Free tools for
developers & the web.

Network diagnostics, security audits, developer utilities and more — all free, no sign-up, no tracking. Everything runs instantly in your browser.

Free to use · No account required · Works instantly · Browser-only — no data sent
Network
🌐
My IP & Privacy Audit
LIVE
See your public IP, location, ISP, DNS leak status, and browser fingerprint. Get a privacy score with a fix guide.
IP lookup DNS leak WebRTC Privacy score
Check my IP now
🛡️
VPN & Proxy Check
LIVE
Is your VPN actually working? Detect VPN, proxy and Tor usage — and see exactly what websites know about you.
VPN detect Proxy check Tor Anonymity
Check my anonymity
🔎
WHOIS Lookup
LIVE
Look up any domain — registrar, creation date, expiry, nameservers and DNSSEC status in seconds.
Registrar Expiry Nameservers Domain age
Look up a domain
🔐
SSL Certificate Checker
LIVE
Check any website's SSL certificate — validity, expiry date, issuer, security grade and HSTS status.
SSL grade Expiry HSTS TLS
Check SSL certificate
📡
Website Down Checker
LIVE
Find out if a website is down for everyone or just you. Instant HTTP status and response time from our edge.
Uptime HTTP status Response time
Check a website
Security
🔑
Password Generator
LIVE
Generate cryptographically random passwords with entropy score and time-to-crack estimate. Random or memorable passphrase modes.
Random Memorable Strength test Entropy
Generate a password
#️⃣
File Hash Verifier
LIVE
Drop any file to compute its MD5, SHA-1, SHA-256 and SHA-512 checksums. Paste the publisher's hash to instantly verify a download wasn't tampered with or corrupted.
Verify download SHA-256 SHA-512 Browser-only
Verify a file
🔑
JWT Decoder
LIVE
Paste a JSON Web Token to instantly decode its header, payload, and check expiry. Your token never leaves your device.
JWT Token decode Expiry check Browser-only
Decode a JWT
📋
HTTP Header Inspector
LIVE
Fetch and inspect HTTP response headers for any URL. Check security headers, CORS, caching policies and more.
Security headers CSP HSTS CORS
Inspect headers
Developer
🗂
JSON Formatter
LIVE
Paste JSON to format, minify, or validate it instantly. Side-by-side input/output with syntax validation.
Format Minify Validate Browser-only
Format JSON
🔤
Base64 Encoder / Decoder
LIVE
Encode text or files to Base64, or decode Base64 back to plain text. Supports file drag-and-drop for data URI conversion.
Encode Decode File support Data URI
Encode / Decode
🔗
URL Encoder / Decoder
LIVE
Encode special characters in URLs or decode percent-encoded strings. Supports full URL and component encoding modes.
Percent-encode Query string encodeURI
Encode / Decode URL
🔍
Regex Tester
LIVE
Test regular expressions live with real-time match highlighting, flag toggles (g, i, m, s) and capture group display.
Live match Capture groups Flags
Test a regex
Cron Expression Builder
LIVE
Build cron schedules visually, get a plain-English description, and see the next 5 run times in your local timezone.
Cron Scheduler Next runs Presets
Build a cron
Utilities
QR Code Generator
LIVE
Generate QR codes for URLs, text, email, phone, WiFi and contact cards. Download as PNG or SVG — free, no watermark.
URL WiFi vCard SVG download
Generate a QR code
🏷️
Meta Tags Checker
LIVE
See how any page looks in Google search results and on social media. Check title, description, Open Graph and Twitter Card tags.
SEO Open Graph Twitter Card Google preview
Check meta tags
🎨
Color Picker & Converter
LIVE
Pick any color and instantly convert between HEX, RGB, and HSL. Generate tints, shades, and complementary color palettes.
HEX RGB HSL Palette
Pick a color
🔀
Text Diff Checker
LIVE
Compare two blocks of text line-by-line. Added lines highlighted green, removed lines red — with added/removed line counts.
Diff Compare Line-by-line Browser-only
Compare text
🆔
UUID Generator
LIVE
Generate UUIDs v1 (time-based), v4 (random), or v5 (namespace+name). Bulk generate up to 100, validate, and copy all.
v4 Random v1 Time v5 Named Bulk
Generate UUIDs
🌍
World Timezone Converter
LIVE
Compare multiple time zones side by side on a live scrollable timeline. Add any city or timezone and instantly see current local times and overlapping hours.
Timezones World clock Team scheduling Live timeline
Compare timezones