面向创作者和企业的企业级工具
Compare two texts and find differences
Count words, characters, sentences, and paragraphs in your text
Convert text between uppercase, lowercase, title case, and more
Encode and decode URLs with percent encoding
Generate SEO meta tags for your website
Generate XML sitemaps for search engines
Create robots.txt files for search engine crawlers
Analyze keyword density in your content
Preview how your links appear when shared on different social platforms
Build a spec-compliant llms.txt file — give LLMs a curated map of your site's best content
See exactly what GPTBot, ClaudeBot, PerplexityBot see on your site — robots.txt verdict + content
0-100 score on AI-era signals — llms.txt, JSON-LD, robots.txt AI rules, content depth, hreflang
Build Google-Analytics-compliant UTM tagged URLs with validation and autocomplete
Compute sample size + days-to-significance for conversion rate experiments
Encode and decode Base64 strings
Format and validate JSON data
Generate MD5, SHA1, SHA256 hashes
Generate unique identifiers (UUIDs)
Generate QR codes for URLs, text, and more
Test and debug regular expressions
Decode, inspect, and verify JSON Web Tokens — entirely in the browser
Build, test, and explain cron schedules with next-run preview
Bidirectional Markdown ↔ HTML with live preview
Bidirectional CSV ↔ JSON with auto delimiter detection and RFC 4180 quoting
Resize and compress images to WebP/JPEG/PNG in the browser
Convert Unix epoch ↔ human dates across every major time zone
Apply unified diffs or copy-patch output to an original document
Generate Code 128 and EAN-13 barcodes with SVG / PNG export
Count tokens across GPT-5, Claude 4, Gemini 2.5, Llama 4 with live cost estimation
Live pricing table for every frontier LLM — GPT, Claude, Gemini, Llama, DeepSeek, Mistral
Grade and improve your LLM system prompt — clarity, structure, token bloat, common anti-patterns
See how your text fits across every LLM's context window with a live token visualizer
Validate your Model Context Protocol manifest — required fields, tool schemas, description quality
Paste JSON, get TypeScript interfaces, Zod schemas, or JSON Schema for LLM function-calling
Convert curl commands to fetch, axios, Python requests, Go net/http, or Node.js
Convert SVG to React, React Native, Vue, or Svelte components with proper attribute conversion
Every HTTP status code — 1xx to 5xx — with RFC 9110 citations and real-world examples
Dissect any regex into a token-by-token plain-English breakdown
Pick colors and get hex, RGB, HSL values
Convert between HEX, RGB, HSL, and CMYK
Create beautiful CSS gradients
Upload one image, get all 10 favicon sizes + manifest.json + HTML snippet
Create 1200×630 Open Graph social-share images with title, subtitle, and gradient presets
Calculate your exact age in years, months, and days
Convert time between different time zones
Generate secure random passwords
Create professional invoices with advanced features
Convert length, weight, volume, area, speed, time, data, and temperature
Tip, loan, mortgage PITI, ROI/CAGR, and compound interest — all in one tool
