DNS

DNS Lookup

Look up DNS records for any domain. A, AAAA, PTR records with reverse DNS resolution.

SSL

SSL Certificate Checker

Check SSL/TLS certificates. Verify validity, issuer, expiry, SAN domains, and cipher strength.

HDR

HTTP Header Checker

Inspect HTTP response headers. Check security headers, caching policies, and server configuration.

WH

WHOIS LookupNew

Look up domain registration details. Registrar, creation date, expiry, nameservers, and raw WHOIS data.

3xx

Redirect CheckerNew

Trace HTTP redirect chains. See every hop, status code, and the final destination URL.

IP4

Subnet CalculatorNew

Calculate network ranges from CIDR notation. Subnet mask, broadcast, first/last host, IP class.

API

API TesterNew

Test REST APIs from your browser. Custom headers, request body, response inspection, and history.

UP?

Website Status CheckerNew

Check if any website is up or down. See response time, status code, server info, and IP address.

@

Email ValidatorNew

Validate email addresses. Check syntax, verify MX records, and confirm the domain can receive mail.

TEC

Tech Stack DetectorNew

Detect technologies used by any website. Frameworks, CMS, CDN, analytics, and security headers.

JS

JSON Schema ValidatorNew

Validate JSON data against a JSON Schema. Supports type checking, required fields, patterns, and more.

IP

What Is My IPNew

Check your IP address, browser, screen resolution, timezone, and full device details instantly.

H2M

HTML to MarkdownNew

Convert HTML to Markdown and back. Supports tables, code blocks, lists, and nested elements.

0x

Base ConverterNew

Convert numbers between binary, hex, octal, and decimal. BigInt support for large numbers.

AA

Contrast CheckerNew

Check WCAG 2.1 color contrast ratio. Test AA and AAA compliance for text accessibility.

IMG

Image Compressor

Compress JPEG, PNG, WebP images. Resize, adjust quality, batch processing. All client-side.

F

Flexbox Generator

Visual CSS Flexbox playground. Build layouts with presets, customize all properties, copy CSS.

SEO

Meta Tag Generator

Generate SEO meta tags, Open Graph, and Twitter Cards. Preview Google and social media appearance.

HTTP

HTTP Status Codes

Complete HTTP status code reference. Search, filter by category, detailed explanations and fixes.

Wc

Word CounterNew

Count words, characters, sentences, paragraphs. Reading time and text statistics.

Aa

Text Case ConverterNew

Convert text between UPPERCASE, lowercase, camelCase, snake_case, kebab-case & more.

{ }

JSON Formatter & Validator

Format, validate, and minify JSON. Syntax highlighting and error detection.

SQL

SQL Formatter

Format and beautify SQL queries. Auto-uppercase keywords, indent subqueries.

YML

YAML ↔ JSON Converter

Convert between YAML and JSON formats instantly. Validate and format.

CSV

JSON ↔ CSV ConverterNew

Convert between JSON and CSV formats. Handles nested objects, download results.

MD

Markdown Preview

Write Markdown and see the rendered output in real-time.

Min

CSS & JS Minifier

Minify CSS and JavaScript to reduce file size. See compression stats.

B64

Base64 Encode / Decode

Encode and decode Base64 strings. Supports text and file input.

JWT

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and expiration.

%

URL Encode / Decode

Encode and decode URL components. Handle special characters safely.

&

HTML Entity Encoder

Encode and decode HTML entities. Named, numeric, and hex modes.

\\

String Escape / Unescape

Escape strings for JSON, Java, Python, SQL, Shell, XML, CSV, and Unicode.

#

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any input.

.*

Regex Tester

Test regular expressions with real-time matching and capture group display.

@

Cron Expression Generator

Build and parse cron expressions visually. See next run times instantly.

ID

UUID Generator

Generate random UUID v4 identifiers. Bulk generate up to 100 at once.

***

Password Generator

Generate strong random passwords. Customize length, characters, see entropy.

QR

QR Code Generator

Generate QR codes from any text or URL. Customize colors, size, error correction.

T

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Live clock.

C

Color Converter

Convert between HEX, RGB, HSL, and CSS color formats instantly.

