The Private Toolkit for
Modern Engineers
Lightning-fast formatters, encoders, cryptographic generators, and inspectors running directly in your browser memory. Zero tracking, zero server calls.
DevFlow Pipeline Studio — Chain Developer Tools Together
Tired of copying and pasting across multiple browser tabs? Connect Base64 decoding, JSON formatting, JWT inspection, regex filtering, and SHA-256 hashing into a seamless zero-latency workflow.
Browse by Category
(75 total)Three.js 3D Scene Studio & Code Playground
Write and test Three.js 3D scene code in real-time with 12+ pre-installed procedural 3D templates, PBR studio lighting, camera controls, and live WebGL preview.
DevFlow Pipeline Studio
Visual developer workflow pipeline to chain, format, decode, filter, and hash payloads in zero-latency browser memory.
Delimited File Data Validator (CSV / TSV / TXT)
Validate CSV, TSV, and delimited TXT files against custom column schema rules, required fields, data types, regex, and unique checks with row-level error reporting.
Markdown Table to JSON
Convert GitHub-flavored Markdown tables into JSON objects with typed values.
JSON Formatter & Validator
Format, validate, query, filter, repair, and inspect JSON in real time with non-blocking Web Worker performance. 100% client-side.
JSON → Model
Convert JSON to C# classes or TypeScript interfaces with proper types.
JSON to Zod Schema Generator
Convert JSON payloads into strongly-typed Zod schemas and TypeScript types.
JSON to CSV & CSV to JSON Converter
Convert JSON arrays to CSV spreadsheets or CSV files to JSON with nested object flattening and live tabular preview.
JSON to SQL Schema & Query Converter
Convert JSON objects and arrays into SQL CREATE TABLE and INSERT INTO statements with automatic data type detection and multi-dialect support.
Age & Lifetime Milestone Calculator
Calculate your exact age down to the second, total days, hours, minutes, heartbeats, breaths, next birthday countdown, and planetary ages.
WCAG 2.1 Color Contrast Checker
Test foreground and background color combinations against WCAG 2.1 AA and AAA accessibility standards with live preview and color blindness simulation.
SemVer Calculator & Range Tester
Parse, validate, compare, sort, and calculate version increments according to SemVer 2.0.0 rules and NPM range expressions.
YAML <-> JSON Converter
Convert bidirectionally between YAML and JSON with real-time validation, key sorting, and custom indentation options.
cURL to Code Converter
Convert cURL commands into clean JavaScript fetch, Node.js Axios, Python requests, Go, Rust, or PHP code snippets instantly.
SQL Formatter & Prettifier
Format, indent, validate, and minify SQL queries online. Capitalize keywords, format clauses, and clean up raw database queries.
GraphQL Query Formatter
Format, prettify, validate, and minify GraphQL queries, mutations, and schemas online with custom indentation.
Dockerfile & Container Generator
Generate production-ready, secure, multi-stage Dockerfiles, .dockerignore, and docker-compose files with built-in security auditing.
Docker Run to Compose Converter
Convert single or multi-line docker run commands into clean, production-ready docker-compose.yml YAML configurations instantly.
SVG to JSX / React Converter
Transform raw SVG markup into clean, optimized React JSX / TSX icon components with TypeScript types, custom props, and currentColor support.
QR Code Generator
100% Safe & Secure QR Code Generator. Create infinite vector QR codes (SVG, EPS) and high-res PNGs with transparent background, custom shapes, and zero tracking.
QR Code Scanner
Scan and decode QR codes from your webcam or by uploading image files (PNG, JPEG, WebP, SVG) completely offline and in-browser.
.gitignore Generator
Generate a clean, deduplicated .gitignore file for your language, framework, editor, and operating system—entirely in your browser.
HMAC Generator & Calculator
Calculate HMAC-SHA256, HMAC-SHA512, and HMAC-SHA1 signatures for webhook verification and API security.
Bcrypt Hash Generator & Verifier
Generate secure bcrypt password hashes with adjustable cost factors, analyze hash structures, and verify plaintext passwords against existing hashes.
CIDR & Subnet Calculator
Calculate IPv4 CIDR blocks, usable host IP ranges, subnet masks, wildcard masks, and binary network breakdowns.
String Escape & Unescape
Escape and unescape strings for JSON, JavaScript, Python, Java, C#, SQL, CSV, HTML, and Shell.
Large CSV & TXT Table Viewer (Up to 1GB)
View, parse, and analyze massive pipe-separated or delimited CSV and TXT files up to 1GB in a fast paginated table directly in your browser with zero memory freeze.
Number Base Converter
Convert numbers across Decimal, Binary, Hexadecimal, Octal, and custom bases (Base 2-36) with two's complement details.
CSS Unit & Fluid clamp() Converter
Convert between PX, REM, EM, VW, VH, %, and PT with Tailwind CSS class matching and fluid clamp() generator.
Keycode & Keyboard Event Inspector
Inspect JavaScript KeyboardEvent attributes (key, code, which, keyCode, modifiers) with live keypress capture and event handler code generator.
