PDFConverterOnline.com

Free · runs in your browser · nothing is uploaded · works offline

Inspect a PDF Online — Preflight Report on Fonts, Images, Accessibility and Safety, No Upload

Eighteen checks in one page, run on your device — nothing uploaded, nothing changed.

Eighteen checks in one page, run on your device — nothing uploaded, nothing changed.

      Private by design: processing happens on your device with open-source libraries served from this site (licences). Nothing is uploaded, and once loaded the tool keeps working offline. Need other tools? All tools are on the homepage.

      Free, no ads, no upsell. If it saved you a trip to a paid converter, you can buy the developer a coffee — it funds new tools and keeps this one free. ☕ Buy me a coffee

      Runs on your deviceTested on Pixel 7 & MacBook Air M2Open-source engines · licences

      About this tool

      A quick preflight answers the questions a print shop, a records office or a cautious recipient will ask: are all fonts embedded, are the images sharp enough, is the file tagged and does it declare a language for screen readers, is there a text layer or is it a scan, does it contain JavaScript or launch actions, are there attachments, is it encrypted, which software made it and when, and does it carry earlier versions that could be recovered. Each check is marked OK, warning or problem, with a one-line explanation and the tool to fix it.

      You get the report as an HTML page you can keep or forward, plus a plain-text copy. The PDF itself is not modified.

      How it works

      1. Step 1. Choose or drop the PDF(s).
      2. Step 2. Press Inspect PDF.
      3. Step 3. Open the report; warnings link the fix to the right tool (Compress, OCR, Edit metadata, Repair…).

      Questions

      What does "not embedded" mean for a font?

      The PDF refers to a font by name and expects the viewer to have it. Standard fonts (Helvetica, Times, Courier) are safe; others may be substituted and change the layout — ask for the file with fonts embedded.

      Is the DPI figure exact?

      It is an upper bound: the image's pixel width divided by the page width. An image drawn smaller than the page has a higher effective resolution.

      Does it validate PDF/A?

      No. It reports whether the file claims PDF/A conformance; full validation needs veraPDF.

      Good to know

      • PDF/A conformance is reported, not validated.
      • Text-layer check samples the first five pages.

      Updated · Part of PDFConverterOnline.com, the independent guide to every PDF converter online.