P

Color Palette GeneratorNew

Generate harmonious color palettes. Complementary, analogous, triadic schemes. Export to CSS.

<>

Text Diff

Compare two texts side by side. Highlight additions, deletions, and changes.

Li

Lorem Ipsum Generator

Generate placeholder text. Choose paragraphs, sentences, or words.

G

CSS Gradient Generator

Create beautiful linear, radial, and conic gradients visually. Copy CSS instantly.

S

Box Shadow Generator

Design CSS box-shadow effects with live preview. Presets and full customization.

7

Chmod Calculator

Calculate Unix file permissions visually. Convert between symbolic and numeric notation.

IMG

Image to Base64

Convert images to Base64 strings. Get data URI, CSS background, and HTML embed code.

BOT

Robots.txt GeneratorNew

Generate robots.txt files visually. Block AI bots, set crawl rules, add sitemaps. Presets included.

$.

JSONPath EvaluatorNew

Test JSONPath expressions against JSON data. Real-time evaluation with cheatsheet.

MD

Markdown Table GeneratorNew

Build Markdown tables visually. Add rows/columns, set alignment, import CSV. Copy output.

GR

CSS Grid GeneratorNew

Visual CSS Grid layout builder. Define rows, columns, gaps. Presets for common layouts. Copy CSS.

FV

Favicon GeneratorNew

Create favicons from text or emoji. Download as ICO, PNG, SVG. Generate HTML link tags.

.ht

.htaccess GeneratorNew

Build Apache .htaccess files visually. HTTPS redirect, caching, security headers, rewrites.

BR

Border Radius GeneratorNew

Visual CSS border-radius builder. Control each corner independently. Presets and live preview.

PH

Placeholder ImageNew

Generate placeholder images with custom dimensions, colors, and text. Download as PNG, JPEG, SVG.

16:9

Aspect Ratio CalculatorNew

Calculate aspect ratios, resize dimensions proportionally. Common screen and video resolution presets.

OG

OG PreviewNew

Preview Open Graph and Twitter Card meta tags. See how links appear on social media.

01

Text to BinaryNew

Convert text to binary and back. See ASCII codes, hex, octal for each character.

SVG

SVG OptimizerNew

Optimize and minify SVG files. Remove metadata, comments, hidden elements. See bytes saved.

AN

CSS Animation GeneratorNew

Build CSS keyframe animations visually. Presets, timing controls, live preview. Copy CSS.

JW+

JWT BuilderNew

Generate signed JSON Web Tokens. Custom claims, expiration, HMAC signing. Verify signatures.

TML

TOML ↔ JSONNew

Convert between TOML and JSON formats. Real-time conversion with error highlighting.

CT

Crontab TesterNew

Test and explain cron expressions. See next execution times, calendar view, validation.

CSV

CSV ViewerNew

View and edit CSV/TSV files. Sort columns, filter rows, column stats. Auto-detect delimiters.

CB

Color Blindness SimNew

Simulate color blindness types. See how colors appear for protanopia, deuteranopia, tritanopia.

NGX

Nginx Config GeneratorNew

Build nginx.conf visually. Reverse proxy, SSL, gzip, security headers. Presets included.

DC

Docker Compose GenNew

Generate docker-compose.yml visually. Add services, ports, volumes, networks. Common presets.

TS

JSON to TypeScriptNew

Generate TypeScript interfaces from JSON data. Handle nested objects, arrays, optional fields.

.env

.env File EditorNew

Edit .env files as a table. Convert between .env, JSON, YAML. Generate .env.example.

GIT

Git CheatsheetNew

Interactive Git command reference. 50+ commands, search, categories, common workflows.

HTM

HTML FormatterNew

Format and prettify HTML code. Custom indentation, minify option, size comparison.

A#

ASCII Art GeneratorNew

Convert text to ASCII art. Multiple font styles, live preview. Great for READMEs and comments.

px

CSS Units ConverterNew

Convert between px, rem, em, vw, vh, pt, cm. Configurable base font size and viewport.

MDB

SQL to MongoDBNew

Convert SQL queries to MongoDB syntax. SELECT to find(), WHERE to match, GROUP BY to aggregate.