Base64
Encode plain text to Base64 or decode Base64 back to plain text.
URL Encoder / Decoder
Encode or decode URLs and query string parameters instantly in your browser.
HTML Entity Encoder
Encode plain text into safe HTML entities and decode entity strings back into readable text in your browser.
Text Diff
Compare two text blocks line-by-line and highlight every change.
UUID Generator
Generate RFC 4122 v4 UUIDs one at a time or in bulk up to 100.
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, expiry and more.
HTML Formatter
Format and minify HTML code for better readability or compactness.
Password Generator
Generate strong, random passwords with customizable length and character sets.
Lorem Ipsum Generator
Create placeholder paragraphs for wireframes, prototypes, content mocks, and layout testing.
Regex Tester & Checker
Test and check regular expressions online live against sample text with real-time match and group highlighting.
Case Converter
Convert text between uppercase, lowercase, camelCase, snake_case, kebab-case and more.
Slug Generator
Convert titles and labels into clean kebab-case or snake_case slugs entirely in your browser.
Markdown Preview
Write Markdown on the left and see a live preview on the right.
SHA-256 Hash Generator
Generate a SHA-256 hash from any input string instantly in your browser.
Word Counter
Count words, characters, sentences, paragraphs and reading time instantly.
Timestamp Converter
Convert Unix timestamps, ISO dates, and local date strings instantly in your browser.
Cron Expression Parser
Parse, explain, and calculate execution times for 5-part cron expressions.
Query String Parser
Parse URL query strings into readable key/value pairs and JSON entirely in your browser.
Color Converter
Convert HEX, RGB, and HSL values instantly with a live color preview. Free and fully client-side.
HTTP Status Lookup
Search common HTTP response codes and their meanings while debugging APIs. Runs entirely in your browser.
MIME Type Lookup
Look up common file extensions, content types, and browser-facing MIME labels while working with uploads or headers.
User Agent Parser
Parse raw browser user agent strings into browser, engine, operating system, and device hints.
ASCII Table
Browse ASCII characters in decimal, hex, and binary with search and quick copy actions.
Hash Comparator
Compare two hashes or checksums after trimming whitespace and normalizing letter case.
HTTP Header Parser
Parse raw HTTP request or response headers into structured rows and JSON.
Basic Auth Header
Generate and decode HTTP Basic Authorization headers using username and password pairs.
Unix Permissions Calculator
Convert read, write, and execute bits into chmod octal and symbolic permission strings.
Local AI Text Assistant
Summarize text, surface keywords, detect action items, and estimate sentiment fully in JavaScript with no API.
CSV to Markdown
Convert CSV or TSV data into a well-formatted Markdown table instantly.
Hex Converter
Convert text to hexadecimal and hexadecimal back to text.
MAC Address Generator
Generate valid unicast, multicast, locally administered, or vendor-specific MAC addresses in colon, hyphen, or dot formats.
RSA Key Generator
Generate RSA public and private key pairs securely in your browser.
SVG Placeholder
Generate fast, customizable SVG placeholder images for your projects.
URL Parser
Parse URLs into their component parts (protocol, host, path, parameters).
XML Formatter
Format, beautify or minify XML strings natively in your browser.
Line Sorter & Deduplicator
Sort lines alphabetically, by length, or naturally — remove duplicates, trim whitespace, and drop empty lines.
Number to Words Converter
Convert numbers into English words — supports decimals, negative values, and magnitudes up to 999 trillion.
Text Repeater & Multiplier
Replicate and repeat text, characters, or strings up to thousands of times with custom separators and formatting options.
AI Token Counter & Visualizer
Estimate token sizes, inspect character segments, and calculate pricing across GPT-4o, Claude, Gemini, and Llama encoders.
JWT Encoder & Token Generator
Create and sign JSON Web Tokens (JWT) with HMAC algorithms (HS256/HS384/HS512) entirely in your browser.
Cron Expression Generator
Build cron scheduling expressions with interactive controls, presets, and human-readable descriptions.
Password Strength Analyzer
Analyze password entropy, estimate crack times, detect common patterns, and get actionable improvement tips — all in your browser.
Faker Data Generator
Generate realistic fake names, emails, phones, addresses, IPs, UUIDs, and sentences for testing — entirely in your browser.
JSON Schema Generator & Validator
Convert JSON payloads into Draft-07, Draft 2020-12, or OpenAPI JSON Schemas with live validation.
X.509 Certificate Decoder & Inspector
Decode and inspect PEM SSL/TLS X.509 certificates, SANs, validity dates, and fingerprints privately.
100% Client-Side Privacy
Your code, API keys, JSON strings, and secrets never leave your device. All parsing, hashing, and encoding happens entirely inside your browser JS runtime.
Zero Latency & Offline Ready
No network latency or server bottlenecks. Every transformation executes synchronously at native WebAssembly and JS V8 speeds.
No Ads, Trackers, or Bloat
Zero telemetry, no popups, no cookie banners, and no clutter. Just clean, developer-focused utilities designed for high productivity.