About This Free Hex Dump Tool

This ultra‑fast online Hex Dump Tool lets you inspect the binary makeup of any file or text instantly in your browser—no upload, no server wait, no privacy risk. It streams large files in chunks, formats bytes into clean hexadecimal columns, and optionally shows their printable ASCII representation. Whether you are a developer hunting for magic numbers, a modder scanning save data, a digital forensics learner, a CTF participant, or simply curious about what hides inside a document, this tool is crafted to feel snappy, accurate, and minimal. It works seamlessly on mobile, tablet, and desktop with a fully responsive layout and accessible controls. You can load local files, paste text, or fetch a URL (when CORS allows) and search instantly. Everything runs locally using modern browser APIs and a Web Worker for smooth scrolling even with large binary files.

How to Use

1. Select or drop a file, paste raw text, or enter a direct URL.
2. Adjust bytes per line, casing, offset start, and toggles (ASCII, grouping, auto scroll).
3. Click Generate Hex (or let live update render while you type).
4. Use the search box to highlight hex bytes (e.g. FF D8 FF) or plain text (e.g. PNG).
5. Copy or Export once processing finishes. Results never leave your device.

Pro Tips & Best Practices

• Offsets: Provide a starting offset (hex like 0x800 or decimal) to align with embedded segments.
• Search smart: Enter spaced hex (e.g. 50 4B 03 04) or plain text. The tool auto-detects format.
• Large files: Processing is chunked; you can watch output stream. Disable auto scroll to examine earlier lines.
• Grouping: Enable word grouping to visually pair bytes for 16‑bit values.
• ASCII dots: Non‑printable bytes appear as a dot for clarity.
• URL mode: Add ?url=... to the page address to auto fetch and dump.
• Privacy: All work is local. Network is used only when you explicitly fetch a URL.

Performance scales with your browser: multi‑MB binaries parse in fractions of a second. The tool uses chunked processing and Web Workers to maintain responsiveness. Perfect for reverse engineering, file format analysis, debugging binary protocols, or educational purposes. Enjoy exploring the raw data beneath your files!