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All Tools (100+)
Developer Cheat Sheets (32+)
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Data Converters
CSS & Frontend
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Security & Hashes
Text Utilities
ESC
Tools & Utilities
JSON to CSV Converter
Transform nested or tabular JSON datasets into clean, spreadsheet-ready CSV files with custom delimiters and automatic key flattening.
Popular
CSV to JSON Converter
Instantly convert CSV files and spreadsheet data into valid, nicely indented JSON structures for web APIs, testing, and databases.
Core Tool
JSON to YAML Converter
Convert JSON payloads into clean, indented YAML format with strict indentation for Docker, Kubernetes, and cloud configs.
DevOps
YAML to JSON Converter
Translate YAML configurations into strictly formatted JSON for API consumption, programmatic testing, and database ingestion.
DevOps
JSON Formatter & Beautifier
Transform messy, unformatted, or minified JSON into clean, readable code with syntax validation and 1-click indentation options.
Top Tool
SQL Query Formatter & Beautifier
Beautify messy, single-line SQL queries with structured indentation and standard uppercase SQL keywords (SELECT, FROM, WHERE, JOIN).
Database
Markdown to HTML Converter
Compile Markdown text into clean, semantic HTML5 code with instantaneous browser rendering and 1-click HTML copy.
Content
Base64 Encoder & Decoder
Encode strings into RFC 4648 Base64 representation or decode Base64 payloads back to readable UTF-8 text.
Standard
URL Encoder & Decoder
Safely encode special characters into percent-encoded (%20, %26) URI components or decode encoded URLs back to human-readable strings.
Web Standard
PX to REM Converter & Cheat Sheet
Convert PX to REM and REM to PX in real-time with customizable base font size (16px default) and comprehensive typography reference tables.
High Search Vol
CSS clamp() Calculator for Fluid Typography
Generate fluid, responsive font sizes and spacing that scale smoothly across mobile and desktop screens without media query breakpoints.
Modern CSS
Aspect Ratio Calculator (16:9, 4:3, 21:9)
Calculate matching dimensions, aspect ratio fractions, and CSS aspect-ratio properties with instant presets for popular device resolutions.
Essential
CSS Box Shadow Generator
Design multi-layered CSS box shadows visually with real-time preview, opacity sliders, blur spread controls, and 1-click CSS code export.
Interactive UI
CSS Glassmorphism & Frosted Glass Generator
Design sleek frosted glass UI elements with adjustable backdrop-filter blur, background opacity, outline highlights, and instant CSS export.
Trending UI
CSS Gradient Generator (Linear & Radial)
Create multi-color linear and radial gradients with real-time canvas preview, custom angle rotation, and production-ready CSS rules.
Design
SEO Meta Tag & Open Graph Generator
Create complete SEO meta tags, Open Graph tags, and Twitter Cards with character limit indicators to maximize your Google rankings and social CTR.
SEO Core
Robots.txt File Generator
Generate clean robots.txt directives to guide search engine web crawlers, protect private directories, and declare XML sitemaps.
Crawl Control
.htaccess 301 Redirect & Security Generator
Create tested Apache mod_rewrite directives: enforce HTTPS, consolidate canonical domains (www vs non-www), and set up permanent 301 redirects.
Apache
HTML Minifier & Compressor
Strip unnecessary whitespace, redundant comments, and line breaks from HTML documents to boost page speed and lower bandwidth consumption.
PageSpeed
SHA-256 Hash Generator
Compute 256-bit (64 hex characters) cryptographic hash checksums for any input string using browser-native Web Crypto APIs.
Cryptography
MD5 Hash Checksum Generator
Calculate 32-character hexadecimal MD5 hash checksums for cache busting, database keys, and file integrity verification.
Checksum
Strong Password Generator & Entropy Checker
Create cryptographically secure, high-entropy passwords and API secret keys using the Web Cryptography API random number generator.
Security
UUID v4 Generator (Single & Bulk)
Generate standard RFC 4122 compliant version 4 UUIDs (Universally Unique Identifiers) for database primary keys, distributed systems, and API tracking.
