First-party catalog

Tools

A comprehensive directory of practical engineering utilities, with new additions shipping regularly.

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Category

Format

4 tools

Format CSS

format CSS code with indentation

Format JSON

pretty-print JSON

Format SQL

format SQL queries

Format XML

format XML markup

Category

Minify

4 tools

Minify CSS

minify CSS source

Minify JSON

minify JSON text

Minify SQL

collapse SQL whitespace

Minify XML

remove XML formatting whitespace

Category

Encode

9 tools

Add Slashes

escape quotes and slashes

ASCII to Hex

convert ASCII text to hexadecimal bytes

Base64 Encode

encode text into Base64

HTML Encode

encode text as HTML entities

HTML Encode All

encode all characters into entities

ROT13

apply ROT13 substitution cipher

URL Defang

defang URLs for safe sharing

URL Encode

URL-encode text

URL Entities Encode

encode URI entities while preserving URL separators

Category

Decode

9 tools

Base64 Decode

decode Base64 text

Hex to ASCII

decode hexadecimal bytes to text

HTML Decode

decode HTML entities

JWT Decode

decode JWT header and payload

PHP Unserialize

convert PHP serialized payloads to JSON

Remove Slashes

unescape slashed quotes and backslashes

URL Decode

decode URL-encoded text

URL Entities Decode

decode URI entity text

URL Refang

restore defanged URLs

Category

Hash

4 tools

MD5

calculate an MD5 hash

SHA1

calculate a SHA1 hash

SHA256

calculate a SHA256 hash

SHA512

calculate a SHA512 hash

Category

Case

7 tools

Camel Case

convert text to camelCase

Downcase

convert text to lowercase

Kebab Case

convert text to kebab-case

Snake Case

convert text to snake_case

Sponge Case

alternate lowercase and uppercase letters

Start Case

convert text to Start Case

Upcase

convert text to uppercase

Category

Time

12 tools

Countdown Timer

run quick timers with presets and completion feedback

Cron Builder + Explainer

build cron schedules with beginner-friendly presets and preview upcoming run times

Date to Timestamp

convert date strings to Unix timestamps

Date to UTC

convert date strings to UTC text

Duration Converter

convert between nanoseconds, microseconds, milliseconds, seconds, and larger time units including months and years

Event Countdown Tracker

track future events with live day/hour/minute/second countdowns

Fasting Timer Tracker

track intermittent fasting and eating windows with live progress and local stats

Multi Timezone Planner

compare multiple timezones with live clocks, running seconds, and a shared hourly timeline

Pomodoro Timer

run configurable focus sessions with automatic short and long break cycles

Stopwatch

track elapsed time with lap splits and quick reset controls

Timezone + Unix Timestamp Utility

convert between timestamps and timezone-formatted dates

World Clock

track multiple places with live digital clocks and saved 12/24-hour settings

Category

Crypto

2 tools

ETH Unit Converter

convert between wei, gwei, ether, and extended ethereum denomination units

SOL Unit Converter

convert between lamports, microSOL, milliSOL, and SOL units

Category

Sort

3 tools

Natural Sort

sort lines using natural numeric order

Sort JSON

sort object keys recursively

Sort Lines

sort lines alphabetically

Category

Kubernetes

2 tools

Kubernetes Secret Manifest Creator

convert JSON or .env values into a base64-encoded Kubernetes Secret manifest YAML

Kubernetes Secret Manifest Decoder

decode base64 Secret data from JSON maps or full Kubernetes Secret manifests into plain JSON and .env output

Category

Calculators

2 tools

Health

BMI Calculator

calculate body mass index from height and weight in metric or imperial units, with WHO category classification

Other

Transfer Time Calculator

estimate upload or download time using data size and bandwidth values

Category

Converters

19 tools

Units

Area Converter

convert between metric and imperial area units, from square millimeters to square kilometers and square inches to square miles

