks and tax authorities are usually XFA, and that single distinction explains the majority of reported form-filling failures.

Before you write

Most reported problems fall into one of the limitations already documented in Terms of Use, section 5:

If your issue is one of these, the answer is already there and you have not lost anything by checking.

Security disclosures

If you find a vulnerability, email accts.pak@gmail.com with "SECURITY" in the subject line. Please include a description, the affected URL, and steps to reproduce.

Please allow reasonable time for a fix before disclosing publicly. A working exploit should not be posted while a fix is still in progress. There is no bug bounty, and the Operator will not offer payment, but genuine reports are read directly and acknowledged.

Please do not access other users' documents, run automated scans against the infrastructure, or test in ways that degrade the Service for others. Authorised research on the Service itself, rather than its users' files, is welcome.

Response time

Bug reports are usually answered within a few working days. Data requests are acknowledged within seven days and actioned within one month, as set out in the privacy policy.

Round-the-clock support is not offered, and pretending otherwise would be another claim this site does not make.

Corrections

If the site states something that is not true, that is a defect and a priority. Corrections are made publicly visible rather than applied quietly, and the about page maintains a record of claims that were removed and why.

No analytics on this page

This page ships without a tracking script. Aggregate analytics are collected only on the tool pages, and only if you accept them in the cookie banner. Your documents are processed locally and are never transmitted. See the privacy policy.