Development & programming

Generate random license keys, serial numbers, and activation codes with customizable patterns and formats

Calculate GPU VRAM requirements for running Large Language Models with different quantization levels. Supports popular models like Llama, Mistral, and Qwen.

Create fake terminal screenshots and mockups. Customize hostname and username, type any text, and export as an image.

Extract plain text from HTML documents by removing all tags, scripts, styles, and comments

Extract and analyze all hyperlinks from HTML code with detailed information including URL, text, type, and attributes

Visualize and analyze the heading structure of HTML documents with an interactive tree view

Count and analyze HTML tags and elements. Get statistics on tag usage, frequency, and distribution.

Identify credit card type by number. Detects Visa, Mastercard, American Express, Discover, JCB, and other card brands as you type.

Identify hash types from hash strings. Supports MD5, SHA-1, SHA-256, SHA-512, bcrypt, Argon2, and many more hash algorithms.

Calculate allowed downtime based on SLA uptime percentage. Supports common SLA tiers like 99.9% (Three Nines) and 99.99% (Four Nines).

Convert text into clean, SEO-friendly URL slugs with customizable separators, case handling, and accent transliteration

Validate ABA routing numbers used in US banking. Check if an ABA routing transit number is valid.

Check if a string contains a specific substring with options for case sensitivity and minimum occurrences

Smart JSON formatter that creates human-readable output with table-like alignment, compact arrays, and comment support

Format and beautify NGINX configuration files with customizable indentation, directive alignment, and parameter wrapping

Create beautiful CSS gradients with linear, radial, and conic options. Preview live and copy the generated CSS code.

Generate Google Calendar links for adding events with title, date, time, location, and description

Generate Outlook calendar event links for easy sharing and quick event creation

Generate shareable links to add events directly to Yahoo Calendar with custom title, description, location, date, and time

Download favicon.ico from any website by entering its URL or domain name

Convert text between plain characters and Unicode formats like code points (U+XXXX), JavaScript escape sequences, HTML entities, hexadecimal, and decimal values

Interactive playground for experimenting with Moment.js date and time API - format, parse, manipulate dates with live output

Test and experiment with date-fns library functions in a live JavaScript playground with instant output

Test and experiment with RxJS reactive programming patterns, observables, and operators in real-time

Generate mailto links for email with recipient, CC, BCC, subject, and body parameters. Create clickable email links for websites and HTML documents.

Convert between Tailwind CSS colors and regular formats like HEX, RGB, HSL. Find the closest Tailwind color match for any color.

Validate Bitcoin addresses and detect address type (Legacy, SegWit, Taproot) and network (Mainnet, Testnet)

Validate Ethereum addresses and check EIP-55 checksum encoding

Generate RTSP URLs for IP cameras and video streaming with authentication, custom paths, and common device presets

Sign and unsign HTTP cookie values using HMAC-SHA256 for secure session management and data integrity verification

Check if two strings are exactly equal using strict comparison