All Developer Tools

Free, private, browser-based. No sign-up required.

JSON Formatter

Prettify, minify, and validate JSON instantly in your browser.

Base64 Encode / Decode

Encode text to Base64 or decode Base64 back to plain text.

UUID Generator

Generate v4 UUIDs instantly — single or batch.

URL Encode / Decode

Encode or decode URL components and query strings.

Text Case Converter

Convert text to UPPER, lower, Title, camelCase, snake_case, and more.

Markdown Preview

Live Markdown editor with real-time HTML preview. Supports GFM tables, task lists, and code blocks.

Color Converter

Convert colors between HEX, RGB, and HSL formats with a live color preview.

Regex Tester

Test regular expressions in real time with match highlighting and capture group details.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.

Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Auto-detects seconds vs milliseconds.

JWT Decoder

Decode and inspect JWT header, payload, and signature. Highlights expiry status and timestamp claims.

Diff Checker

Compare two texts line by line and highlight additions and deletions. Powered by LCS algorithm.

Password Generator

Generate cryptographically secure passwords. Customize length and character sets with entropy meter.

QR Code Generator

Generate QR codes from URLs, text, Wi-Fi credentials, and more. Download as PNG.

Cron Expression Parser

Parse and explain cron expressions in plain English. Preview next 10 scheduled run times.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text instantly. Choose paragraph count and copy to clipboard.

Word & Character Counter

Count words, characters, sentences, and paragraphs. Estimate reading and speaking time.

Chmod Calculator

Calculate Linux file permissions interactively. Convert between numeric and symbolic notation.

CSV to JSON Converter

Convert CSV to JSON and JSON to CSV instantly. Handles quoted fields, auto-detects headers.

HTML Entity Encoder / Decoder

Encode and decode HTML entities. Supports named, decimal, and hex entities.

YAML to JSON Converter

Convert YAML to JSON and JSON to YAML instantly. Supports nested objects, arrays, and all YAML 1.2 features.

Line Tools

Remove duplicate lines, sort alphabetically or numerically, reverse, shuffle, and trim text lines.

Number Base Converter

Convert between binary, octal, decimal, and hex number systems.

SQL Formatter

Format, beautify, and minify SQL queries with syntax highlighting.

Aspect Ratio Calculator

Calculate and resize aspect ratios. Lock ratio and scale dimensions proportionally.

XML Formatter

Format, beautify, and minify XML documents with syntax validation.

ASCII Converter

Convert between text and ASCII codes. Supports decimal, hex, and binary representations.

TOML to JSON Converter

Convert between TOML and JSON formats instantly with validation.

Image to Base64 Converter

Convert images to Base64 strings and Data URIs. Supports PNG, JPEG, GIF, and more.

CSS to Tailwind Converter

Convert CSS properties to Tailwind utility classes instantly.

CSS Unit Converter

Convert between px, rem, em, and vw CSS units instantly. Configurable root font size and viewport width.

Markdown Table Generator

Build Markdown tables visually — add rows and columns, paste CSV or JSON, then copy the formatted table.

JSON to TypeScript Generator

Generate TypeScript interfaces from JSON. Handles nested objects, arrays, unions, and optional properties.

Fake Data Generator

Generate realistic test data: names, emails, addresses, UUIDs, and more. Export as JSON or CSV.

URL Parser

Parse any URL into its components: protocol, host, port, path, query parameters, and hash. Instant browser-native parsing.

Slugify String

Convert any text to a URL-friendly slug. Handles Unicode, removes special characters, custom separator support.

HTTP Status Codes

Searchable reference for all HTTP status codes (1xx–5xx) with descriptions and use cases.

HMAC Generator

Generate HMAC signatures using SHA-256, SHA-384, or SHA-512. Hex and Base64 output. Runs entirely in your browser.

cURL to Code Converter

Convert cURL commands to Python, JavaScript, Go, PHP, and Node.js code instantly.

JSON to Zod Schema

Generate Zod validation schemas from JSON data. Handles nested objects, arrays, and optional properties.

Docker Run to Compose

Convert docker run commands to docker-compose.yml. Supports ports, volumes, env vars, networks, and more.

RSA Key Pair Generator

Generate RSA key pairs (2048/4096-bit) in PEM or JWK format. 100% client-side — keys never leave your browser.

TOTP Generator

Generate RFC 6238 TOTP codes with live countdown. Configurable algorithm, digits, and period. Includes QR code.

JSON Diff

Compare two JSON objects and visualize differences. Outputs RFC 6902 JSON Patch and a color-coded tree diff.

Env File Parser

Parse .env files online — visualize key-value pairs, detect errors, and export to JSON. 100% client-side.

YAML Validator

Validate YAML syntax online — detailed error messages with line and column numbers, plus parsed structure preview. 100% client-side.

JSON Schema Validator

Validate JSON data against a JSON Schema online. Supports Draft-07 and Draft 2020-12. Shows error paths and detailed messages. 100% client-side.

.htaccess Generator

Generate Apache .htaccess configurations online. Force HTTPS, set caching, block directory listing, add custom redirects. 100% client-side.

Robots.txt Generator

Generate robots.txt files online. Configure user-agent rules, allow/disallow paths, and sitemap URLs. 100% client-side.

SVG to PNG Converter

Convert SVG files to PNG online. Upload or paste SVG code, choose output size and background. 100% client-side Canvas API.

WebP Converter

Convert PNG/JPG/GIF to WebP and WebP to PNG online. Batch conversion, quality control, file size comparison. 100% client-side.

CSS Variables Generator

Generate CSS custom properties from design tokens. Define colors, typography, spacing, and border radius — output ready-to-use :root variables.