Show HN: ut – Rust based CLI utilities for devs and IT

1 month ago 8

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.

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

Run ut --help to see all available tools, or ut <TOOL> --help for specific tool documentation.

├── Encoding │ ├── base64 - Base64 encode/decode │ │ ├── encode │ │ └── decode │ └── url - URL encode/decode │ ├── encode │ └── decode ├── Hashing │ └── hash - Cryptographic hash digests │ ├── md5 │ ├── sha1 │ ├── sha224 │ ├── sha256 │ ├── sha384 │ └── sha512 ├── Data Generation │ ├── uuid - Generate UUIDs │ │ ├── v1 │ │ ├── v3 │ │ ├── v4 │ │ └── v5 │ ├── token - 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 │ ├── pretty-print - Unescape newlines and tabs │ └── diff - Compare text with visual output ├── Development Tools │ ├── calc - Expression calculator │ ├── json - JSON builder and utilities │ │ └── builder │ ├── regex - Interactive regex tester │ └── datetime - 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"

URL encode and decode text.

ut url encode "hello world" ut url decode "hello%20world"

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

Generate UUIDs in various versions.

v1: Timestamp-based
v3: Namespace + MD5 hash
v4: Random
v5: Namespace + SHA-1 hash

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

Generate cryptographically secure random tokens.

Customizable length and character sets
Uses OS-level secure randomness

ut token --length 32 ut token --no-symbols --length 64

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, Title Case, CONSTANT_CASE, Header-Case, Sentence case

ut case lower "Hello World" ut case camel "hello_world" ut case snake "HelloWorld"

Resolve escaped newlines and tab characters in text.

ut pretty-print "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 calc "sin(pi / 2)" ut calc "0xFF + 0b1010" ut calc "sqrt(16) ^ 2"

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 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 datetime "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"

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

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%)"

Display Unicode symbol reference table.

Fast: Built in Rust for optimal performance
Standalone: Single binary with no runtime dependencies
Composable: Tools work with stdin/stdout for easy piping
Secure: Uses cryptographically secure random number generators where appropriate
Cross-platform: Works on Linux, macOS, and Windows