BitShell - Binary, Hex & Base64 Converter

Tracking since Apr 1, 2026.

Changelog

• May 12, 2026
  description

  BitShell is a fast, fully offline conversion tool for developers,
  security researchers, students, and system administrators who work with
  encodings and number systems daily. No websites. No tracking. No data
  ever leaves your machine.
  
  Key Features
  
  Universal Conversion
  - Binary (0b)
  - Hexadecimal (0x)
  - Decimal (ints and floats)
  - UTF-8 text
  - Base64 encode/decode
  - IPv4 and IPv6 support
  - IPv4 subnet / CIDR calculator
  
  Smart Detection
  - Auto-detects IPv4 and IPv6 addresses
  - Auto-detects CIDR notation (e.g. 14.12.72.8/24) and switches to subnet mode
  - Real-time validation
  - Helpful error suggestions
  - Character and byte counters
  
  Blazing Fast and Private
  - Instant conversions as you type
  - Handles up to 100,000 characters
  - No server calls — 100% offline
  - No tracking, analytics, or data collection
  
  Copy and History Tools
  - One-click copy for any format
  - Copy all formats at once
  - Visual copy confirmation
  - History of your last 50 conversions, including subnet calculations
  
  Customizable Settings
  - Adjustable font size
  - Binary grouping (4/8/16 bits)
  - Hex grouping (1–4 bytes)
  - Prefix toggles (0b, 0x)
  - Upper/lowercase hex
  - Leading-zero control
  
  Keyboard Shortcuts
  - Ctrl/Cmd + K — Clear input
  - Ctrl/Cmd + Enter — Copy all
  - Ctrl/Cmd + H — Toggle history
  - Ctrl/Cmd + , — Settings
  - Escape — Close sidebars
  
  Terminal-Inspired UI
  - Clean, distraction-free layout
  - Solarized dark theme
  - Smooth transitions and professional monospace fonts
  
  Perfect For
  - Developers
  - Security researchers
  - Students learning binary, hex, and networking
  - Sysadmins and network engineers
  - Reverse engineers and protocol analysts
  
  Common Use Cases
  - Calculate subnet ranges, host counts, and network addresses from CIDR notation
  - Convert IP addresses between formats
  - Decode Base64 strings
  - Convert hex color codes
  - Analyze packet capture data
  - Switch between number bases for coding
  - Encode/decode text for web development
  
  Recent Updates (v1.0.6)
  - New: IPv4 subnet / CIDR calculator — type any CIDR address (e.g. 200.107.16.17/18) to instantly see IP in binary, subnet mask, network address, broadcast address, first/last host, address count, and max hosts
  - CIDR is auto-detected as you type — no extra tab or button needed
  - CIDR results fully supported in copy, copy all, and history
  - Fixed hex prefix display for multi-byte binary and decimal inputs
  - Fixed leading zeros on space-separated decimal-to-binary conversion
  - Improved bit and byte counter accuracy for decimal and fractional binary inputs
  - Fixed decimal float text conversion to show clear error instead of silent output
  - Code cleanup and performance improvements
  - Added a pop-out button for a resizable window
  
  Technical Details
  - Works fully offline
  - Uses Chrome Storage API
  - Context-menu integration
  - Supports arbitrarily large integers via BigInt
  - UTF-8 text support
  - Robust error handling
  
  Why BitShell?
  Most online converters require internet access and track your data. BitShell is different:
  - Offline anywhere
  - Zero data collection
  - Instant performance
  - Professional-grade tools
  - Clean, focused interface
  
  Support and Feedback
  Found a bug or want a new feature? Reach out through the support link. BitShell improves with your feedback.
  
  Privacy
  BitShell does not collect personal data, track usage, send data to servers, or use analytics.
  All settings and history stay on your device only.

  BitShell is a fast, fully offline conversion tool for developers,
  security researchers, students, and system administrators who work with
  encodings and number systems daily. No websites. No tracking. No data
  ever leaves your machine.
  
