10 tools
Developer Tools
Look inside the file, not just at the page.
When a PDF misbehaves, the rendered page tells you nothing about why. The answer is in the structure: which PDF version, how objects are laid out, which fonts are embedded versus merely referenced, what is actually consuming the bytes, whether the page box and crop box disagree. These tools expose that layer for people who need to debug documents rather than just read them — and they are deliberately among the most detailed on the site.
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Most used in developer tools
Every other tool in this group
PDF Structure Inspector
See how the document is wired together, from trailer to page tree.
PDF Object Inspector
Enumerate the objects a PDF is built from and how their streams are encoded.
PDF Version Checker
Check which PDF version a file claims, and what that version can and cannot do.
PDF Font Inspector
Find out which fonts travel with your PDF and which depend on the reader having them.
PDF Image Inspector
See the real resolution of every image in a PDF, and the DPI it actually prints at.
PDF Page Size Detector
Measure every page box in a PDF and catch the mixed sizes that ruin a print run.
PDF Size Analyzer
A byte-level breakdown of where your PDF weight actually is.
PDF/A Checker
Check the archival indicators in a PDF — clearly labelled as indicators, not certification.
PDF Color Space Inspector
Check whether a PDF is press-ready colour, or still sitting in screen RGB.
About developer tools
Who are these tools for?
Developers generating PDFs programmatically, prepress and print operators, accessibility auditors, and anyone diagnosing a file that renders differently across viewers.
Can I see the raw object tree?
No raw object-tree browser is provided. The inspectors read the document structure and report selected facts such as indirect-object counts, cross-reference style, stream filters and page geometry. The size and object views add byte-attribution summaries. Each JSON report exports selected findings rather than every object and reference.