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Web Tools Calculate network address ranges, broadcast IPs, netmasks, and usable host counts from CIDR blocks. Web Tools Generate Apache basic auth credentials and common redirect rules (Enforce HTTPS, Remove www, 301 Redirects). Web Tools Quick interactive lookup for standard network ports, transport protocols (TCP/UDP), and services. Developer Format, beautify, and minify SQL queries for MySQL, PostgreSQL, SQLite, and MS SQL Server online. Developer Compress HTML and CSS payload sizes or format minified code cleanly online. Developer Minify JS and TS code payloads or un-minify obfuscated scripts online. Developer Convert configuration files bi-directionally between YAML and JSON formats online. Developer Convert Markdown text to HTML code with live visual preview online. Developer Convert images to Base64 Data URIs or decode Base64 strings back to downloadable images online. Developer Format, prettify, and validate GraphQL queries, mutations, and schemas online. 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Finance Create simple invoices for freelance work, services, and small businesses. Developer Format and validate JSON online with a clean, free developer-friendly interface. Developer Decode JWT headers, payloads, and signatures to inspect authentication tokens safely. SEO Check keyword density in content to improve SEO relevance and readability. Finance Estimate loan EMIs, total interest, and repayment totals for better budgeting. Finance Convert between land measurement units like aana, ropani, bigha, kattha, and square feet. Web Tools Create HTML search engine meta tags (title, description, keywords, robots) for your pages. SEO Preview Open Graph tags and social share cards for Facebook, LinkedIn, and X. Finance Estimate salary, deductions, and take-home pay for payroll planning. Finance Calculate profit, margin, and markup percentages for pricing and business planning. QR & Barcode Generate custom QR codes for URLs, text, and simple messages with styling choices. QR & Barcode Scan and decode QR codes instantly using your camera or by uploading an image. QR & Barcode Generate WiFi QR codes to share network names and passwords securely. QR & Barcode Generate QR codes to initiate emails with pre-filled subject and body. QR & Barcode Generate QR codes to send pre-defined text messages to specific phone numbers. QR & Barcode Generate contact information vCard QR codes for quick scans. QR & Barcode Generate standard barcodes including CODE128, CODE39, EAN-13, and UPC. QR & Barcode Scan and read barcodes from images or live camera streams in your browser. Developer Test regular expressions against sample text and inspect matching results instantly. Web Tools Generate standard robots.txt files with crawl directives and sitemap locations. Web Tools Generate clean, valid XML sitemaps from a list of page URLs for search engines. Text Tools Generate clean, SEO-friendly URL slugs from titles, names, and phrases. Creative Create short, catchy thumbnail text ideas for YouTube and digital content. Marketing Create campaign URLs with UTM parameters for analytics and marketing tracking. Developer Generate version 4 UUIDs for databases, APIs, and system identifiers. Creative Create catchy YouTube title ideas for videos, tutorials, and channel content. Security Generate secure, random passwords with customizable length, symbols, and character sets client-side. Security Generate custom API keys with custom prefixes, lengths, and secure random byte formats. Security Generate secure random CSRF tokens for web forms and API endpoints. Security Generate cryptographically secure random tokens for sessions, passwords, and identifiers. Security Generate single or batch RFC 4122 version 4 UUIDs with formatting and casing options. Security Generate RSA public and private key pairs in PEM format client-side using Web Cryptography API. Security Encrypt plaintext securely using AES (GCM/CBC) algorithms directly in your browser. Security Decrypt AES-encrypted ciphertext using a passcode and initialization vector (IV) client-side. Security Decode and validate JSON Web Tokens (JWT) to check header details, payload claims, and signature validity. Security Analyze and identify unknown cryptographic hash formats such as MD5, SHA-1, SHA-256, and bcrypt. Web Tools Parse any URL string client-side to extract the protocol, host, port, path, query parameters, and hash. Web Tools Shorten long URLs quickly and safely using public url shortening API integration. Web Tools Build campaign URLs with custom UTM parameters (source, medium, campaign name) for tracking. Web Tools Generate Open Graph meta tags to customize social share appearances on Facebook and LinkedIn. Web Tools Generate Twitter Card HTML meta tags to optimize your site share cards on X. Web Tools Inspect web page source code to identify and check its canonical URL tags. Web Tools Trace HTTP redirect paths (301, 302, etc.) of any URL and view intermediate hops. Web Tools Query standard DNS records (A, AAAA, MX, TXT, CNAME, NS) for any domain name. Web Tools Query raw domain registration records and registrar contact information via WHOIS protocol. Web Tools Analyze a domain SSL/TLS certificate to extract validity dates, issuing authorities, and security states. Web Tools Geolocate any IP address or domain to get city, country, coordinates, and ISP details. Web Tools Parse and inspect user agent strings to extract browser, operating system, and device details. Web Tools Inspect raw HTTP response headers of any URL and run security header validation. Web Tools Test latency and connection response times to any web host via TCP handshake measurements. Unit Converters Convert between length and distance units such as meters, kilometers, miles, feet, and inches. Unit Converters Convert between weight and mass units such as kilograms, grams, pounds, ounces, and stones. Unit Converters Convert between temperature units such as Celsius, Fahrenheit, and Kelvin in real-time. Unit Converters Convert between area units such as square meters, square miles, acres, and hectares. Unit Converters Convert between volume and liquid capacity units such as liters, gallons, and cubic meters. Unit Converters Convert between speed and velocity units such as mph, km/h, knots, and meters per second. Unit Converters Convert between pressure units such as pascals, bar, psi, atmosphere, and mmHg. Unit Converters Convert between energy and work units such as joules, calories, and kilowatt-hours. Unit Converters Convert between fuel efficiency units such as MPG, L/100km, and kilometers per liter. Unit Converters Convert between angular measurement units such as degrees, radians, and gradians. 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Color Tools Convert HEX color values to RGB or RGBA notations online. Color Tools Convert RGB or RGBA color values to standard hexadecimal strings. Color Tools Translate hexadecimal colors to HSL parameters (hue, saturation, lightness). Color Tools Convert HSL parameter coordinates back to standard HEX colors. Color Tools Generate harmonized color palettes based on monochromatic, triadic, or analogous relationships. Color Tools Design linear and radial gradients with customizable stops and CSS outputs. Color Tools Create advanced CSS background gradients with customizable positions and stops. Color Tools Audit foreground/background color combinations against WCAG 2.1 accessibility benchmarks. Color Tools Simulate how colors and uploaded images appear under different color vision deficiencies. Color Tools Generate standard Tailwind CSS color scales (50 to 955) from a single custom color. Password Tools Generate secure, cryptographically random passwords with custom parameters. Password Tools Assess password security, entropy, and estimate crack times using zxcvbn. Password Tools Simultaneously generate MD5, SHA-1, SHA-256, SHA-512, and bcrypt hashes. Password Tools Generate MD5 checksum hashes for strings and payloads. Password Tools Generate SHA-1 cryptographic hashes for verification checkups. Password Tools Generate secure SHA-256 checksum strings client-side. Password Tools Generate high-entropy SHA-512 hashes online. Password Tools Create bcrypt hashes using customizable salt rounds. Password Tools Compare two hash strings or verify a plaintext string against a hash. Password Tools Generate lists of secure random strings with customizable alphabet sets. Text Tools Count words, characters, sentences, paragraphs, read time, and character densities. Text Tools Count character lengths with and without spaces. Text Tools Count sentence occurrences in text blocks. Text Tools Count paragraph blocks in text bodies. 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Text Tools Reverse word order coordinates inside sentences.

