Developer Tools
7 free browser-based tools — no signup, no limits, no cost.
All Developer Tools
7 toolsBulk Email Validator
Validate email addresses with 8 layers — RFC 5322 syntax, live MX lookup, SPF, DMARC, 750+ disposable domains, role detection, typo correction. Score 0–100 per email.
DNS Health Checker
Full DNS audit — checks A, AAAA, MX, NS, SPF, DMARC, DKIM, CAA, CNAME and SOA records. Live checks via Cloudflare. Health grade A+ to F with per-issue fix guidance.
JSON Formatter
Format and validate JSON
Base64 Encoder Decoder
Encode and decode Base64
CSS Gradient Generator
Generate CSS gradients visually
Password Generator
Generate strong passwords
QR Code Generator
Create QR codes instantly
What are Developer Tools?
FreeAIToolz offers 7 free developer tools — all browser-based with zero data storage and no account required. These tools include Bulk Email Validator, DNS Health Checker, JSON Formatter, Base64 Encoder Decoder and more. Every tool runs instantly in your browser and produces results in seconds.
Are these developer tools free?
Yes. All 7 tools in this category are 100% free with no premium tier, no word limits, and no signup required. FreeAIToolz is built on the principle that powerful tools should be accessible to everyone.