RFC 4122
JWT (JSON Web Token) Debugger & Inspector
Decode Base64Url encoded JWTs to inspect authentication headers, payload claims (iss, sub, exp), and verify token expiration in real-time.
API Security
Word, Character & Sentence Counter
Calculate real-time text metrics: word count, characters, sentences, paragraphs, reading time, and estimated speaking duration.
Essential
String Case Converter (camelCase, snake_case, Title Case)
Transform variable names, article headlines, and code identifiers between camelCase, snake_case, kebab-case, UPPERCASE, and Title Case.
Popular
URL Slug Generator (SEO Slugify)
Transform blog post titles and page headings into clean, lowercase, hyphenated URL slugs optimized for search engine indexing.
SEO Core
Lorem Ipsum Dummy Text Generator
Generate standard Cicero dummy placeholder text for website wireframes, UI mockups, and typography testing with custom paragraph counts.
Design
Duplicate Line Remover & Text Sorter
Clean up email lists, keyword lists, and data exports by stripping duplicate entries, trimming extra spaces, and sorting alphabetically.
Utility
REM to PX Converter
Convert REM units back to pixel dimensions with customizable root font sizes (16px default) for CSS layout development.
CSS3
HEX to RGB & HSL Color Converter
Convert web colors across HEX (#3b82f6), RGB (rgb(59, 130, 246)), and HSL formats with interactive color preview and 1-click CSS copying.
Design
CSS Minifier & Optimizer
Compress CSS stylesheets by stripping comments, spaces, and line breaks to minimize render-blocking stylesheet latency.
Performance
JavaScript Minifier & Code Compressor
Compress JavaScript files safely by stripping multi-line and single-line comments, superfluous spaces, and newline characters.
Performance
SHA-512 Cryptographic Hash Generator
Compute 512-bit (128 hexadecimal characters) SHA-2 family hashes for mission-critical checksums, blockchain verification, and token verification.
High Security
Text Diff Checker (Side-by-Side Compare)
Compare two versions of code, configuration files, or documents side-by-side to highlight additions, deletions, and line modifications.
Developer Tool
HTML to Markdown Converter
Convert raw HTML documents and CMS rich text into clean Markdown syntax for static site generators (Astro, Hugo, Jekyll) and documentation.
Content Migration
User Agent String Parser & Client Inspector
Parse HTTP User-Agent header strings to identify browser names, software versions, operating systems, and device form factors.
Network Info
JSON to TypeScript Interface Generator
Instantly transform raw JSON payloads into clean, idiomatic TypeScript interfaces and types for front-end React, Vue, and Node.js codebases.
TypeScript
Unix Timestamp & Epoch Converter
Convert between Unix timestamps (seconds & milliseconds) and human-readable UTC/local date formats with live current timestamp counter.
Time Utility
Free QR Code Generator Online
Create high-resolution QR codes for website URLs, contact info, and text strings. Custom sizes and immediate 1-click PNG image download.
Marketing
WCAG Color Contrast Ratio Checker
Verify text and background color combinations against Web Content Accessibility Guidelines (WCAG 2.1) for Level AA and Level AAA compliance.
WCAG 2.1
Harmonious Color Palette Generator
Create balanced design color palettes from any base HEX color: complementary, analogous, triadic, and monochromatic schemes with 1-click CSS copying.
Design System
HTML Entity Encoder & Decoder
Safely escape reserved HTML characters (<, >, &, ", ') into named or numeric entities to prevent XSS vulnerabilities and rendering glitches.
Web Standard
SVG Code Cleaner & Optimizer
Strip XML metadata, Illustrator/Figma export junk, and superfluous namespaces from SVGs to optimize asset payload weight for high Core Web Vitals.
Performance
CSS Pure Triangle Generator
Design pure CSS triangles using transparent border geometry with custom direction, dimensions, color picker, and 1-click CSS export.
CSS Shapes
cURL to JavaScript Fetch & Python Converter
Transform raw cURL command lines into clean, production-ready JavaScript fetch(), Python requests, or Axios API call snippets.
