Diretório de ferramentas
Navegue por todas as ferramentas do FreeSEOTools.com
Explore ferramentas práticas para SEO, escrita, otimização de imagens e tarefas com PDF, organizadas em categorias simples.
Formatador JSON
Formatar, embelezar e validar dados JSON.
Codificar/Decodificar Base64
Codificar texto em Base64 ou decodificar strings Base64.
Gerador de UUID
Gerar identificadores UUID v4 aleatórios.
Decodificador JWT
Decodificar e inspecionar JSON Web Tokens.
Conversor de timestamp Unix
Converter timestamps Unix em datas e vice-versa.
Testador de Regex
Testar expressões regulares com destaque em tempo real.
Gerador de expressões Cron
Criar expressões de agendamento Cron visualmente.
Comparador de textos
Comparar dois textos e destacar as diferenças.
Markdown para HTML
Converter Markdown em HTML com pré-visualização ao vivo.
Gerador de hash
Gerar hashes SHA-1, SHA-256 e SHA-512.
HTML Minifier
Minify HTML by removing comments, whitespace, and optional quotes for smaller pages and faster loading.
CSS Minifier
Minify CSS by stripping comments, blank lines, and excess whitespace to ship smaller stylesheets.
JavaScript Minifier
Minify JavaScript by removing comments and unnecessary whitespace for faster page loads.
URL Encoder / Decoder
Encode or decode URL components and full URLs (percent-encoding) for safe links, query strings, and APIs.
Credit Card Validator
Validate credit card numbers using the Luhn checksum and detect the card brand (Visa, Mastercard, Amex, Discover, JCB).
HTTP Headers Checker
Inspect HTTP response status, redirect chain, and security headers for any public URL — including HSTS, CSP, and X-Frame-Options.
DNS Records Lookup
Look up A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA DNS records for any domain using public Cloudflare and Google resolvers.
WHOIS Lookup
Run a public WHOIS / RDAP lookup on any domain to see registrar, registration dates, expiration, status flags, and nameservers.
SSL Certificate Checker
Inspect a domain's SSL/TLS certificate chain, expiry date, issuer, fingerprint, and protocol — useful for catching expiring or misconfigured certs.