  Key Features
  
  Universal Conversion
  - Binary (0b)
  - Hexadecimal (0x)
  - Decimal (ints and floats)
  - UTF-8 text
  - Base64 encode/decode
  - IPv4 and IPv6 support
  - IPv4 subnet / CIDR calculator
  
  Smart Detection
  - Auto-detects IPv4 and IPv6 addresses and switches to IP mode
  - Auto-detects CIDR notation (e.g. 14.12.72.8/24) and switches to subnet mode
  - Real-time validation with helpful error messages and format suggestions
  - Character and byte counters
  
  Blazing Fast and Private
  - Instant conversions as you type
  - Handles up to 100,000 characters
  - No server calls — 100% offline
  - No tracking, analytics, or data collection
  Copy and History Tools
  - One-click copy for any format
  - Copy all formats at once
  - Visual copy confirmation
  - History of your last 50 conversions, including subnet calculations
  
  Customizable Settings
  - Adjustable font size
  - Binary grouping (4/8/16 bits)
  - Hex grouping (1–4 bytes)
  - Prefix toggles (0b, 0x)
  - Upper/lowercase hex
  - Leading-zero control
  
  Keyboard Shortcuts
  - Ctrl/Cmd + K — Clear input
  - Ctrl/Cmd + Enter — Copy all
  - Ctrl/Cmd + H — Toggle history
  - Ctrl/Cmd + , — Settings
  - Escape — Close sidebars
  Terminal-Inspired UI
  - Clean, distraction-free layout
  - Solarized dark theme
  - Smooth transitions and professional monospace fonts
  
  Perfect For
  - Developers
  - Security researchers
  - Students learning binary, hex, and networking
  - Sysadmins and network engineers
  - Reverse engineers and protocol analysts
  
  Common Use Cases
  - Calculate subnet ranges, host counts, and network addresses from CIDR notation
  - Convert IP addresses between binary, hex, and decimal formats
  - Decode Base64 strings
  - Convert hex color codes
  - Analyze packet capture data
  - Switch between number bases for coding
  - Encode/decode text for web development
  
  Recent Updates (v1.0.7)
  - New: Dedicated IP tab for IPv4, IPv6, and CIDR — select IP mode directly or let auto-detection switch to it as you type
  - Auto-detection now switches to the IP tab when an IPv4, IPv6, or CIDR address is entered from any other tab
  - Invalid IP input shows a clear error with format suggestions, matching the behavior of all other input types
  - CIDR auto-detection now also activates the IP tab correctly
  - Version bump and description update to reflect IP conversion support
  
  Previous Updates (v1.0.6)
  - New: IPv4 subnet / CIDR calculator — type any CIDR address (e.g. 200.107.16.17/18) to instantly see IP in binary, subnet mask, network address, broadcast address, first/last host, address count, and max hosts
  - CIDR is auto-detected as you type — no extra tab or button needed
  - CIDR results fully supported in copy, copy all, and history
  - Fixed hex prefix display for multi-byte binary and decimal inputs
  - Fixed leading zeros on space-separated decimal-to-binary conversion
  - Improved bit and byte counter accuracy for decimal and fractional binary inputs
  - Fixed decimal float text conversion to show clear error instead of silent output
  - Code cleanup and performance improvements
  - Added a pop-out button for a resizable window
  
  Technical Details
  - Works fully offline
  - Uses Chrome Storage API
  - Context-menu integration
  - Supports arbitrarily large integers via BigInt
  - UTF-8 text support
  - Robust error handling
  
  Why BitShell?
  Most online converters require internet access and track your data. BitShell is different:
  - Offline anywhere
  - Zero data collection
  - Instant performance
  - Professional-grade tools
  - Clean, focused interface
  
  Support and Feedback
  Found a bug or want a new feature? Reach out through the support link. BitShell improves with your feedback.
  
  Privacy
  BitShell does not collect personal data, track usage, send data to servers, or use analytics.
  All settings and history stay on your device only.

• May 12, 2026
  short_description

  Fast binary, hex, decimal, text & Base64 converter with smart format detection, history, and one-click copy.

  Binary, hex, decimal, text, Base64 & IP converter with IPv4/IPv6/CIDR support, smart format detection, history, and one-click copy.

Permissions & access

Permissions

contextMenusstorageclipboardWrite

Host access

None declared

Screenshots

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