PDF metadata & hidden-data viewer
Drop a PDF to reveal every hidden, privacy-relevant thing inside it — author, software, attachments and more. Read-only, and the file never leaves your browser.
Drag & drop your file here
Drop a PDF to scan it for hidden data — nothing is uploaded
Uploads of your file
0
Bytes of your file sent
0 B
Verified — your file never left this device.
Process a file and watch these stay at zero.
How to check what's in a PDF
- 1
Open your PDF
Drop in the file. It's read locally in your browser and never uploaded.
- 2
Read the report
See exactly what's hidden inside — author and software fingerprint, attachments, JavaScript, comments, layers and leftover data from earlier edits.
- 3
Scrub anything sensitive
Found something you don't want to share? One click takes you to the metadata remover to strip it out — also fully in your browser.
PDFs carry more than the page you see
Every PDF can quietly store data that has nothing to do with the visible page: the author's real name, the exact software that created it, creation and modification timestamps, file attachments, document-level JavaScript, review comments, hidden layers, and even leftover content from earlier edits. Before you send a file to a client, an employer, a court or the public, it's worth knowing what's actually in it. This viewer reads all of that in your browser and shows you the real values — no account, no upload, nothing sent to a server.
A privacy checker that respects your privacy
Most online metadata checkers ask you to upload the very file you're worried about — which defeats the purpose. pdfnoupload analyzes the document locally with pdf-lib and PDF.js, so a confidential PDF stays on your device the entire time. We deliberately keep the findings honest: we report metadata, an authoring-software fingerprint, attachments, JavaScript, annotations, optional-content layers and leftover revision data — the things PDFs genuinely contain. When you spot something sensitive, the metadata remover scrubs it, again without ever uploading the file.
Frequently asked questions
Is my PDF uploaded to check it?+
No. The entire scan runs in your browser — the file never leaves your device. You can confirm there are no uploads in DevTools → Network.
What hidden data can it find?+
Document metadata (title, author, subject, keywords, dates), the creator/producer software fingerprint, XMP metadata, embedded file attachments, document-level JavaScript, review comments and markup annotations, optional-content layers, and leftover data from earlier edits (incremental updates).
Does it change or save my PDF?+
No. This is a read-only viewer — it only reports what's inside. To actually remove the data, use the linked metadata remover, which also works entirely in your browser.
What does "leftover data from earlier edits" mean?+
PDFs can be saved as incremental updates, which append changes without discarding the old content. When that happens, earlier versions of the document may still be recoverable inside the file. We detect this by counting end-of-file markers and flag it so you can re-save a clean copy.