High Intent
HTML to React JSX & TSX Converter
Transform raw HTML5 markup into compliant React JSX/TSX syntax: auto-replaces class with className, for with htmlFor, and self-closes tags.
React & Next.js
CSS Grid Layout Generator
Design complex CSS grid structures with custom column/row counts and gaps. Preview your layout in real time and copy ready-to-use CSS rules.
Visual Builder
CSS Flexbox Playground & Generator
Experiment with modern CSS Flexible Box properties visually. Tweak alignments, wrapping, and spacing with instant live preview and 1-click CSS export.
Interactive
Online Regex Tester & Debugger
Evaluate regex patterns against sample text in real time with visual match highlighting, capture group breakdown, and ready-to-use common pattern presets.
High Traffic
Bcrypt Hash Generator & Verifier
Create salted Bcrypt password hashes and test password matches against existing hashes locally in your browser with zero network exposure.
Backend Security
JSON to JSON Schema Converter
Auto-generate structured draft-07 compliant JSON Schema definitions from any JSON input with type inference and automatic required properties.
API Tools
URL Parser & Query String Editor
Dissect any web URL into its fundamental protocol, hostname, path, and query parameters. Edit or add parameters in a table and rebuild updated URLs instantly.
Developer Utility
Markdown Table Generator & Editor
Create and edit structured Markdown tables with an interactive GUI table builder. Supports column alignment and instant 1-click Markdown copying.
Documentation
Cron Expression Generator & Explainer
Generate valid crontab schedule expressions with visual interval controls and instant human-readable English translation for Linux and cloud schedulers.
DevOps & Cloud
Campaign URL Builder & UTM Generator
Construct validated marketing campaign URLs with proper UTM parameters for GA4, newsletters, social media, and paid ads with instant 1-click copy.
SEO & Growth
CIDR Subnet Calculator & IPv4 Range Finder
Instantly calculate network netmasks, broadcast addresses, usable IP address ranges, and total host capacities from any IP and CIDR prefix.
DevOps & Network
Tailwind CSS Color Palette Generator
Pick any base HEX color and automatically generate a balanced 10-shade palette (50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 950) for your Tailwind UI.
Frontend UI
Image to Base64 & Data URI Converter
Drop or select PNG, JPG, WebP, or SVG files to instantly encode them into Base64 Data URIs, HTML image tags, and CSS background rules without uploading.
100% Private
Mock API Data & Fake JSON Generator
Generate realistic placeholder JSON datasets with customizable record counts for prototyping frontend interfaces and testing API workflows.
API Mocking
Visual HTML Table Generator
Build and customize structured HTML tables visually. Tweak table cells, headers, and alignments with instant 1-click semantic HTML export.
Webmaster Tool
JSON Diff & Comparison Tool
Perform side-by-side structural comparison of two JSON payloads. Highlights modified, added, and deleted properties with zero server logging.
Debugging
Open Graph & Social Share Preview Generator
Simulate social media share cards for Twitter, Facebook, and LinkedIn in real time. Validate image ratios and export ready-to-paste meta tags.
Social SEO
JSON-LD Schema Markup Generator
Generate structured schema.org markup in JSON-LD format to qualify for Google rich search results, review stars, and FAQ accordion snippets.
Rich Snippets
Google SERP Snippet Simulator & Pixel Calculator
Preview and optimize how your pages appear on Google search results. Real-time title pixel width warnings, mobile/desktop toggle, and rich star ratings.
SERP Preview
cURL to Python Requests Converter
Convert raw cURL shell commands into production-ready Python code using the requests library. Supports authentication, headers, and JSON payloads.
API & Code
HMAC Hash & Signature Generator
Generate cryptographic HMAC signatures with custom secret keys using the browser's hardware-accelerated WebCrypto API. Zero data transmitted over the network.
Webhooks & Crypto
XML to JSON Converter
Parse and convert XML data into structured, indented JSON with zero server latency. Preserves tags, values, and attributes client-side.
XML & JSON
8-Value CSS Border Radius Generator
Create organic blob shapes and custom corner curvatures using 8-value border-radius syntax. Visual sliders with instant copy-paste CSS.
