File Metadata Viewer: Magic Bytes, Dimensions and JPEG EXIF
Inspect a local file's size, declared MIME, magic bytes, first 64 bytes, supported raster dimensions and bounded JPEG EXIF with hidden-by-default GPS.
Enabling local controls…
Local media settings
Maximum 20 MiB. Files are read, never executed or used to load resources; unknown formats retain header inspection. MIME is a hint, magic is not a safety verdict. Dimensions come from container preflight, not complete pixel decoding. JPEG EXIF is a bounded subset. GPS is sensitive location data, hidden/excluded by default; no map requests.
Inputs stay in page memory without uploads, storage or URL insertion. Editing/cancelling revokes old exports.
Source date: 2026-10-17 · CIPA: Exif standards
Preview and export
Enter input, choose a file or load a sample, then generate.
How to use this tool
Select/drop a file or load a synthetic sample. Review header evidence and warnings. Reveal sensitive GPS only deliberately; clear removes this page's report.
When not to use it
MIME and magic are clues, not a safety verdict. Unknown files remain inspectable. EXIF parsing is a bounded subset; no file code/resources are executed and no upload or map request occurs.
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