A fast, lightweight CLI utility toolkit for developers and IT professionals. ut provides a comprehensive set of commonly-used tools in a single binary, eliminating the need to install and remember multiple utilities or search for random websites to perform simple tasks.

brew install ksdme/tap/ut

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/ksdme/ut/releases/latest/download/ut-installer.sh | sh

powershell -ExecutionPolicy Bypass -c "irm https://github.com/ksdme/ut/releases/latest/download/ut-installer.ps1 | iex"

cargo install --git https://github.com/ksdme/ut.git

You can also download prebuilt binaries directly from the releases page.

ut supports shell completions for bash, zsh, fish, nushell, elvish, and PowerShell. To enable tab completion:

# Generate and save completions to your fpath ut completions zsh > ~/.zsh/completions/_ut # Or add directly to .zshrc (requires reload for each ut update) echo 'eval "$(ut completions zsh)"' >> ~/.zshrc

ut completions bash > ~/.local/share/bash-completion/completions/ut # Or add to .bashrc echo 'eval "$(ut completions bash)"' >> ~/.bashrc

ut completions fish > ~/.config/fish/completions/ut.fish

ut completions nushell > ~/.config/nushell/completions/ut.nu # Or use the short alias ut completions nu > ~/.config/nushell/completions/ut.nu

ut completions powershell | Out-File -FilePath $PROFILE -Append

After setting up completions, restart your shell or source your configuration file.

├── Encoding │ ├── base64 - Base64 encode/decode │ │ ├── encode │ │ └── decode │ └── url - URL encode/decode │ ├── encode │ └── decode ├── Hashing & Security │ ├── hash - Cryptographic hash digests │ │ ├── md5 │ │ ├── sha1 │ │ ├── sha224 │ │ ├── sha256 │ │ ├── sha384 │ │ └── sha512 │ ├── bcrypt - Password hashing and verification │ │ ├── hash │ │ └── verify │ └── jwt - JWT (JSON Web Token) utilities │ ├── encode │ ├── decode │ └── verify ├── Data Generation │ ├── uuid - Generate UUIDs │ │ ├── v1 │ │ ├── v3 │ │ ├── v4 │ │ ├── v5 │ │ └── v7 │ ├── token (secret, password) - Generate secure random tokens │ ├── lorem - Generate lorem ipsum text │ └── random - Generate random numbers ├── Text Processing │ ├── case - Convert text case formats │ │ ├── lower │ │ ├── upper │ │ ├── camel │ │ ├── title │ │ ├── constant │ │ ├── header │ │ ├── sentence │ │ ├── snake │ │ └── kebab │ ├── pretty-print (pp) - Unescape newlines and tabs │ └── diff - Compare text with visual output ├── Development Tools │ ├── calc (cal) - Expression calculator │ ├── json - JSON builder and utilities │ │ └── builder │ ├── regex - Interactive regex tester │ ├── crontab - Cron utilities │ │ └── schedule │ └── datetime (dt) - Parse and convert datetimes ├── Web & Network │ ├── http - HTTP utilities │ │ └── status │ ├── serve - Local HTTP file server │ └── qr - Generate QR codes ├── Color & Design │ └── color - Color utilities │ └── convert └── Reference └── unicode - Unicode symbol reference 

Encode and decode data using Base64 encoding.

• Supports both standard and URL-safe character sets
• Can read from files or stdin

ut base64 encode "hello world" ut base64 decode "aGVsbG8gd29ybGQ=" ut base64 encode --urlsafe "hello world" echo -n "hello world" | ut base64 encode -

URL encode and decode text.

ut url encode "hello world" ut url decode "hello%20world" printf "hello world" | ut url encode -

Generate cryptographic hash digests using various algorithms.

• Supports MD5, SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512
• Can read from files or stdin

ut hash sha256 "hello world" ut hash md5 - < file.txt echo -n "password" | ut hash sha256 -

Hash and verify passwords using the bcrypt algorithm.

• Secure password hashing with configurable cost factor
• Built-in salt generation for each hash
• Verification returns "valid" or "invalid"
• Cost factor range: 4-31 (default: 12, higher = more secure but slower)

# Hash a password with default cost (12) ut bcrypt hash "mypassword" echo -n "mypassword" | ut bcrypt hash - # Wrong password verification ut bcrypt verify "wrongpassword" '$2b$12$...' # Output: invalid

JWT (JSON Web Token) utilities for encoding, decoding, and verifying tokens.

• Support for HMAC algorithms (HS256, HS384, HS512)
• Encode with custom claims (iss, sub, aud, exp)
• Decode without verification (inspect token)
• Verify with signature validation

# Encode a JWT with custom claims ut jwt encode --payload '{"user":"alice"}' --secret "my-secret" --issuer "my-app" --expires-in 3600 # Decode a JWT without verification ut jwt decode eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9... # Verify a JWT with signature validation ut jwt verify TOKEN --secret "my-secret" --issuer "my-app"

Generate UUIDs in various versions.

