All Developer Tools

📊

Kafka Partition Calculator

Calculate optimal Kafka partitions, storage requirements, and throughput estimates

🗃️

SQLite Playground

Run SQLite queries in your browser with sql.js WebAssembly. Create tables, insert data, and query

✨

CSS @starting-style Generator

Generate CSS entry animations using @starting-style. Animate from display:none with pure CSS

🔔

Webhook Tester

Test webhook payloads with custom HTTP methods, headers, and body. Debug integrations

🔑

SSH Key Generator

Generate ssh-keygen commands for ED25519, RSA, and ECDSA keys with setup instructions

🔧

Makefile Generator

Create Makefiles for C/C++, Go, Python, Node.js, Rust, and Docker projects

🐹

Go Playground

Run Go code snippets with template examples for HTTP servers, goroutines, JSON, and more

⚙️

Systemd Unit Generator

Generate systemd service unit files with restart policies, security options, and timers

⏲

Systemd Timer Generator

Generate systemd .timer + .service files and convert cron schedules to OnCalendar

📊

PromQL Builder

Build Prometheus PromQL queries with metric selectors, aggregations, functions, and presets

⏱

API Rate Limiter

Calculate rate limits with token bucket and sliding window algorithms, generate code

〰

CSS Easing Visualizer

Visualize cubic-bezier curves, compare timing functions, generate CSS animation code

👁

Regex Visualizer

Visualize and test regex patterns with match highlighting and plain-English explanations

⏰

Crontab Builder

Build cron expressions visually, see next run times, decode existing schedules

🐳

Dockerfile Builder

Build Dockerfiles visually with templates for Node.js, Python, Go, and more

⚙

Nginx Config Generator

Generate Nginx configurations visually: reverse proxy, SSL, static sites

$.

JSON Path Tester

Test JSONPath expressions against JSON data with real-time results

@kf

CSS Keyframe Animator

Visual CSS @keyframes animation builder with live preview

▭

CSS Aspect Ratio Calculator

Calculate and generate CSS aspect-ratio values with live preview

HTTP

HTTP Status Code Lookup

Searchable HTTP status code reference with descriptions

$.x

JSON Path Extractor

Query and navigate JSON data with JSONPath expressions

API

API Request Builder

Build and test HTTP requests, generate cURL/fetch/Python code

jq

JQ Playground

Online JSON query tool with JQ-like expressions

JSE

JSON Schema Editor

Build JSON Schemas visually, validate data, generate TypeScript

MDB

MongoDB Query Builder

Visual MongoDB query builder and generator

{ }

JSON Formatter

Format, validate, and beautify JSON

YML

YAML Validator

Validate, format, and convert YAML

Y→J

YAML to JSON

Convert YAML to JSON format instantly

DC+

Docker Compose Generator

Generate docker-compose.yml files with services, ports, volumes, and env vars

DC

Docker Compose Validator

Validate docker-compose.yml files

@cq

CSS Container Query Generator

Generate CSS container queries visually

TOML

TOML Validator

Validate, format, and convert TOML to JSON

S{}

JSON Schema Validator

Validate JSON data against a schema

/.*/

Regex Pattern Builder

Build and test regex patterns visually with match highlighting

🐳

Docker Run Builder

Build docker run commands visually with presets

?.*

Regex Explainer

Paste a regex and get a human-readable explanation

S{}

JSON Schema Generator

Generate JSON Schema from sample JSON data

JS

JavaScript Minifier

Minify or beautify JavaScript code

?.*

Regex Explainer

Paste a regex and get a human-readable explanation

S{}

JSON Schema Generator

Generate JSON Schema from sample JSON data

JS

JavaScript Beautifier

Format and beautify JavaScript code

SQL

SQL Formatter

Format and beautify SQL queries

SQL+

SQL Query Builder

Visual SQL query builder with joins and conditions

RDB

Redis Command Builder

Build Redis commands with interactive forms

K8s

K8s Manifest Validator

Validate Kubernetes YAML against best practices

TS

TypeScript Playground

Write, compile, and run TypeScript in your browser

⏰

Cron Expression Builder

Build and parse cron expressions with next run times

</>

HTML Beautifier

Format, indent, and minify HTML

CSS

CSS Minifier

Minify or beautify CSS code

CSS

CSS Beautifier

Format and beautify CSS code

#.

