Herramientas gratuitas para la web

Más de 120 herramientas online gratuitas para la detección de WordPress, el análisis SEO, el desarrollo web y la creación de contenido. Sin registro. Respetuosas con la privacidad. Adaptadas a móvil. Gratis para siempre.

Detectores de CMS y temas

Identifica la pila tecnológica detrás de cualquier sitio web

WordPress Theme & Plugin Detector

Detect WordPress themes, plugins, and hosting behind any site.

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Shopify Theme Detector

Identify the Shopify theme behind any storefront.

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Magento Theme Detector

Find the theme used on any Magento store.

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Joomla Template Detector

Identify Joomla templates on any site.

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Drupal Theme Detector

Detect Drupal themes including custom and contrib.

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Moodle Theme Detector

Find the theme used on Moodle LMS installs.

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PrestaShop Theme Detector

Detect PrestaShop themes on any storefront.

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Herramientas de SEO

Análisis y validación de SEO on-page

Meta Tags Analyzer

Extract and analyze every meta tag from any URL.

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Heading Hierarchy Analyzer

Audit H1-H6 structure for SEO and accessibility issues.

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Schema Markup Validator

Extract and validate JSON-LD schema from any page.

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Open Graph Inspector

Preview how a URL appears on Facebook, Twitter, and LinkedIn.

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Sitemap Inspector

Analyze any XML sitemap — URL count, lastmod, structure.

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robots.txt Inspector

Parse robots.txt and flag common mistakes.

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Page Word Count

Count visible words on any URL.

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Image Alt Text Auditor

Find every image missing alt text on a page.

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Internal Link Map

Map every internal link on a page with anchor text.

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Broken Link Checker

Test every link on a page for broken status codes.

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Keyword Density Analyzer

Analyze keyword density and frequency in any text.

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Canonical Tag Checker

Check the canonical URL of any page.

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SERP Preview Tool

Preview how your page appears in Google search results.

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Title Tag Length Checker

Check title length in pixels and characters.

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Meta Description Checker

Check meta description length and preview.

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Twitter Card Validator

Validate Twitter Card meta tags on any URL.

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LinkedIn Share Preview

Preview how URLs appear when shared on LinkedIn.

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Mobile-Friendly Checker

Test if any page meets mobile-friendly standards.

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XML Sitemap Generator

Build a custom XML sitemap for your site.

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Keyword Suggestion Tool

Generate related keyword ideas from any seed phrase.

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Herramientas para desarrolladores

Utilidades de codificación, decodificación, formateo y conversión

JWT Decoder

Decode JSON Web Tokens (JWT) instantly — inspect the header, payload, and signature claims. Runs entirely in your browser; tokens never leave your device. Safe for production secrets.

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JSON Formatter & Validator

Format, validate, and minify JSON instantly. Catches syntax errors with line numbers, pretty-prints with adjustable indent, supports large payloads. Runs in your browser — no upload.

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XML Formatter & Beautifier

Format and beautify XML documents — proper indentation, line breaks, namespace handling. Useful for SOAP responses, sitemaps, RSS feeds, and Android resource files.

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Base64 Encoder & Decoder

Encode and decode Base64 strings.

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URL Encoder & Decoder

Encode/decode URL-safe strings.

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HTML Entity Encoder & Decoder

Convert special characters to/from HTML entities.

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CSS Minifier

Minify CSS to reduce file size.

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HTML Minifier

Strip whitespace and comments from HTML.

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JavaScript Minifier

Basic JavaScript minification.

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Regex Tester

Test JavaScript regular expressions live.

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Hash Generator (MD5/SHA)

Generate MD5, SHA-1, SHA-256, SHA-512 hashes.

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UUID Generator

Generate v4 UUIDs.

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Unix Timestamp Converter

Convert between Unix timestamps and dates.

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Timezone Converter

Convert times between any two time zones.

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Cron Expression Builder

Build and explain cron schedule expressions.

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YAML to JSON Converter

Convert YAML to JSON in your browser.

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JSON to YAML Converter

Convert JSON to YAML format.

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JSON to XML Converter

Convert JSON objects to XML markup.

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XML to JSON Converter

Convert XML documents to JSON objects.

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SQL Formatter

Format and beautify SQL queries.

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Text Diff Checker

Compare two text blocks side-by-side.

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HTML Formatter

Format and beautify HTML markup.

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JavaScript Formatter

Format and beautify JavaScript code.

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CSS Formatter

Format and beautify CSS stylesheets.

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Base32 Encoder & Decoder

Encode and decode Base32 strings.

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Generadores

Genera nombres, contraseñas, códigos y contenido

Password Generator

Generate secure random passwords.

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WordPress Username Generator

Generate secure WordPress usernames.

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Domain Name Generator

Generate available-looking domain name ideas.

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Business Name Generator

Generate brandable business name ideas.

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URL Slug Generator

Convert text to URL-friendly slugs.

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Lorem Ipsum Generator

Generate placeholder text in paragraphs, words, or bytes.

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QR Code Generator

Generate QR codes for URLs, text, WiFi, vCards.

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UTM Link Builder

Build campaign-tagged URLs for analytics.

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robots.txt Generator

Build a custom robots.txt visually.

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.htaccess Snippet Generator

Generate common .htaccess rules.

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Red y dominio

Inspección de DNS, WHOIS, SSL y HTTP

DNS Lookup

Look up DNS records (A, AAAA, MX, TXT, NS) for any domain.