• v1: Timestamp-based
• v3: Namespace + MD5 hash
• v4: Random
• v5: Namespace + SHA-1 hash
• v7: Timestamp-based, sortable

ut uuid v4 ut uuid v4 --count 5 ut uuid v5 --namespace DNS --name example.com ut uuid v7 ut uuid v7 --count 5

Generate cryptographically secure random tokens.

• Customizable length and character sets
• Uses OS-level secure randomness
• Can be used for passwords, API keys, session tokens, etc.

# Generate a 32-character token ut token --length 32 # Generate a password (using alias) ut password --length 16 # Generate without symbols ut secret --no-symbols --length 64 # Generate without uppercase letters ut token --no-uppercase --length 20

Generate lorem ipsum placeholder text.

• Customizable paragraph count and sentence structure

ut lorem --paragraphs 5 ut lorem --min-sentences 2 --max-sentences 6

Generate random numbers within a specified range.

• Supports decimal precision with step parameter
• Can generate multiple values at once

ut random --min 1 --max 100 ut random --min 0 --max 1 --step 0.01 --count 10

Convert text between different case formats.

• lowercase, UPPERCASE, camelCase, snake_case, kebab-case, Title Case, CONSTANT_CASE, Header-Case, Sentence case

ut case lower "Hello World" ut case camel "hello_world" ut case snake "HelloWorld" ut case kebab "HelloWorld" echo -n "Hello :)" | ut case lower -

Resolve escaped newlines and tab characters in text.

ut pretty-print "hello\nworld\ttab" ut pp "hello\nworld\ttab"

Compare text contents with visual diff output.

• Supports file comparison or interactive editing
• Color-coded character-level differences

ut diff -a file1.txt -b file2.txt ut diff # Opens editor for both inputs

Expression calculator with support for multiple number formats and mathematical functions.

• Supports arithmetic operations, exponentiation, functions (sin, cos, tan, log, exp, sqrt, abs, floor, ceil, round)
• Binary (0b), hexadecimal (0x), and decimal number formats
• Mathematical constants (pi, e)
• Results displayed in decimal, hex, and binary

ut calc "2 + 2 * 3" ut cal "sin(pi / 2)" ut calc "0xFF + 0b1010" ut calc "sqrt(16) ^ 2" echo -n "2 + 2" | ut calc -

JSON utilities including a powerful JSON builder.

• Build complex JSON structures using dot notation
• Supports nested objects and arrays
• Array indexing and append operations

ut json builder a.b.c=hello a.b.d=world ut json builder "user.name=John" "user.age=30" "user.tags[]=dev" "user.tags[]=rust" ut json builder "items[0].id=1" "items[0].name=first" "items[1].id=2"

Interactive regex tester with live highlighting.

• Real-time pattern matching visualization
• Multi-color highlighting for capture groups
• Load test strings from files

ut regex ut regex --test sample.txt

Parse crontab expressions and show upcoming firing times.

• Support for traditional 5-field cron expressions
• Support for extended 6-field cron expressions (with seconds)
• Configurable number of results with -n / --count
• Configurable start time with -a / --after

ut crontab schedule "0 9 * * 1-5" ut crontab schedule "0 0 * * *" --count 3 ut crontab schedule "0 9 * * 1-5" --after "2024-01-01T00:00:00Z" echo -n "0 9 * * 1-5" | ut crontab schedule -

Parse and convert datetimes between timezones.

• Support for ISO 8601 and custom format strings
• Convert between timezones
• "now" keyword for current time

ut datetime now ut dt "2025-10-04T15:30:00Z" --target-timezone "Asia/Tokyo" ut datetime "October 04, 2025 03:30 PM" --source-timezone UTC --parse-format "MonthName Day2, Year4 Hour12:Minute2 AMPM" echo -n "2025-10-04T15:30:00Z" | ut datetime -

HTTP utilities including status code lookup.

ut http status 404 ut http status # List all status codes

Start a local HTTP file server.

• Customizable host and port
• Directory listing support
• Optional HTTP Basic authentication

ut serve --port 8080 ut serve --directory ./public --auth username:password

Generate QR codes.

• Terminal display or save to PNG file

ut qr "https://example.com" ut qr "Hello World" --output qrcode.png echo -n "Hello World" | ut qr -

Color utilities for working with different color formats.

• Supports hex, rgb, rgba, hsl, hwb, lab, lch, oklab, oklch
• Parses any CSS-compatible color format

ut color convert "#FF5733" ut color convert "rgb(255, 87, 51)" ut color convert "hsl(9, 100%, 60%)" printf "#FF5733" | ut color convert -

Display Unicode symbol reference table.

ut unicode

• crontab explainer

# Run the project cargo run -- <tool> [args] # Format code cargo fmt # Run tests cargo test

Parts of this project were built using Claude Code, an AI-powered coding assistant, with human oversight and collaboration.

Contributions are welcome! Please feel free to submit a Pull Request.