CSS Specificity Calculator

Calculate and compare CSS selector specificity

MIN

HTML Minifier

Compress and minify HTML code

SVG

SVG Optimizer

Optimize and clean SVG files to reduce size

MD

Markdown Preview

Live Markdown to HTML preview

TBL

Markdown Table Generator

Create Markdown tables visually

±

Diff Checker

Compare texts side-by-side

PY

Python Formatter

Format and beautify Python code

diff

Git Diff Viewer

Visualize and parse git diffs

A≠B

Text Compare

Compare two texts & find character-level differences

M→H

Markdown to HTML

Convert Markdown to clean HTML code

🌲

JSON Viewer

Interactive JSON tree viewer with search & paths

✓

JSON Validator

Validate JSON syntax & auto-fix common errors

XML

XML Formatter

Format, validate, & explore XML with XPath

$.x

JSON Path Finder

Find JSON paths with interactive tree view

↔

JSON Diff & Compare

Deep compare two JSON objects with path-level diffs

X←J

JSON to XML

Convert JSON data to XML format

""

JSON Stringify

Stringify & parse JSON with escape handling

🔐

JS Obfuscator

Obfuscate & deobfuscate JavaScript code

A↓

JSON Sorter

Sort JSON keys alphabetically & recursively

B64

Base64 Encode/Decode

Convert between text and Base64

%20

URL Encoder/Decoder

Encode/decode URL components

&

HTML Entity Encoder

Encode/decode HTML entities

JWT

JWT Decoder

Inspect JSON Web Tokens

JWT+

JWT Generator

Create and sign JSON Web Tokens

IMG

Image to Base64

Convert images to Base64 data URIs

B64

Base64 Image Viewer

Decode Base64 strings to images and generate code snippets

01

Text to Binary

Convert text to binary, hex, octal & decimal

B32

Base32 Encode/Decode

Convert between text and Base32 encoding

B64

Base64 File Encoder

Encode any file to Base64 and decode back

#

Hash Generator

MD5, SHA-1, SHA-256, SHA-512

ID

UUID Generator

Generate random UUIDs (v4)

