All Developer Tools Tools
.htaccess Generator
Build a complete Apache .htaccess file visually — HTTPS, redirects, caching, and more
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 strings instantly
Color Contrast Checker
Check WCAG 2.1 contrast ratios for text and background colors to ensure accessibility compliance
Color Palette Generator
Generate beautiful color palettes from any base color with complementary, analogous, triadic, and monochromatic schemes
Color Picker & Converter
Pick any color and instantly convert between HEX, RGB, HSL, HSV, and CMYK formats with one-click copy
Cron Expression Generator
Build, parse, and test cron expressions visually — see next execution times instantly
CSS Box Shadow Generator
Design beautiful box shadows visually with live preview and instant CSS output
CSS Gradient Generator
Design beautiful linear, radial, and conic gradients visually with instant CSS and Tailwind output
Fake Data Generator
Generate realistic fake names, emails, addresses, and more for testing and development
Favicon Generator
Generate favicons from text, emoji, or shapes — preview all sizes and download as PNG or SVG
Git Commit Message Generator
Generate conventional commit messages from structured inputs instantly
HTTP Status Code Reference
Search, filter, and explore every HTTP status code with detailed explanations and fixes
Image Compressor
Compress images instantly in your browser — reduce file size without losing quality
Invisible Character Detector
Find, highlight, and remove zero-width and invisible Unicode characters from any text
JSON Formatter & Validator
Format, validate, minify, and explore JSON data with syntax highlighting and tree view
JSON-LD Schema Generator
Generate structured data markup for any schema type — paste into your page and boost SEO
JWT Decoder
Decode, inspect, and validate JSON Web Tokens instantly in your browser
Lorem Ipsum Generator
Generate placeholder text in Classic Latin, Hipster, Business, or Tech styles with word and character counts
Markdown Table Generator
Build, edit, and export markdown tables visually with live preview
Meta Tag Generator
Generate perfect HTML meta tags for SEO, Open Graph, and Twitter Cards with live previews
OG Image Generator
Design Open Graph images with live preview, download as PNG or copy the HTML/CSS code
Password Generator
Generate strong, random passwords instantly in your browser
Privacy Policy Generator
Generate a professional privacy policy for your website with GDPR and CCPA compliance clauses
QR Code Generator
Generate QR codes for URLs, text, email, phone, SMS, and vCards instantly
Regex Tester & Explainer
Test, debug, and understand regular expressions in real time with match highlighting
Robots.txt Generator
Build valid robots.txt files with CMS presets, live preview, and validation warnings
Semver Version Bumper
Parse, validate, bump, and compare semantic versions instantly
SVG Path Visualizer
Paste an SVG path d attribute to render it visually, inspect commands, control points, and bounding box
Tailwind Color Palette Generator
Enter any hex color to generate a complete Tailwind-compatible 11-shade palette with hex codes and contrast ratios
URL Slug Generator
Convert any text into clean, SEO-friendly URL slugs instantly
UUID Generator
Generate, validate, and format UUIDs v4 and v7 instantly in your browser
Developer Tools on FastTools are free, browser-based tools designed to help you get quick answers without signups or downloads. Every calculator runs entirely in your browser — your data never leaves your device.
Whether you're planning, budgeting, or just curious, these tools are built to be fast, accurate, and private. Pick any tool below to get started instantly.
Frequently Asked Questions
Are these developer tools free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.