Developer Tools

Tools for developers and programmers

Cron Expression Builder

Build and test cron expressions with visual scheduler

JWT Decoder

Decode and inspect JWT tokens safely in your browser

QR Code Generator

Generate QR codes for text, URLs, WiFi, and more

DNS Lookup

Query DNS records including A, MX, NS, TXT, and more

CSS Gradient Generator

Create beautiful CSS gradients with visual editor

Regex Tester

Test and debug regular expressions with real-time matching

UUID Generator & Validator

Generate UUIDs (v1, v4, v5) and validate existing UUIDs. Bulk generate, custom namespaces, and multiple formats.

Timestamp Converter

Convert timestamps to human-readable dates and vice versa. Support for Unix, JavaScript timestamps, and multiple date formats.

URL Encoder Decoder

URL encode and decode text online. Convert special characters to URL-safe format. Support for JavaScript, percent encoding, and query parameters.

HTML Entity Encoder Decoder

Encode and decode HTML entities online. Convert special characters to HTML entities like < > &. Support for named and numeric entities.

Cloud Cost Analyzer

Analyze and optimize cloud costs across AWS, GCP, Azure

Scientific Calculator

Full-featured scientific calculator with trigonometry, logarithms, powers, and memory functions.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal instantly. Supports any base from 2 to 36.

Unit Converter

Convert between hundreds of units across 9 categories: length, weight, temperature, volume, speed, area, data storage, pressure, and energy. Free, instant, accurate.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files instantly in your browser.

Aspect Ratio Calculator

Calculate aspect ratios from dimensions, find missing dimensions, and convert between common ratios like 16:9, 4:3, 1:1.

Code Minifier

Minify JavaScript, CSS, and HTML code online. Reduce file size by removing whitespace and comments.

Barcode Generator

Generate Code 39 and Code 128 barcodes online. Download as PNG. Free, no signup required.

Cron Next-Run Viewer

See the next scheduled run times for any cron expression with human-readable descriptions and timezone support.