Validate email address format locally — regex shape, @ presence, domain TLD, and length/dot rules with named issues. No disposable-domain or MX checks. Code never leaves your device.
Content reviewed October 2026 · About Toolzum
Validate YAML formatting, detect indentation issues, convert YAML to JSON, and minify YAML comments. Code never leaves your device — formatting and validation run locally in your browser.
Validate GitHub Actions workflow YAML — checks for workflow name, on trigger, jobs section, and correct YAML structure. Identifies formatting issues and missing fields.
Validate OAuth state parameters for format, length, and age — catch CSRF holes before they ship. Nothing leaves your browser.
Validate IBAN structure, length, and mod-97 check digits for 80+ countries. Catch transfer typos before money moves — local ibantools work, free, no signup.
Generate a free disposable email address (temp mail / throwaway email) that receives mail for 60 minutes. Inbound only — you cannot send or reply. Perfect for signups you don’t trust, confirmation codes, and keeping your real inbox spam-free.
No — a practical regex plus length/dot rules, not full RFC 5322 grammar. Edge-valid addresses may fail; that is the documented tradeoff.
No typo suggestions — misspelled domains (gmial, yaho) simply fail the format rules. Re-read the domain yourself.
No IDN/punycode handling — Unicode characters pass the shape check only when an @ and dotted domain are present.
No — validation runs locally in your browser, free with no signup.