Measure internet speed and bufferbloat to evaluate connection performance

Convert between a wide range of units, including distance, weight, and temperature

View sites without popups, ads or paywalls

Record your screen without having to download anything

Compare text or code files to highlight line-by-line differences

Generate realistic sample data for testing and development purposes

Convert between JSON, YAML, TOML, CSV and XML

Gather metrics like word count, readability, and sentiment from text

Measure time intervals with lap times, start, stop, and reset functions

Compare current time across different international time zones

Set countdown timers with alarm functionality

Convert timestamps between epoch time and human-readable date-time formats

Generate barcodes from text or file inputs in multiple formats

Compute checksums for files and strings using various algorithms

Create QR codes for URLs, text, and files with customization options

Inspect Unicode characters for their properties and code points

Reveal embedded EXIF metadata in digital photographs

Convert media files across various formats like MP3, MP4, WEBP, JPEG, and PNG

Enhance image quality through resolution upscaling using Deep Convolutional Networks

Perform content-preserving transformations on PDF files including linearization, encryption, and numerous other features

Optimize SVG files by removing excess markup and compressing vector data

Inspect ZIP files online and download individual files or folders

Retrieve information on Autonomous System Numbers for network analysis

Check the time taken for DNS queries from multiple global locations

Resolve domain names to IP addresses and other DNS records

Check how different DNS services resolve a domain's IP for debugging

Find Delegation Signer records to validate DNSSEC deployment

Evaluate response time for HTTP requests worldwide

Retrieve geolocation, ISP, and other details for an IP address

Identify the manufacturer based on a network interface's MAC address

Test network latency and server responsiveness across various locations

Check connectivity with STUN servers for NAT traversal

Trace network paths to destination hosts from multiple global locations

Verify server connections for media relaying via TURN

Check Websocket connections for data send/receive capabilities

Find ownership and registration details for domains and IPs

Examine regular expressions for potential Denial of Service vulnerabilities

Create test data matching regular expressions for validation and debugging

Create regular expressions matching a given set of text strings

Calculate file and directory permission values using chmod syntax

Execute and test server-side code directly in your browser

Estimate collision probability for unique identifiers like UUIDs

Interpret and validate cron schedule expressions

Run performance benchmarks on JavaScript code snippets to identify bottlenecks

Use a standalone JavaScript console for debugging without browser devtools

Compress JavaScript code to reduce file size and speed up load time

Obfuscate JavaScript code to protect logic and deter reverse engineering

Create types for Rust, Kotlin, TS and JSON schema

Visualize, format and fix malformed JSON data

Format and normalize package.json files for standardized use

Create robots.txt files to guide web crawlers

Test SQL queries in an ephemeral SQLite database

Validate syntax for programming languages like JS, TS, JSON, CSS, HTML

Create universally unique identifiers in standard forms

Identify dead pixels and repair stuck pixels on your LCD and OLED screens

Test the functionality of game controllers, joysticks, and other peripherals

Check GPU details and measure fillrate

Search for a website's SSL certificates

Verify email validity to ensure addresses are correctly formatted and active

Check if a password is in known security breaches

Create strong passwords with custom options

Generate RSA key pairs for secure data transmission and encryption

Decode encrypted text automatically, converting it back into readable format

Identify hard-coded strings from captured network packets, malware, or various other sources

Assess website compliance with accessibility standards

Check compatibility for web technologies in various browsers

Determine when a domain might become available for purchase with WHOIS data

Measure website performance metrics for speed and user experience

Inspect SSL/TLS certificate details to identify potential issues and ensure proper configuration

Identify web technologies like libraries and frameworks used on a website

Find all the subdomains for a specific website

View the currently most popular domains

View locations where outages and traffic anomalies have been observed

Manipulate colors, simulate color blindness, and create harmonies

Browse NPM package data, source code, dependencies, and versions

Transfer files between devices using encrypted WebRTC