Why Inspect Files in Your Browser?
Before uploading images, documents, or media to social networks, client portals, or public repositories, inspecting what hidden metadata they contain is an essential privacy practice.
Smartphones and digital cameras embed sensitive EXIF tags inside photos, including your exact GPS coordinates, device serial number, camera model, and timestamp. FreeFileTool's File Inspector reads binary headers locally in your browser memory so you can audit files without exposing your location or contents to any cloud server.
Understanding Cryptographic Hashes (SHA-256 & MD5)
A cryptographic hash is a fixed-length mathematical fingerprint computed from the binary bits of a file. If even a single byte or pixel changes, the hash will change completely. You can use SHA-256 hashes to verify file integrity, ensure downloads haven't been corrupted, or confirm files match their original release checksums.
Frequently Asked Questions
Are my files or hashes sent to any server?
No. The entire analysis — including byte inspection, EXIF parsing, and SHA-256 hashing — is performed in your browser using the HTML5 Web Crypto API. No data is sent over the internet.
What file formats does the File Inspector support?
You can inspect any file format (JPG, PNG, WebP, AVIF, PDF, MP3, MP4, ZIP, JSON, EXE, and more). Hashes and binary size are calculated for all files, while dimensions and durations are computed for supported media.