HexDrop — Hex Viewer & Binary File Inspector

Tracking since Apr 9, 2026.

Changelog

• May 21, 2026
  description

  HexDrop is a professional hex viewer built for developers, game modders, and security researchers. It runs entirely in your browser — no installs, no uploads, no accounts. Just drop a file and see every byte.
  
  Drop any file — executables, save games, ROMs, firmware, archives, images — and instantly see hex and ASCII side by side in a clean dual-pane view.
  
  ━━━ FEATURES ━━━
  
  NAVIGATION
  • Click any byte → status bar shows hex value, ASCII character, and decimal
  • Jump to any offset (hex or decimal input)
  • Page Up / Page Down through large files
  • Handles files up to 100 MB without freezing
  
  SEARCH
  • Search by hex pattern (e.g. "4D 5A" to find MZ headers)
  • Search by ASCII string
  • Navigate matches forward and backward (Enter / Shift+Enter)
  • KMP algorithm — fast even on large files, capped at 50,000 results
  
  SELECTION & COPY
  • Click-drag to select any byte range
  • Copy selection as hex string or ASCII text
  
  ENCODING SUPPORT
  • UTF-8 with full emoji and multi-byte character support
  • UTF-16 Little Endian and Big Endian (with surrogate pair support)
  • Windows-1252 (complete 0x80–0x9F table)
  • Plain ASCII
  
  DISPLAY OPTIONS
  • Adjustable columns: 8, 16, or 32 bytes per row
  • Export full file as a formatted hex dump
  
  PRIVACY
  • Works 100% offline — nothing ever leaves your device
  • No network calls, no telemetry, no accounts
  • No third-party dependencies
  
  ━━━ BUILT FOR ━━━
  • Game modders inspecting save files and PAK archives
  • Reverse engineers analyzing executables and firmware
  • CTF players and security researchers
  • Developers debugging binary file formats
  
  Built with pure vanilla JavaScript. No frameworks, no bloat, no servers.
  I built this while reverse engineering a 2008 UE3 game and needed something fast that worked offline. Nothing else fit — so I built it.

  HexDrop is a fast, in-browser hex viewer built for game modders, reverse engineers, security researchers, and anyone who needs to peek inside a binary file without spinning up a full hex editor.
  
  Drop any file on the tab. See hex and ASCII side by side. Click any byte to see its hex value, decimal value, and character. Search by hex, decimal, ASCII, or limit search to a selection. Jump to any offset. Switch encodings (UTF-8, UTF-16 LE/BE, Windows-1252, ASCII). Export as hex dump, hex only, decoded text, or PDF. Handles files up to 100MB.
  
  No data leaves your device. Zero network in the free version. Fully offline.
  
  ═══ HEXDROP PRO — $4.99 lifetime, built for power users ═══
  
  Optional one-time upgrade unlocks the toolkit modders and reverse engineers actually use:
  
  • PATTERN WILDCARDS — search "4D 5A ?? ?? 50 45" style. AOB-scan binaries, find PE headers, locate game memory patterns. The "??" matches any byte.
  
  • HASH CALCULATOR — SHA-256, SHA-1, and CRC32 of the full file or any selection. One click to copy. Verify patches, check file integrity.
  
  • VALUE DECODER — select bytes, see them decoded as int8/16/32/64 (signed and unsigned), float32/64, in both little-endian and big-endian. Identifies HP, gold, position values, etc. instantly.
  
  • STRUCTURE TEMPLATES — define a struct (u32 width, char[8] magic, etc.) and apply at any offset to see every field decoded. Built-in presets for PNG, BMP, ZIP, WAV, PE/EXE headers. Map any binary format yourself.
  
  • DIFF MODE — load two files side-by-side, every differing byte highlighted in red. Jump to next/previous individual difference. Switch to "Changes Only" view for cheat-engine-style change list with int/float interpretations. Export the diff as a binary patch file.
  
  • ANNOTATED REGIONS — highlight any byte range with a color and label. Annotations save per-file (keyed by file hash, never file content) so they come back next time you open it. Map out file formats as you reverse-engineer them.
  
  • BOOKMARKS — save offsets in any file with notes. Returns when you reopen the same file.
  
  • 5 THEMES + CUSTOM THEME BUILDER — Matrix Green, Cyberpunk Pink, Ocean Blue, Sunset Orange, plus a custom theme builder where you pick your own background, accent, and text colors and HexDrop derives the full palette.
  
  One-time payment, lifetime access. No subscription, no auto-renewal, no telemetry. Powered by ExtensionPay (Stripe-backed).
  
  ═══ PRIVACY ═══
  
  The free version makes zero network connections. The Pro version's only network call is to extensionpay.com to verify your Pro license — no file data is ever transmitted. All hash computation, diff comparison, pattern search, value decoding, structure parsing, and annotation storage runs locally in your browser tab.
  
  Full privacy policy: https://ghostrevenge36.github.io/hexdrop-privacy/
  
  ═══ ABOUT ═══
  
  Built by GhostRevenge36. Open source on GitHub: https://github.com/GhostRevenge36/HexDrop
  
  If something HexDrop made helped you, that's the win. Tip jar's optional: https://ko-fi.com/ghostrevenge36

• May 21, 2026
  short_description

  Drop any file. Instantly view it as hex, ASCII, and decoded text. Built for developers, modders, and reverse engineers.

  Drop any file. View it as hex, ASCII, and decoded text. Free for everyone, with optional Pro tier for themes and bookmarks.

• May 21, 2026
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