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

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

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

Security

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

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

Developer

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

Utilities

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

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.

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

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 →

Free tools fordevelopers & the web.

Free tools for
developers & the web.