Built for PDF developers and security researchers, our Hex Viewer allows you to look 'under the hood' of a PDF document. By mapping the ArrayBuffer of your file to a formatted grid, you can inspect the PDF magic number, version headers, and internal object streams. This tool is essential for identifying file corruption, hidden metadata, or structural anomalies without installing a desktop hex viewer.
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Advanced PDF Hex Inspector
Inspect raw binary data, headers, and indirect objects of any PDF file. Secure, browser-only hex editor for developers and researchers.
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About Advanced PDF Hex Inspector
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Your files and data never leave your browser — processed directly on your device.
Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1
Select PDF
Select the document you wish to inspect locally.
2
Generate Dump
Our engine creates a virtual hex dump in milliseconds.
3
Audit Code
Scroll through the hexadecimal and ASCII streams to find specific object data.
Key Features
Formatted Byte Grid
View 16-byte offsets with corresponding ASCII decoding side-by-side.
Header Inspection
Instantly find the %PDF- header to verify file integrity.
Sandbox Security
Perform forensic analysis on untrusted files safely within your browser's restricted memory.
Frequently Asked Questions
This version is a Viewer only to ensure document integrity. Use our 'Fix Corrupt Header' tool if you need to modify the binary stream.
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Safely overwrite the PDF version specification header (e.g. down to 1.3 or 1.4).
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Extract raw text streams with precise X,Y coordinates and dimensions as a JSON.
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