Binary File Inspector
Drop in a file and see what is actually inside it. The inspector decodes PNG chunks, JPEG segments, GIF frames, ICO entries, ZIP records, WebP chunks, PDF features and MP4 boxes, and shows the first bytes in a hex view.
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Questions about binary file inspector
Which formats can it read?
PNG, JPEG, GIF, ICO, WebP, ZIP, PDF, MP4 and the WOFF, WOFF2, TrueType and OpenType headers. Anything else is shown as an unknown binary file with a hex view, so you can still look at the first bytes.
Is the file uploaded?
Never. It is read with the browser's file API and decoded in the page. That also means a confidential document, a customer asset or an unreleased build can be inspected without it travelling anywhere.
How is the PDF part read?
The PDF check is a fast scan of the file for the markers that matter, such as an encryption dictionary, embedded files, JavaScript actions or a missing end-of-file marker. It is not a full document parser, and the tool says so in its findings.
What is the hash for?
The SHA-256 digest identifies the exact file. It is the same value that a build pipeline, a virus scanner or an upload form would compute, so you can compare the file you are holding with the one recorded elsewhere.
Why does a PNG report so many chunks?
A PNG is a sequence of chunks, and a typical file holds a header, colour information, one or more blocks of image data, and often extra metadata such as text or an embedded thumbnail. The inspector lists each one with its size so you can see where the weight sits.
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