Organic Shapes
CSS Text Shadow Generator
Build multi-layered, striking CSS text shadows with real-time typography preview. Adjust horizontal/vertical offsets, blur radius, and shadow color.
Typography
JSON Path Finder & Tree Inspector
Inspect and navigate nested JSON structures interactively. Click any key to copy its exact dot notation or JSONPath query directly to clipboard.
API Inspection
ASCII Text to Hex, Binary & Decimal Converter
Convert plain text into binary (01010011...), hexadecimal (53 65 63...), decimal, and octal encodings with instant 1-click copy.
Binary & Hex
SQL to JSON Converter
Convert SQL INSERT statements and database table dumps into structured JSON arrays. Automatically infers numbers, strings, and booleans.
DB Migration
JSON to XML Converter
Transform complex JSON payloads and arrays into clean, indented XML documents. Supports root element naming and nested structures.
Data Serialization
TSV to JSON Converter
Convert tab-delimited text copied directly from Microsoft Excel or Google Sheets into structured JSON arrays of objects.
Excel & Sheets
CSS Neumorphism (Soft UI) Generator
Design tactile Soft UI components with dual light and dark shadow physics. Sliders for elevation, blur, radius, and shape curvature.
Soft UI
Color Tints & Shades Generator
Produce an entire ramp of tints (white mixed) and shades (black mixed) from any brand color. Includes 1-click copy and WCAG contrast ratings.
Palettes & WCAG
HTML Entity Decoder & Encoder
Convert between HTML entities (named, decimal, hexadecimal) and literal characters with bidirectional instant conversion.
Encodings
Lorem Ipsum Markdown Generator
Generate structured dummy Markdown documents with realistic headings, checklists, code blocks, tables, and blockquotes for SSG and doc testing.
Documentation
User-Agent Generator & Header Library
Search, filter, and copy authentic User-Agent strings for desktop browsers, mobile devices, tablets, and search engine crawlers with 1-click copy.
Scraping & QA
Cron Expression Descriptor & Human Explainer
Convert standard 5-part crontab schedule expressions into clear, plain English descriptions with upcoming execution timestamps.
Automation
Mock JSON API Generator & Dummy Data
Instant mock JSON array generator with realistic user profiles, e-commerce products, financial orders, and ISO timestamps for API mocking.
API Mock
CSS Clip-Path Shape Generator
Design geometric clip-path shapes including polygons, stars, hexagons, arrows, and speech bubbles with instant CSS code export.
Polygons & Shapes
SVG to Data URI Converter & CSS Inliner
Instantly encode raw SVG vector code into compact, URL-encoded Data URIs ready for CSS background-image and HTML tags.
Vector & CSS
Timestamp Difference & Duration Calculator
Calculate precise duration, days, hours, minutes, and working business days between two timestamps, epochs, or dates.
Time & Date
Meta Tags & Social Snippet Analyzer
Paste any HTML snippet or meta tags to analyze title lengths, meta descriptions, Open Graph cards, canonical tags, and SERP health.
SERP & Social
Linux Chmod Permissions Calculator
Interactive 3x3 permission grid for Owner, Group, and Others. Instantly computes numeric octal masks, symbolic notation, SUID/SGID bits, and terminal commands.
Sysadmin
IP Range to CIDR Subnet Calculator
Calculate the minimal set of CIDR subnet blocks covering any IP address range (IPv4). Ideal for cloud security groups, AWS VPC, UFW, and routing tables.
Network & Cloud
CSS Keyframes Animation Generator
Create smooth CSS @keyframes animations with interactive presets, timing functions, durations, iterations, and 1-click ready-to-paste CSS rules.
UI & Motion
Base64 to Image Decoder & Previewer
Paste any Base64 encoded string or image Data URI to instantly decode, inspect width/height and file size, and download the original PNG, JPG, WebP, or SVG file.
Decoder
Online DNS Record Lookup & Inspector
Lookup and audit DNS records across A, AAAA, MX, TXT, CNAME, NS, and SOA using high-speed DNS-over-HTTPS (DoH).