Aa

Lorem Ipsum Generator

Generate placeholder text

***

Password Generator

Generate strong, secure passwords

QR

QR Code Generator

Generate QR codes for URLs and text

■

CSS Gradient Generator

Create beautiful gradients visually

META

Meta Tag Generator

Generate SEO meta tags, OG tags & Twitter cards

IMG

Placeholder Image

Generate placeholder & dummy images in any size

TBL

HTML Table Generator

Visual HTML table builder with presets & CSV import

🕑

Unix Timestamp

Convert timestamps and dates

■

Color Converter

HEX, RGB, HSL conversion

CSV

JSON to CSV

Convert between JSON and CSV formats

Y⇄J

JSON ↔ YAML Converter

Convert between JSON and YAML formats

X⇄J

XML ↔ JSON Converter

Convert between XML and JSON formats

H→M

HTML to Markdown

Convert HTML to clean Markdown syntax

JSX

HTML to JSX

Convert HTML to React JSX syntax

URL

URL Parser

Parse and analyze URL components

0x

Number Base Converter

Binary, octal, decimal, hex conversion

Aa

Text Case Converter

camelCase, snake_case, kebab-case & more

/-/

URL Slug Generator

Create SEO-friendly URL slugs from text

W#

Word Counter

Count words, characters, sentences & reading time

Dart

JSON to Dart

Generate Dart classes from JSON for Flutter

■

Hex to RGB Converter

Convert between HEX, RGB, HSL & CMYK color codes

CSV

CSV Viewer & Editor

View, edit, sort & filter CSV data in the browser

SQL

JSON to SQL

Convert JSON arrays to SQL INSERT statements

PY

JSON to Python

Convert JSON to Python dict, dataclass, or Pydantic

J⇄C

JSON ↔ CSV Converter

Bidirectional JSON and CSV conversion

C#

JSON to C#

Generate C# classes from JSON data

■

CSS Color Converter

Convert between all CSS color formats

R*

Regex Cheat Sheet

Searchable regex reference with live testing

.*

Regex Tester

Test regular expressions with live matching

.*+

Regex Debugger

Debug regex with match highlighting, explainer & code gen

?=

Regex Explainer

Understand any regex with plain English explanations

⏰

Cron Parser

Parse and explain cron expressions

⏱

Crontab Generator

Build cron expressions visually

🧙

Crontab Guru

Visual cron schedule builder with next run times

IP

IP Address Lookup

Validate IPs, calculate subnets, lookup info

🔐

SSH Tunnel Builder

Generate SSH tunneling commands: -L/-R port forwards, -D SOCKS proxy, ProxyJump, autossh

API

HTTP Request Tester

Send HTTP requests like a mini Postman

curl

cURL Command Builder

Generate curl commands with headers, JSON bodies, auth, and uploads

RWX

Chmod Calculator

Calculate Linux file permissions

URL

URL Analyzer

Parse, analyze, and compare URLs

HDR

HTTP Header Analyzer

Analyze and inspect HTTP response headers

DNS

DNS Lookup

Check DNS records for any domain online

RE

Regex Pattern Library

Common regex patterns ready to copy and use

SQL

SQL Playground

Write and run SQL queries in the browser

API

API Response Builder

Build and preview mock API responses

JS

JavaScript Playground

Run JavaScript code in a sandboxed environment

API

API Response Builder

Build and preview mock API responses

s/./

Regex Find & Replace

Find and replace text with regex patterns

⟬⟭

Flexbox Playground

Interactive CSS Flexbox layout builder

📷

Code Screenshot

Beautiful code screenshots like Carbon.sh

A#

ASCII Art Generator

Turn text into ASCII art with multiple fonts

▣

CSS Box Shadow

Visual CSS box-shadow editor with layers & presets

flex

Flexbox Playground

Visual CSS Flexbox layout generator

TS

JSON to TypeScript

Generate TypeScript interfaces from JSON

px

CSS Units Converter

Convert between px, rem, em, vh, vw units

TW

Tailwind CSS Lookup

Search Tailwind classes and see CSS output

■

Color Palette Generator

Generate harmonious color palettes with export

■

Color Palette Extractor

Extract all colors from CSS code

🖼

Image Resizer

Resize images in your browser, no upload needed

🔄

Image Converter

Convert images between PNG, JPG, WebP, GIF

FAV

Favicon Generator

Create favicons from text, emoji, or images

OCR

Image to Text (OCR)

Extract text from images with OCR

😀

Emoji Picker

Search and copy emojis with Unicode info

ASC

ASCII Table

Interactive ASCII character codes reference chart

▦

CSS Grid Generator

Visual CSS Grid layout builder with named areas

⏰

Epoch Converter

Convert Unix timestamps to dates and back

Go

JSON to Go Struct

Convert JSON to Go struct definitions

■

CSS Transform Playground

Interactive 2D/3D CSS transform builder with live preview

↻

Event Loop Visualizer

Interactive JS event loop simulator with step-by-step execution

■

CSS Animation Generator

Visual keyframe animation builder with presets

■

CSS Animation Playground

Interactive CSS animation builder with timeline

<@>

HTML Email Builder

Build responsive HTML emails with preview

■

CSS Color Name Lookup

Browse and search all 148 CSS named colors

■

CSS Animation Playground

Interactive CSS animation builder with timeline

<@>

HTML Email Builder

Build responsive HTML emails with preview

</>

HTML Live Preview

Write HTML/CSS/JS with live preview

⬟

CSS Clip-Path Generator

Create custom CSS shapes visually

▶

JavaScript Runner

Online JS code playground with console output

PDF

PDF to Text

Extract text content from PDF files

MD

Markdown Editor

Write Markdown with live preview & toolbar

🍅

Pomodoro Timer

Focus timer with work/break cycles & stats

@m

CSS Media Query Builder

Build CSS media queries with live preview

GQL

GraphQL Playground

Test GraphQL queries with schema validation

K8s

K8s YAML Generator

Generate Kubernetes manifests with templates