Developer Tools

A collection of browser-based utilities for developers.

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account_tree

Mermaid Editor

Stable

Create diagrams and charts using text and code.

html

HTML Preview

Stable

Real-time HTML/CSS editor with fullscreen preview.

markdown

Markdown Editor

Stable

Write Markdown with live HTML preview.

code_blocks

React Playground

Experimental

Experiment with React components in the browser.

view_quilt

Vue Playground

Experimental

Live Vue.js component editor.

javascript

AngularJS Playground

Legacy

Legacy AngularJS (v1.x) playground.

bolt

Svelte Playground

Experimental

Experimental Svelte component viewer.

api

Swagger Editor

Experimental

Design and document APIs with OpenAPI.

terminal

Node.js Playground

Stable

Run JavaScript with console emulation.

code

TypeScript Playground

Stable

Compile and run TypeScript in the browser.

coffee

CoffeeScript Playground

Legacy

Compile and run CoffeeScript.

description

VBScript Editor

Legacy

VBScript editor with syntax highlighting and HTML preview.

qr_code_2

QR Code Generator

Stable

Generate QR codes for text, URLs, and more.

barcode

Barcode Generator

Stable

Create common 1D barcodes (CODE128, EAN-13, etc.).

view_in_ar

GLB Viewer

Experimental

Preview local .glb 3D models in the browser.

view_in_ar

GLTF Viewer

Experimental

Load and inspect .gltf models from a URL.

api

REST Client

Stable

Full-featured API testing tool like Postman

transform

Data Converter

Stable

Convert between JSON, YAML, TOML, XML formats

difference

Diff Checker

Stable

Compare text and files with advanced diff visualization

regular_expression

Regex Tester

Stable

Test regular expressions with live highlighting

key

JWT Decoder

Stable

Decode and inspect JWT tokens

calendar_today

Date Formatter

Stable

Convert dates between various formats (ISO 8601, RFC 3339, Unix, etc.)

lock_reset

Password Generator

Stable

Generate secure, random passwords and strings with custom options.

enhanced_encryption

Hash & Encryption

Stable

Compute hashes (MD5, SHA) and encrypt/decrypt text (AES, DES).

picture_as_pdf

PDF Converter

Beta

Convert Images, HTML, and Documents to PDF.

picture_as_pdf

PDF Merger

Beta

Merge multiple PDF files into a single document.

terminal

Command Helper

Stable

Generators for Cron jobs, Chmod permissions, and Tar commands.

science

Quantum Visualizer

Experimental

Interactive Quantum Circuit Simulator with Math & Physics.

calculate

Scientific Calculator

Stable

Advanced math with functions and history.

monitoring

Graphing Calculator

Stable

Plot 2D functions and visualize data.

straighten

Unit Converter

Stable

Convert Length, Mass, Volume, and more.

payments

Finance Calculator

Stable

Compound Interest, ROI, and Growth Charts.

terminal

Programmer Calculator

Stable

HEX, DEC, OCT, BIN and Bitwise Operations.