$ whoami

~/tool-stack_

// 46 offline-ready tools. no tracking. no telemetry.

/* Security */

>_jwt

Decode and inspect JWT tokens

>_jwt-gen

Sign JWT tokens with HS256 in the browser

>_hash

Generate SHA-1, SHA-256, SHA-512 hashes

>_hmac

Generate HMAC signatures using SHA-256, SHA-512, and more

>_bcrypt

Hash and verify passwords with bcrypt

>_password

Generate strong, secure passwords

/* Network */

>_cidr

Calculate subnet details from CIDR notation

>_chmod

Calculate Unix file permission modes visually

>_dns

Query A, AAAA, MX, TXT, CNAME, and NS records for any domain

>_ip

Look up geolocation and network info for any IP address

/* Converters */

>_base64

Encode and decode Base64 strings

>_url

Encode and decode URL strings

>_html

Encode and decode HTML entities

>_base

Convert between binary, octal, decimal, and hex

>_color

Convert between HEX, RGB, and HSL

>_yaml

Convert between YAML and JSON formats

>_case

Convert between camelCase, snake_case, kebab-case, and more

>_image

Crop, resize, rotate, flip, and convert images in the browser

/* Formatters */

>_json

Format and validate JSON data

>_json-ts

Generate TypeScript types and interfaces from JSON

>_xml

Format and validate XML documents

>_csv

Parse and preview CSV data as a formatted table

>_markdown

Write and preview markdown with live rendering

/* Generators */

>_uuid

Generate random UUIDs v4

>_lorem

Generate placeholder lorem ipsum text

>_qr

Generate QR codes from any URL or text

>_qr-scan

Scan QR codes via live camera or image upload

/* Playgrounds */

>_stackblitz

Full-featured code playground — React, Vue, Svelte, Node.js and more

>_codesandbox

Cloud development environments — React, Vue, Angular, Next.js and more

>_jsfiddle

Write HTML, CSS, and JavaScript with live preview — jQuery, React, Vue and more

>_html-playground

Write HTML, CSS, and JS with a live preview

>_ts-playground

Write and run TypeScript in the browser — see compiled JS and type errors

>_rest-client

Send HTTP requests and inspect responses in the browser

>_sql

Run SQL queries in the browser with SQLite

>_diagram

Create ER diagrams, flowcharts, and more with draw.io

>_whiteboard

Sketch diagrams and wireframes with Excalidraw

/* Utilities */

>_regex

Test regular expressions with live highlighting

>_cron

Parse cron expressions and preview next runs

>_semver

Test npm semver ranges against version numbers

>_diff

Compare two texts and highlight differences

>_escape

Escape strings for JSON, Regex, HTML, and Unicode

>_sort

Sort, deduplicate, and clean up lines of text

>_text

Count characters, words, lines, and bytes

>_ascii

Browse and copy ASCII characters and code points

>_timestamp

Convert Unix timestamps to dates

>_tz

Convert UTC time to all major world timezones