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.
Select multiple files to extract comprehensive information, metadata, and technical details for batch analysis
Advanced AI-powered analysis detects file types based on actual content, not just file extensions.
Upload and analyze multiple files simultaneously with comprehensive security scanning and risk assessment.
Extract comprehensive metadata from images, PDFs, executables, and various file formats.
File Analyzer is a browser-based tool that inspects any file you upload and extracts detailed metadata, technical properties, and security insights without sending your data to a server. It reads file signatures to identify the true file type regardless of extension, computes SHA-256 cryptographic hashes for integrity verification, and surfaces information such as image dimensions, PDF page counts, text encoding, and EXIF data. Whether you need to verify a download, audit an unknown attachment, or simply learn more about a file before opening it, File Analyzer gives you a comprehensive report in seconds.
No. All processing happens locally in your browser. The file never leaves your device, so your data stays completely private.
File Analyzer works with virtually any file type. It provides enhanced metadata for images, PDFs, and text-based files, while every file receives basic information, hash verification, and security analysis regardless of format.
A SHA-256 hash is a unique fingerprint for the exact contents of a file. If even a single byte changes, the hash will be completely different. You can compare the hash shown here with one provided by a trusted source to confirm the file has not been altered or corrupted.
The tool checks for executable content, double file extensions, unusually high entropy, embedded files, and other suspicious indicators. It combines these signals into a low, medium, or high risk rating to help you decide whether a file is safe to open.
Yes. Select multiple files in the file picker and the analyzer will process them in a batch, showing individual results for each file so you can compare metadata and security findings side by side.
Every file you create, edit, or receive carries more information than its visible contents. This hidden layer of information — known as metadata — is data about data. It describes the file itself rather than what is inside it. Metadata can include the file's name, size, type, creation date, last modified timestamp, and the software used to create it. For images, metadata can extend far further: the camera model and settings used to take a photo, GPS coordinates of where the photo was taken, the photographer's name, copyright information, and even a thumbnail of the original image before any edits were made. This rich layer of context is useful for many legitimate purposes — but it can also reveal information you never intended to share.
The privacy implications of file metadata are significant and frequently overlooked. A Word document shared with a client might contain the author's full name, the organization name, revision history, and comments that were not meant to be visible. A photograph posted online might embed the precise GPS coordinates of your home if location services were enabled on your phone when the photo was taken. Journalists, activists, whistleblowers, and anyone sharing sensitive information must understand and manage metadata before distributing files, as it has been the source of real-world privacy breaches and security failures.
A browser-based file analyzer reads and displays this metadata in a clean, structured format without uploading your file to any server. The entire analysis happens locally in your browser, meaning your file's contents never leave your device. Whether you are checking what information a file exposes before sending it, verifying a file's authenticity and origin, or simply satisfying curiosity about what data is embedded in a digital asset, this tool gives you immediate, detailed insight into the full metadata profile of any file.
MIME (Multipurpose Internet Mail Extensions) type is a standardized label that identifies the nature and format of a file. It consists of a type and a subtype separated by a slash, such as image/jpeg, application/pdf, text/html, or video/mp4. Originally developed for email attachments, MIME types are now used everywhere on the web: browsers use them to decide how to render a response, web servers send them in HTTP headers, and file upload systems use them to validate that uploaded files match the expected format. A file's MIME type may differ from its extension — a file named document.pdf could actually contain HTML, and the MIME type detected from its binary content will reveal the truth.
Removing metadata — a process called metadata stripping or sanitization — varies by file type. For images, tools like ExifTool (command-line), ImageOptim (Mac), or the "Remove personal information" option in Windows file properties can strip EXIF and other embedded data. For Word documents, use File > Check for Issues > Inspect Document in Microsoft Office, which removes author information, comments, revision history, and hidden data. For PDFs, Adobe Acrobat's Sanitize Document feature or open-source tools like mat2 can clean metadata thoroughly. Simply exporting or re-saving a file does not always remove all metadata — use a purpose-built stripping tool for reliable results.
Magic bytes are the first few bytes of a file's binary content that uniquely identify its format, regardless of the file's extension or claimed MIME type. For example, JPEG files always begin with the bytes FF D8 FF, PDF files begin with 25 50 44 46 (which is %PDF in ASCII), and PNG files begin with 89 50 4E 47. This allows software to detect a file's true type by reading its content rather than trusting its name. Security-conscious file upload systems always validate magic bytes to prevent attacks where a malicious file is renamed to appear as a harmless image or document. This analyzer reads and displays the magic bytes of any file you inspect, alongside the detected format they correspond to.
EXIF (Exchangeable Image File Format) is a standard for embedding metadata directly within image and audio files, particularly those captured by cameras and smartphones. EXIF data can include the camera make and model, lens information, focal length, aperture, shutter speed, ISO sensitivity, white balance, flash status, the date and time the photo was taken (using the device's clock), and — if location services were enabled — the precise GPS latitude, longitude, and even altitude where the photo was captured. This means an unstripped photo posted online can reveal exactly where and when you took it, which has significant privacy implications for photos taken at private locations like your home.
Yes — in most cases, anyone who receives or downloads a file can access its embedded metadata using freely available tools. When you upload a photo to a website, some platforms (like Twitter and Facebook) automatically strip EXIF data as part of their image processing pipeline, while others (like Flickr and some file hosting services) preserve it entirely. When you email a document, the recipient can open its properties and see author name, company, creation date, and revision history. If you share files via cloud storage links, the metadata travels with the file. Always inspect and clean metadata from any file before sharing it publicly or with parties who should not have access to that information.
Every file you encounter — whether it is a document, image, video, executable, or data export — carries far…
Read guide →ArticleExplore our browser-based suite of developer utilities for formatting, validation, and transformation.
Read guide →BlogYou receive a .csv or .xlsx file from a colleague, a client, or a data export — but you do not have Excel…
Read guide →