DoH Live
HTTP Security Headers Analyzer & Auditor
Analyze raw server response headers, detect missing security policies (HSTS, CSP, X-Frame-Options, Permissions-Policy), and export ready-to-paste Nginx and Apache configs.
Auditor
UUID v7 & v4 Generator & Timestamp Inspector
Generate time-ordered, B-Tree index-friendly UUID v7 identifiers based on RFC 9562. Decode embedded millisecond timestamps and inspect versions.
RFC 9562
SVG Path Visualizer & Bounds Inspector
Paste any SVG path data attribute to render interactive vector outlines, inspect total path length, bounding dimensions, and coordinate commands.
Vector UI
HTML Table to Markdown & CSV Converter
Transform raw HTML tables into clean, aligned GitHub Flavored Markdown (GFM) tables and spreadsheet-ready CSV with 1-click copy.
Markdown
Image EXIF Metadata Stripper & Privacy Cleaner
Protect personal privacy by inspecting and stripping hidden EXIF metadata, GPS latitude/longitude, and camera models from photos before publishing online.
Privacy Tool
HTTP Archive (HAR) Analyzer & Performance Waterfall
Upload or paste browser DevTools network .har export files to analyze page load waterfalls, request counts, transfer weights, and HTTP status codes.
DevOps & CWV
TOML to JSON & YAML Converter
Transform Tom's Obvious Minimal Language (TOML) files into clean, formatted JSON or YAML with instant client-side parsing and 1-click copy.
Configuration
CSS Hex to Color Filter Converter
Calculate the exact CSS filter rules needed to transform a black (#000000) SVG icon or image into any custom target Hex, RGB, or HSL color.
Vector UI
Content Security Policy (CSP) Generator & Validator
Build robust Content-Security-Policy headers with interactive directive toggles, third-party service presets (GTM, AdSense, Stripe), and real-time security analysis.
XSS Defense
Cheat Sheets & References
View All Cheat Sheets Hub
32+ Matrices
Git Commands Reference Matrix
40+ Cmds
Docker & Docker Compose Cheat Sheet
35+ Cmds
Kubernetes & Kubectl Cheat Sheet
35+ Cmds
Linux Terminal & Sysadmin Matrix
Top 50
Bash Scripting Commands & Syntax
30+ Recipes
SSH & Remote Admin Commands
25+ Recipes
Vim & Neovim Editor Commands
40+ Cmds
Regular Expressions (Regex) Cheat Sheet
35+ Patterns
Cron Job Schedule Expressions Matrix
25+ Recipes
SQL Query & Database Cheat Sheet
30+ Queries
Python 3 Programming Commands
35+ Recipes
Markdown & GFM Syntax Cheat Sheet
25+ Rules
HTTP Status Codes & Server Fixes
21 Codes
Common Network Ports & Firewall Rules
20+ Ports
Tmux Commands & Terminal Multiplexer
35+ Shortcuts
cURL CLI Recipes & API Cheat Sheet
35+ Recipes
PostgreSQL CLI (psql) & Administration
30+ Commands
Nginx Configuration & Server Snippets
25+ Configs
MongoDB & Mongosh Queries Matrix
30+ Commands
Redis CLI & In-Memory Data Store
30+ Commands
Systemd, Systemctl & Journalctl Matrix
25+ Commands
AWS CLI Cloud Infrastructure Matrix
25+ Commands
GitHub Actions Workflow & CI/CD Matrix
25+ Rules
GraphQL Query, Mutation & Schema Matrix
25+ Queries
Apache .htaccess Configuration Matrix
25+ Rules
Helm Kubernetes Package Manager Matrix
20+ Commands
Terraform & OpenTofu CLI Commands Matrix
30+ Commands
Iptables & Netfilter Firewall Commands Matrix
25+ Rules
Ansible CLI & Playbook Commands Matrix
20+ Commands
Conventional Commits & SemVer Matrix
20+ Syntax Rules
Sed & Awk Text Processing Matrix
20+ Commands
gRPC & Protocol Buffers Matrix
20+ Commands
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