Tools for Developers & IT Pros
138 toolsNetwork diagnostics, browser testing, and hardware validation tools. DNS lookup, IP analysis, system diagnostics, display calibration, and accessibility checking.
Online Whiteboard
A board per student, no sign-up; LaTeX formulas and graphs, chalkboard and grid, PDF pages, stylus pressure. Send a link — the lesson starts.
JSON Formatter
Beautify, minify, and validate JSON in the browser. Live error line/column, 2/4/Tab indent. Free, no signup.
Base64
Encode and decode Base64 in the browser. UTF-8 safe, URL-safe variant, file uploads. Auto-detect direction. Free.
URL Encoder
Encode and decode URL strings in the browser. Component vs full-URL mode, + for space, auto-detect. Free.
Regex Tester
Test JavaScript regular expressions in the browser. Highlight matches, see groups, preview replacement. Free.
JWT Decoder
Decode and inspect JSON Web Tokens in the browser. Header, payload, expiry, claims explained. No signing. Free.
UUID Generator
Generate UUID v4 (random), v7 (time-ordered), v1 (timestamp) or Nil UUIDs in your browser. Bulk, formatted, validated. Free.
Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes for text or files in your browser. HMAC, hex or base64.
Hash Identifier
Identify the algorithm behind any hash: MD5, SHA-256, bcrypt, Argon2, NTLM and 50+ more. Ranked matches with hashcat & John modes. Free.
Screen Sharing
Share your screen with anyone via a link or 6-letter code. No camera, optional voice, nothing to install.
Redact Photo
Blur, pixelate or black out faces, text and numbers on a photo or screenshot. Finds IDs and card numbers for you, then checks they are unreadable.
QR file transfer
One screen streams the file as QR codes, the other device reads them with its camera.
Creation Date Certificate
Create a tamper-proof certificate that timestamps when your file existed — RFC 3161 trusted timestamp, verifiable by anyone. Free.
Russian–Latin Transliterator
Convert Cyrillic to Latin in 9 standards side by side — passport, GOST, ICAO, BGN/PCGN and more. Compare them, reverse the conversion, export a PDF name card.
IP Lookup
Look up any IP address or domain to see its location, ISP, VPN status, and more.
DNS Lookup
Look up DNS records for any domain. All record types supported, results from multiple resolvers.
WHOIS Lookup
Look up registration details for any domain name including registrar, dates, nameservers, and DNSSEC status.
Redirect Checker
Enter a URL to see the full redirect chain with HTTP status codes, response times, and server details.
SSL Checker
Enter a domain to inspect its HTTPS certificate: who issued it, when it expires, whether the chain is complete and which TLS versions the server accepts.
Checksum Calculator
Hash any file with 6 algorithms. Verify downloads, compare files, find duplicates.
IPv6 Test
Test your IPv6 support, detect connection type, compare latency, and check for leaks.
Cookie Checker
Scan any website to discover all cookies, trackers, and privacy risks in seconds.
Browser Fingerprint
Real entropy bits, live cohort comparison, defense test, and visual fingerprint art — see exactly how trackable your browser is.
What Is My Browser
Instantly detect your browser, OS, screen, hardware, codecs, and web API support. Copy all info for tech support or download a PDF report.