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WHOIS Lookup

Get full WHOIS data for any domain.

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SSL Certificate Checker

Check SSL certificate validity, issuer, and expiry.

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HTTP Header Analyzer

Inspect HTTP response headers and security signals.

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HTTP Status Code Checker

Check status code of any URL — single or bulk.

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Redirect Chain Tracer

Follow every hop in a redirect chain.

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Mixed Content Checker

Find HTTP resources loaded on HTTPS pages.

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Page Size Analyzer

Measure HTML, CSS, JS, and image weights of any page.

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Gzip / Brotli Compression Test

Check if a URL is properly compressed.

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IP Address Lookup

Look up location, ISP, and ASN for any IP address.

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Subnet Calculator

Calculate subnet ranges, masks, and hosts.

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CIDR Calculator

Calculate CIDR notation and address ranges.

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Email Address Validator

Validate email syntax, MX records, and deliverability.

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Port Checker

Check if a TCP port is open on any host.

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Reverse DNS Lookup

Resolve a PTR record from any IP address.

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Domain Age Checker

Check the age of any domain from WHOIS data.

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SSL Grade Tester

Grade SSL configuration of any HTTPS site.

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Herramientas de contenido

Utilidades de redacción, análisis y formateo

Word & Character Counter

Count words, characters, sentences, paragraphs.

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Reading Time Calculator

Estimate reading time for any text.

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Headline Analyzer

Score headlines for engagement and SEO.

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Email Subject Line Tester

Score email subject lines for open rate.

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Markdown to HTML

Convert Markdown to HTML.

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HTML to Markdown

Convert HTML to clean Markdown.

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Twitter Character Counter

Count characters for Twitter/X posts.

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Instagram Caption Counter

Count Instagram caption length and hashtags.

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Blog Title Generator

Generate engaging blog post title ideas.

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Slogan Generator

Generate catchy slogans for your brand.

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Hashtag Generator

Generate relevant hashtags from a topic or text.

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Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case.

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Text Cleaner

Remove extra whitespace, line breaks, and formatting.

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Text Reverser

Reverse text, words, or letters in any string.

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Diseño y CSS

Selectores de color, generadores de CSS y herramientas visuales

Color Converter (HEX/RGB/HSL)

Convert colors between HEX, RGB, HSL, OKLCH.

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CSS Box Shadow Generator

Build CSS box-shadow visually.

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CSS Gradient Generator

Build linear and radial CSS gradients.

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Cubic Bezier Generator

Build CSS easing curves visually.

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Color Palette Generator

Generate harmonious color palettes from any base color.

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CSS Border Radius Generator

Build complex CSS border-radius visually.

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CSS Clamp Generator

Generate responsive CSS clamp() functions.

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Flexbox Generator

Build CSS flexbox layouts visually.

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Conversores

Convierte entre formatos y unidades

JSON to CSV Converter

Convert JSON arrays to CSV.

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CSV to JSON Converter

Convert CSV to JSON arrays.

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CSV to SQL INSERT

Generate SQL INSERT statements from CSV.

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Binary to Hex Converter

Convert binary numbers to hexadecimal.

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Hex to Binary Converter

Convert hexadecimal to binary numbers.

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Decimal to Binary Converter

Convert decimal numbers to binary, hex, octal.

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ASCII to Hex Converter

Convert text to ASCII hex codes and back.

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Unit Converter

Convert between length, weight, temperature, and time units.

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Herramientas de imagen

Comprime, convierte, redimensiona y optimiza imágenes

Image Compressor

Compress JPG/PNG/WebP images in your browser — no upload.

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Image to Base64

Convert any image file to a Base64 data URL.

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Base64 to Image

Decode a Base64 data URL back to an image file.

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Favicon Generator

Generate a multi-size favicon from any image.

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Image Resizer

Resize images to any dimensions in your browser.

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PNG to JPG Converter

Convert PNG images to JPG with adjustable quality.

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JPG to PNG Converter

Convert JPG images to lossless PNG.

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WebP Converter

Convert images to or from WebP format.

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SVG Optimizer

Optimize SVG markup — strip metadata, minify paths.

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Image Cropper

Crop images precisely in your browser.

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Seguridad y cifrado

Herramientas de hash, cifrado, contraseñas y criptografía

Bcrypt Hash Generator

Generate bcrypt password hashes (client-side).

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HMAC Generator

Generate HMAC signatures with SHA-256, SHA-1, MD5.

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AES Encryption

Encrypt and decrypt text with AES-256 in your browser.

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2FA QR Code Generator

Generate TOTP/2FA QR codes for authenticator apps.

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Password Strength Tester

Test password strength against entropy and dictionaries.

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Caesar Cipher Encoder

Encode and decode Caesar cipher with custom shifts.

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ROT13 Encoder

Encode and decode ROT13 text instantly.

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Morse Code Translator

Translate text to and from Morse code.

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Binary Translator

Translate text to and from binary code.

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WordPress Salt Generator

Generate fresh WordPress auth keys and salts for wp-config.php.

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Herramientas en las que puedes confiar

Cada herramienta se ejecuta en tu navegador o en nuestros servidores: tus datos nunca se comparten. Sin niveles de pago, sin muros de registro, sin venta tras venta. Ganamos dinero con recomendaciones honestas de alojamiento y anuncios, no encerrando herramientas tras muros de pago.