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Custom QR Code Generator Studio

Create highly customizable, scannable QR codes for URLs, WiFi auto-connect, vCard contacts, Email, and SMS with custom logos and vector SVG export.

Free Online Custom QR Code Generator

Generate scannable QR codes for websites, WiFi networks, digital business cards (vCard), emails, and phone numbers. Customize module shapes (Square, Rounded, Circles), foreground and background colors, center logo overlays, and export high-resolution PNG or vector SVG files 100% inside your browser.

Ready to generate.

Why Use Custom QR Codes for Business?

QR codes bridge physical marketing collateral (business cards, product packaging, flyers, restaurant menus) with digital actions. Creating branded QR codes with custom colors and center logo overlays increases scan rates by up to 30%.

How to use it

  1. Select a QR code category (URL, WiFi, vCard, Email, SMS).
  2. Enter the corresponding information (e.g. WiFi SSID and Password).
  3. Customize Foreground/Background colors, Module Shape (Square vs Rounded Dots), and upload a Center Logo.
  4. Click ⚡ Generate QR Code and download as high-res PNG or vector SVG.

Frequently Asked Questions (FAQ)

Do these QR codes expire?

No. All generated static QR codes are permanent and will never expire because the destination data is encoded directly into the QR pattern.

Why does embedding a logo require High Error Correction (Level H)?

Center logos obscure a small portion of the QR code matrix. Level H error correction adds 30% data redundancy, ensuring scanners read the QR code accurately.

SEO & Web Development Applications

Using clean, validated developer and content utilities ensures your web pages load fast, execute cleanly, and follow technical web standards—all key factors for search engine indexing and user experience.

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