Free Email & Developer Tools

Free online content tools for everyday text and media tasks — generate QR codes, scan barcodes, convert text case, count words, compare document differences, and create random strings. No account required, no data stored.

Professional email authentication tools to configure and verify DMARC, DKIM, and SPF records for your domain. Improve email deliverability, fix inbox placement issues, test spam scores, check email blacklists, and analyze email headers — everything senders need to pass authentication checks and stay out of the spam folder.

Email validation and discovery tools to verify email addresses, detect disposable inboxes, identify free providers, extract emails from text, and find professional contact addresses by domain. Essential for list hygiene, lead generation, and reducing bounce rates.

Online privacy and security tools to protect your accounts and personal data. Check if your email or password appeared in a known data breach, generate strong secure passwords, audit your domain for email privacy risks, and detect disposable email usage. Built privacy-first — no data stored or logged.

Free network and DNS lookup tools for sysadmins, developers, and security researchers. Query live DNS records (A, MX, TXT, CNAME, NS, AAAA), look up IP geolocation and ISP data, and convert between CIDR notation and IP address ranges instantly in your browser.

Free developer tools for everyday coding tasks — format and validate JSON, encode and decode Base64 or URLs, generate UUIDs and cryptographic hashes, minify CSS and JavaScript, convert HTML to Markdown, and transform Unix timestamps. All tools run client-side in your browser with no data sent to any server.