Tools
Free Developer Tools
Powerful tools for email deliverability, image optimization, and development. No watermarks, no limits. All processing happens locally in your browser.
Developer Tools
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting
JWT Debugger
Decode and inspect JSON Web Tokens, check expiration and claims
UUID Generator
Generate UUIDs (v4 and v7) and validate existing identifiers
Base64 Encoder/Decoder
Encode and decode Base64 strings, supports URL-safe variant
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes
Password Generator
Create strong, cryptographically secure random passwords
QR Code Generator
Generate QR codes for URLs, WiFi, vCards, and more
Cron Expression Generator
Create cron expressions for scheduled tasks with visual builder
Regex Tester
Test regular expressions with real-time matching and highlighting
Timestamp Converter
Convert between Unix timestamps and human-readable dates
Markdown Preview
Live markdown editor with real-time preview and syntax guide
HTML to Markdown
Convert HTML to clean Markdown format for documentation
CSV to JSON
Convert CSV data to JSON with customizable formatting
URL Parser & Decoder
Parse URLs and extract query parameters with encoding/decoding
Diff Checker
Compare two texts side-by-side with line-by-line diff highlighting
SQL Formatter
Format, beautify, and minify SQL queries with syntax highlighting
Robots.txt Generator
Generate and test robots.txt files with visual builder and presets
Meta Tag Generator
Generate meta tags with live Google, Facebook, and Twitter previews
Color Converter
Convert between HEX, RGB, HSL with contrast checker and harmonies
AI & API Tools
Token Counter
Count tokens and estimate costs for GPT-4o, Claude, and more
Prompt Playground
Write prompts with variable interpolation, templates, and cost estimates
JSON Schema Generator
Generate JSON Schema from sample JSON with format detection
Webhook Tester
Verify webhook signatures, pretty-print payloads, and explore templates
YAML/JSON Converter
Convert between YAML and JSON formats with auto-detection
HTTP Status Codes
Interactive reference for all HTTP status codes with examples
Email Tools
Email Auth Checker
Check SPF, DKIM, and DMARC records for any domain
DNS Record Generator
Generate SPF, DKIM, DMARC, and MX records for email authentication
Email Header Analyzer
Analyze email headers to debug delivery issues and authentication
Email Template Tester
Preview and test HTML email templates in desktop and mobile views
Image Tools
Image Compressor
Compress images without losing quality. Supports PNG, JPEG, WebP
WebP Converter
Convert PNG, JPEG, GIF to WebP format for faster loading
OG Image Generator
Create beautiful Open Graph images for social media sharing
Screenshot from URL
Capture webpage screenshots with customizable viewports and formats
SVG Optimizer
Optimize SVG files by removing metadata, comments, and whitespace
SSL Certificate Checker
Check HTTPS connectivity and troubleshoot SSL certificate issues
Video Tools
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