TW

Tailwind CSS LookupNew

Searchable Tailwind CSS class reference. 100+ utilities with CSS output and visual previews.

J<>

JSON DiffNew

Deep-compare two JSON objects. See added, removed, changed keys. Export as JSON Patch.

SSH

SSH Key GeneratorNew

Generate SSH key pairs (RSA, Ed25519) in your browser. Download keys, copy fingerprint.

J→Y

JSON to YAMLNew

Convert JSON to YAML and back. Real-time conversion, validation, configurable output.

VPC

Visual Subnet PlannerNew

Visually split and plan IP ranges. Interactive subnet tree, color-coded blocks, export plan.

:)

Emoji PickerNew

Search 500+ emojis by name. Copy as character, HTML entity, CSS code, or JavaScript escape.

R.*

Regex CheatsheetNew

80+ regex patterns with examples. Character classes, quantifiers, lookaround, common patterns.

CP

Color PickerNew

Full color picker with HEX, RGB, HSL, HSV, CMYK output. 140+ named CSS colors, history.

B58

Base58/62 EncoderNew

Encode and decode Base58 (Bitcoin) and Base62 (short URLs). Character distribution stats.

CP

CSS Clip-PathNew

Visual clip-path editor. Drag points, pick shapes. Presets: star, hexagon, arrow, heart.

GH

GitHub Profile GenNew

Generate a GitHub profile README. Skills, stats, social links. Multiple templates.

{T}

JSON Tree ViewerNew

Interactive JSON tree explorer. Collapsible nodes, type coloring, path copying, search.

Ts

Text Shadow GeneratorNew

CSS text-shadow builder with multiple layers. Neon glow, 3D, letterpress presets. Copy CSS.

IP+

IP Address ConverterNew

Convert IPv4 between decimal, binary, hex, octal, integer. IPv4↔IPv6 mapping.

KB

Keyboard ShortcutsNew

150+ shortcuts for VS Code, Terminal, Chrome DevTools, macOS, Windows, Vim, Git. Searchable.

cURL

cURL to CodeNew

Convert cURL commands to Python, JavaScript, Go, PHP, Ruby, Node.js code. Parse all flags.

CLR

HTML Color NamesNew

All 147 CSS named colors with hex, RGB, swatches. Search, sort by hue, group by family.

d:

Data URL GeneratorNew

Convert files to data: URIs. Auto-detect MIME type, preview images, size comparison.

HM

HMAC GeneratorNew

Generate HMAC with SHA-256, SHA-384, SHA-512. Enter message and secret key. Hex or Base64.

SQL+

SQL CheatsheetNew

60+ SQL commands and patterns. SELECT, JOIN, GROUP BY, subqueries, functions. Searchable.

FX

CSS Filter GeneratorNew

Apply CSS filter effects visually. Blur, contrast, sepia, grayscale. Presets and live preview.

Ff

Font PreviewNew

Preview and compare 30+ Google Fonts. Adjust size, weight, spacing. Copy CSS import code.

GET

HTTP MethodsNew

All 9 HTTP methods explained. Idempotent, safe, body support. Code examples for each.

J→S

JSON to SchemaNew

Generate JSON Schema from JSON data. Detect types, required fields. Draft 4/7/2020-12.

PWA

Manifest GeneratorNew

Create manifest.json for PWAs. Icons, theme colors, display mode. PWA checklist included.

v1

Semver Calculator

Parse, compare, and test semantic versions. NPM range checker (^, ~, >=). Next version calculator.

</>

XML FormatterNew

Format, validate, and minify XML with syntax highlighting. Error detection with line numbers.

M→H

Markdown to HTMLNew

Convert Markdown to HTML with live preview. Supports GFM: tables, task lists, code blocks.

0,1,2

CSS SpecificityNew

Calculate CSS selector specificity. Visual breakdown of IDs, classes, and elements with sorting.

UTF

Encoding ConverterNew

Convert text between encodings (UTF-8, ASCII, Latin-1). Unicode inspector, hex dump, byte counter.

:80

Network PortsNew

Searchable reference of 100+ common network ports. TCP/UDP, security ratings, category filters.

Developer Tools That Just Work