Is This Website Down
Check whether a public URL responds from Cloudflare, with status and response time.
Network & DNSOpen toolEvery utility you need, instant and private.
- No tracking cookies
- Browser tools run on this device
- Network checks are not stored
- Free to use
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Showing 59 / 59 tools
What Is My IP
Show the visitor public IP from CF-Connecting-IP. Nothing is stored.
Network & DNSOpen toolIP Geolocation
Approximate country, city, and network for this connection. Not a pasted-IP lookup.
Network & DNSOpen toolDNS Lookup
Look up A, AAAA, MX, TXT, NS and CNAME records via DNS over HTTPS.
Network & DNSOpen toolWhois Lookup
Registrar, nameservers and expiry for a domain, from RDAP.
Network & DNSOpen toolSSL Expiry Checker
Read the TLS certificate on a public host and show issuer, expiry, and days left.
Network & DNSOpen toolHTTP Status Codes
Explain a status code, from 200 OK to 503 Service Unavailable.
Network & DNSOpen toolHTTP Headers
Fetch the response headers for a public URL.
Network & DNSOpen toolRedirect Checker
List each redirect hop, status and location.
Network & DNSOpen toolPort Check
Check one public TCP port. A timeout is not proof it is closed. Not a scanner.
Network & DNSOpen toolUser-Agent Parser
Split a user-agent string into browser, version and operating system.
Network & DNSOpen toolCIDR Calculator
Network, broadcast, usable range and netmask for an IPv4 CIDR.
Network & DNSOpen toolUnix Timestamp Converter
Convert epoch seconds or milliseconds to a date, and back.
Time & RandomOpen toolCron Parser
Read a five-field cron expression in plain English.
Formatters & CodeOpen toolUUID Generator
Generate version 4 UUIDs in the browser.
Security & CryptoOpen toolPassword Generator
Generate a random password locally. It is not sent or saved.
Security & CryptoOpen toolPassword Strength
Score a password in the page. It never leaves the browser.
Security & CryptoOpen toolBase64 Encode and Decode
Encode or decode Base64, including Unicode.
Security & CryptoOpen toolURL Encoder
Encode or decode a URL component.
Security & CryptoOpen toolHTML Escape
Escape or unescape HTML special characters.
Formatters & CodeOpen toolHash Generator
SHA-256 a string in the browser.
Security & CryptoOpen toolJSON Formatter
Format, validate and minify JSON.
Formatters & CodeOpen toolXML Formatter
Format XML and show parse errors.
Formatters & CodeOpen toolJWT Decoder
Decode a JWT header and payload. The signature is not verified.
Security & CryptoOpen toolRegex Tester
Test a JavaScript regular expression against sample text.
Formatters & CodeOpen toolText Diff
Compare two pasted texts line by line.
Text & StringOpen toolWord Counter
Count words, characters and lines as you type.
Text & StringOpen toolCase Converter
Convert text to upper, lower, title or sentence case.
Text & StringOpen toolSlug Generator
Turn a title into a lowercase hyphenated slug.
Text & StringOpen toolLorem Ipsum Generator
Generate placeholder paragraphs.
Text & StringOpen toolRemove Duplicate Lines
Drop duplicate lines and keep the first occurrence.
Text & StringOpen toolSort Lines
Sort pasted lines A to Z or Z to A.
Text & StringOpen toolFind and Replace
Find and replace in pasted text.
Text & StringOpen toolEmail Validator
Check email syntax only. It does not verify the mailbox.
Media & DesignOpen toolQR Code Generator
Make a QR code from text or a URL and download the PNG.
Media & DesignOpen toolBarcode Generator
Generate a Code 128 barcode and download it.
Media & DesignOpen toolHex to RGB
Convert colours between hex, RGB and HSL.
Media & DesignOpen toolContrast Checker
WCAG contrast ratio for two colours.
Media & DesignOpen toolFavicon Generator
Draw a letter favicon and download a PNG.
Media & DesignOpen toolOpen Graph Generator
Build title, description and Open Graph tags.
Media & DesignOpen toolRobots.txt Generator
Generate a robots.txt for allow, disallow and sitemap.
Formatters & CodeOpen toolhtaccess Redirect Generator
Emit one Apache redirect rule.
Formatters & CodeOpen toolPercentage Calculator
Percent of a number, a ratio, or a percent change.
CalculatorsOpen toolTip Calculator
Work out a tip and split the bill.
CalculatorsOpen toolAge Calculator
Age in years, months and days from a date of birth.
CalculatorsOpen toolDate Difference
Count the days between two dates.
CalculatorsOpen toolBMI Calculator
Body mass index from height and weight. Not a diagnosis.
CalculatorsOpen toolLoan Payment Calculator
Fixed monthly payment and total interest. Fees excluded.
CalculatorsOpen toolUnit Converter
Convert length, weight and temperature.
CalculatorsOpen toolTime Zone Converter
Convert a time between IANA time zones.
Time & RandomOpen toolEpoch Now
Current Unix time in seconds and milliseconds.
Time & RandomOpen toolCountdown
Count down to a date and time.
Time & RandomOpen toolRandom Number
A random integer between two values, inclusive.
Time & RandomOpen toolDice Roller
Roll dice in the browser and show each face.
Time & RandomOpen toolCoin Flip
Flip a fair coin.
Time & RandomOpen toolYes or No
Answer yes or no at random.
Time & RandomOpen toolMIME Type Lookup
MIME type for a file extension.
Media & DesignOpen toolBytes Converter
Convert bytes, KB, MB and GB, binary or decimal.
CalculatorsOpen toolAspect Ratio Calculator
Simplify a width and height, or find the missing side.
Media & DesignOpen toolNo tools match those filters.