A Simple Toolbox for Developers, SEO, and Text Processing
Convert numbers between binary, octal, decimal, hexadecimal, and other bases. Fast and accurate.
OpenEncode text to Base64, decode Base64 strings, and convert images to Base64 format. All-in-one tool.
OpenPredict possible blood types of a child based on parents' ABO blood types. Simple and accurate.
OpenConvert text to uppercase, lowercase, title case, sentence case, and more. Quick and easy.
OpenConvert color codes between HEX, RGB, HSL, CMYK, and other formats. Quick and precise.
OpenCalculate the difference between two dates, or add/subtract days to find a future or past date.
OpenConvert text to emoji, translate emoji to text, or get emoji Unicode codes. Simple and fun.
OpenGenerate MD5, SHA1, SHA256, SHA512, and SHA3 hashes from any text. Fast and secure.
OpenConvert HTML special characters to safe entities or decode them back. Quick and reliable.
OpenBeautify, minify, encrypt, decrypt, validate, and escape JavaScript code. All-in-one toolkit.
OpenFormat, minify, validate JSON, and convert to XML or CSV. All-in-one JSON tool.
OpenDecode JSON Web Tokens to view header, payload, and signature details. Simple and fast.
OpenWrite and preview Markdown in real-time. Export to HTML. Simple and distraction-free.
OpenGenerate and preview meta tags for SEO, Open Graph, and Twitter Cards. Optimize your website visibility.
OpenCalculate percentages, percentage of a number, percent increase or decrease. Quick and accurate.
OpenCreate QR codes and various barcode formats (UPC, EAN, Code 128, etc.). Free and easy to use.
OpenGenerate random names, emails, numbers, addresses, and more. Ideal for testing and mock data.
OpenGenerate custom length random strings, passwords, and tokens. Fully customizable.
OpenTest and debug regular expressions in real-time. View matches and capture groups instantly.
OpenCompare two texts side by side, highlight differences, and find changes instantly.
OpenConvert Unix timestamps to dates, dates to timestamps, and convert between timezones easily.
OpenConvert between length, weight, temperature, speed, area, volume, and more. Quick and accurate.
OpenParse URLs to view components, encode URLs for safe transmission, or decode encoded URLs.
OpenGenerate UUID v4 and v1 unique identifiers instantly. Perfect for databases, APIs, and unique keys.
OpenCalculate the exact number of business days between two dates. Exclude weekends and add custom holidays for project scheduling and payroll.
OpenCalculate monthly loan payments, total interest, and total repayment using the equal principal and interest method. Ideal for mortgages and car loans.
OpenCompute your weighted GPA on a 4.0 scale. Add multiple courses with credits and letter grades for instant results.
OpenCalculate your exact age in years, months, and days, plus total days lived and a countdown to your next birthday.
OpenGenerate complementary, analogous, and monochromatic color palettes from any base color and export CSS custom property code.
OpenPreview system fonts like Arial, Microsoft YaHei, and PingFang SC in real-time. Customize text and size, then copy the CSS code.
OpenSet a target date and watch the real-time countdown in days, hours, minutes, and seconds. Share your timer with a custom link.
OpenCompress JPG, PNG, and WebP images in your browser. Adjust quality, preview before and after, and download — no upload required.
OpenConvert images between PNG, JPEG, WebP, and BMP formats instantly. Handles transparent backgrounds. No server upload needed.
OpenCrop images with free-form or fixed aspect ratios (1:1, 4:3, 16:9) and resize to custom dimensions. Runs entirely in your browser.
OpenCombine multiple PDF files into one document in the correct order. All processing is done locally — files are never uploaded to a server.
OpenConvert PDF pages to PNG or JPEG images. Export a single page or batch-export all pages as a ZIP file. No upload required.
OpenInstantly extract video metadata: duration, resolution, estimated bitrate, file size, and format. Powered by the HTML5 Video API — runs locally.
OpenLook up any IP address to find its country, city, coordinates, timezone, and ISP. Auto-detects your own public IP on load.
OpenCount tokens and visualize tokenization using GPT-4 / GPT-3.5 cl100k_base rules. Each token is color-coded for easy analysis.
OpenType an indented outline and instantly generate a visual mind map. Export as SVG or PNG. No upload, no account required.
OpenEnter tasks with start and end dates to generate an interactive project timeline. Export as PNG. Powered by Apache ECharts.
OpenInspect HTTP response headers for any URL — server type, content-type, security headers, cache-control, and more. Server-side proxy included.
OpenCheck domain registration info — registrar, creation date, expiry date, name servers, and status — using the modern RDAP protocol.
OpenCreate bar, line, pie, and scatter charts from your data. Powered by Apache ECharts. Export as PNG. No data uploaded.
OpenQuery A, AAAA, MX, TXT, CNAME, NS and SOA records for any domain using Cloudflare DNS-over-HTTPS. Free, instant, and privacy-friendly.
OpenParse and explain cron expressions in plain English. View the next 5 scheduled run times. Supports all standard cron special characters.
OpenConvert JSON arrays to CSV and CSV back to JSON instantly. RFC 4180 compliant quoting. No server upload — all processing runs in your browser.
OpenVisually design linear, radial, and conic CSS gradients with a live preview. Add unlimited color stops, adjust angle and positions, then copy the ready-to-use CSS property.
OpenCalculate your Body Mass Index for metric (kg/cm) or imperial (lb/ft) units. Instantly see your BMI value, category, and position on a color-coded health scale.
OpenGet your personalized daily horoscope for all 12 zodiac signs. Updated every day.
OpenDraw a tarot card and get an instant reading. 78 major and minor arcana cards.
OpenFind your Chinese zodiac animal by birth year and discover your personality traits.
OpenCalculate your life path number from your name or birthday and unlock its meaning.
OpenEnter a dream keyword and explore its symbolic meaning from various traditions.
OpenGenerate your Chinese BaZi (Four Pillars of Destiny) chart from your birth date and time.
OpenGenerate authentic Chinese names for any gender, with meaning and pronunciation.
OpenDiscover important historical events that happened on this day throughout history.
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