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AI-Powered Analysis

File Analyzer

Advanced file analysis with content-based detection. Upload multiple files for batch analysis, extract comprehensive metadata, security insights, and technical details regardless of file extension.

Upload Files for Analysis

Select multiple files to extract comprehensive information, metadata, and technical details for batch analysis

Choose Files

Content-Based Detection

Advanced AI-powered analysis detects file types based on actual content, not just file extensions.

Batch Analysis

Upload and analyze multiple files simultaneously with comprehensive security scanning and risk assessment.

Detailed Metadata

Extract comprehensive metadata from images, PDFs, executables, and various file formats.

Overview

File Analyzer — Metadata, Type Detection & Security Scan

The File Analyzer on sourcecodestack reads the files you select entirely within your browser — no file data is sent to any server at any point. It inspects the raw binary header of each file to detect the true MIME type regardless of the filename extension, computes a SHA-256 hash using the Web Crypto API, and flags any mismatch between the declared extension and the actual content.

The tool supports batch analysis: select multiple files at once and each is analysed sequentially. For images it extracts pixel dimensions and colour space. For text files it counts lines, words, and characters and attempts to identify the programming language. PDF files report page count, version, and whether encryption is present. Every file receives a security assessment that includes entropy measurement, executable detection, archive detection, and a summary risk level.

100% freeNo sign-upRuns in your browserFiles never uploaded

How to use it

1Click Choose Files and select one or more files from your device.
2The tool immediately begins analysing each file — a spinner shows progress.
3Review the Basic Information panel for file name, size, detected MIME type, and extension.
4Check the Technical Details panel for the SHA-256 hash and raw file signature bytes.
5Read the Security Analysis panel for risk level, entropy score, and any suspicious patterns flagged.

Key features

Content-based MIME type detection using file signature bytes, independent of the file extension

SHA-256 hash calculation via the browser Web Crypto API — no third-party hashing service

Extension mismatch warning when the declared extension does not match the detected content type

Image metadata: pixel dimensions and colour space (RGB or RGBA transparency detection)

Text file analysis: line count, word count, character count, encoding, and language hinting

PDF analysis: page count, PDF version string, and encryption status

Security scan: executable detection, archive detection, entropy score, embedded-file detection, and a low/medium/high risk rating

Frequently asked questions

Do my files get uploaded anywhere?

No. The File Analyzer uses browser APIs — FileReader, ArrayBuffer, and Web Crypto — to read and process your files entirely in the browser tab. No file data is transmitted to any server.

What does the entropy score mean?

Entropy measures the randomness of the byte distribution in the file on a scale of 0 to 8. Plain text files score low (around 4-5). Compressed or encrypted files score high (above 7.5), which the tool flags as a potential indicator of obfuscation.

Why does the tool sometimes flag a mismatch between extension and type?

The extension is what the filename says the file is; the detected type comes from reading the first bytes of the file content. If they differ — for example, a .jpg that is actually a PNG — the tool shows an Extension Mismatch warning.

Can it analyse executables and archive files?

The tool identifies executable binaries (.exe, ELF, Mach-O) and archives (ZIP, RAR, 7z) by their byte signatures and marks them accordingly in the security section. It does not open or execute any files.

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Full Guide Available

File Analyzer Complete Guide

Learn how to inspect file metadata, MIME types, EXIF data, and binary content in your browser.

What's inside

Read file metadata & format

Detect type, encoding & size

Common questions answered

Read Full Guide