Bandwidth Converter

convert network throughput between bit and byte rate units

Data Size Converter

convert between decimal and binary storage units from bytes through yottabytes

Distance Converter

convert between metric and imperial distance units, from nanometers to kilometers and inches to miles

Number Bases

Binary to Decimal

convert binary numbers to decimal

Decimal to Binary

convert decimal numbers to binary

Decimal to Hex

convert decimal numbers to hexadecimal

Hex to Decimal

convert hexadecimal numbers to decimal

Number Base Converter

convert integers across binary, octal, decimal, and hexadecimal formats

File Formats

CSV to JSON

convert CSV data to JSON arrays

JSON to CSV

convert JSON arrays to CSV

JSON to Query String

convert JSON objects to URL query strings

JSON to YAML

convert JSON to YAML

Query String to JSON

convert URL query strings to JSON

YAML to JSON

convert YAML to JSON

Other

Android to iOS Strings

convert Android XML strings to iOS format

Fish Hex Path Converter

decode fish shell hex-encoded paths

Hex to RGB

convert hex colors to rgb()

iOS to Android Strings

convert iOS strings format to Android XML

Category

Editors

2 tools

Markdown Editor + Previewer

edit markdown with live preview, fullscreen mode, and local draft persistence

Mermaid Diagram Editor + Previewer

edit Mermaid diagram syntax with live SVG preview, zoom controls, fullscreen mode, and local draft persistence

Category

Utility

25 tools

Text

ASCII Art Generator

convert text into stylized ASCII art banners

Collapse Whitespace

collapse repeated whitespace into single spaces

Deburr

remove accents and diacritics

Lorem Ipsum

generate placeholder text by word count

Markdown Quote

prefix each line with Markdown quote syntax

Remove Duplicates

remove duplicate lines

Replace Smart Quotes

replace typographic punctuation with plain ASCII

Reverse Lines

reverse line order

Reverse String

reverse characters in text

Shuffle Lines

randomize line order

Trim

trim leading and trailing whitespace

Image & Media

Barcode Generator

generate common barcode formats from text values

Barcode Scanner

scan barcode values from camera or uploaded images

Image Resizer

resize JPEG, PNG, and WebP images client-side

PNG Background Remover

remove image backgrounds client-side with configurable threshold controls

QR Code Generator

generate QR code images from text or URLs

QR Code Scanner

scan and decode QR payloads from camera or images

Generators

Fake Data Generator (Faker.js)

generate realistic fake datasets for testing, demos, and local development

Markdown Table of Contents Generator

generate markdown table of contents links from markdown headings

UUID/ULID/NanoID Generator

generate UUID v1/v3/v4/v5/v6/v7/v8, ULID, or NanoID identifiers

Security & Auth

API Signature Tool

sign and verify webhook payloads using HMAC SHA algorithms

Certificate/CSR Generator + PEM Inspector

generate CSRs/certificates and inspect PEM metadata

JWT Token Generator

generate signed JWT tokens using plain secrets, RSA private keys, or ECDSA private keys

Password + Token Generator

generate secure passwords and tokens with entropy scoring

SSH Key Generator + Inspector

generate RSA/ECDSA keypairs and inspect PEM/OpenSSH key metadata

Category

Analyze

10 tools

Counters

Count Characters

count all characters in input text

Count Lines

count lines in multiline input

Count Words

count words separated by whitespace

Inspectors

JWT/JWS/JWK Toolkit

decode tokens, verify signatures, inspect claims, and compare key metadata

Regex Tester (JavaScript Only)

test JavaScript regex patterns with live highlighting, captures, and explanations

Text Diff Analyzer

compare two text blocks with side-by-side diff analysis and character-level highlights

URL Inspector

break down a URL into host, path, and query parameter parts

Analyzers

JSON Schema Validator + Example Generator

validate payloads against schema and generate sample data

JSON Size Analyzer

analyze JSON size breakdown by path and structure

LLM Token Analyzer

analyze OpenAI token boundaries, IDs, and token counts