Tools

Generate and validate Brazilian CPF and CNPJ online — including the new alphanumeric CNPJ format (2026). Free for testing and prototypes.

• cpf
• cnpj
• brasil
• cnpj alfanumérico

Generate and validate unique CUID2, UUID v4, UUID v7, and Nano ID identifiers online, one at a time or in bulk. Copy with one click for APIs, databases, and logs.

• uuid
• cuid
• nanoid
• uuidv7
• validate

Create QR codes for URLs, text, Wi-Fi, email, and phone numbers. Customize colors and download as PNG or SVG — free in the browser.

• qr
• wifi

Compute SHA-256, SHA-512, and MD5 hashes of any text online. Free developer tool — processing runs in your browser.

• crypto
• sha

Sign and verify messages with HMAC-SHA256 or HMAC-SHA512. Online playground to test payload integrity and authentication.

• crypto
• hmac

Encrypt and decrypt text with AES-GCM or AES-CBC via the Web Crypto API. Keys and IV in hex or Base64 — runs in the browser.

• crypto
• aes

Encrypt and decrypt text with a password via Envelopa (Argon2id + AES-256-GCM) — runs locally in the browser.

• crypto
• e2ee

Generate two-factor TOTP codes from a Base32 secret or otpauth:// URI. Compatible with Google Authenticator and similar apps.

• 2fa
• otp

Encode, decode, inspect, and verify JWT tokens in the browser. Generate HMAC tokens, view header and payload, time claims, and validate signatures.

• jwt
• crypto
• auth

Test regular expressions with live match and group highlighting. Flags, replace mode, and ready-made examples included.

• regex

Format and parse date strings with custom date-fns patterns. Live examples and tokens like yyyy, MM, and dd.

• date
• date-fns

Paste Markdown and preview rendered HTML in real time with syntax highlighting, GFM tables, and side-by-side view.

• markdown

Simulate Brazilian returns with CDI, Selic, IPCA, or a fixed rate. Charts for growth, composition, and portfolio projection over time.

• finanças
• investimentos

Convert colors between HEX, RGB, HSL, and OKLCH with live preview. Explore perceptually uniform spaces and copy CSS values.

• cores
• css

Encode and decode text in Base64 with URL-safe support. Free online tool — ideal for APIs, JWT, and data transfer.

• encoding
• base64

Format, minify, and query JSON with JSONPath online. Validate syntax, adjust indentation, and extract fields from complex payloads.

• json
• jsonpath

Flatten nested JSON into flat keys (dot or bracket) and rebuild the original structure. Useful for configs, spreadsheets, and APIs.

• json
• flatten

Compress JSON with gzip deterministically and reversibly in the browser. Generate a base64 envelope to store or transfer smaller payloads.

• json
• compress
• gzip

Convert between JSON and YAML with real-time validation. Useful for CI configs, Kubernetes, Docker Compose, and env files.

• yaml
• json

Format or minify XML online — 2 or 4 space indentation, ideal for sitemaps, RSS, and configs.

• xml
• formatter

Reduce JPG, PNG, and WebP photo file size in the browser — no server upload.

• imagem
• compressão
• jpeg
• png
• webp

Add a text watermark to JPG, PNG, and WebP with presets, fonts, and full-resolution export.

• imagem
• marca d’água
• watermark
• jpeg
• png
• webp

Reduce the color palette of JPG, PNG, and WebP in the browser — ImageQuant WebAssembly with optional dithering, no upload.

• imagem
• quantização
• paleta
• png
• dithering

Convert PNG/JPG/WebP logos, icons, and flat illustrations into SVG vectors in the browser — powered by VTracer and SVGO, no upload.

• svg
• png
• vetorizar
• vtracer
• imagem

Remove metadata from JPEG and PNG photos (GPS, camera, date) in the browser — no upload.

• privacidade
• imagem
• jpeg
• exif

Minify and clean SVG files in the browser — remove metadata, comments, and unnecessary code without uploading to a server.

• svg
• otimização
• minificar

Convert an SVG to favicon.ico (16×16 and 32×32) in the browser — no server upload.

• svg
• favicon
• imagem
• ico

Upload an SVG and generate Expo icon and splash assets at the sizes you need for iOS, Android, and web — all in the browser.

• expo
• react-native
• svg
• icon
• splash
• mobile

Analyze meta tags, JSON-LD, HTTP headers, robots.txt, sitemap, and manifest in a single request.

• seo
• audit
• json-ld
• headers
• robots
• sitemap
• manifest

Paste a URL and see how the link would appear on WhatsApp, Facebook, X, LinkedIn, Telegram, Discord, and Slack.

• open-graph
• whatsapp
• facebook
• twitter
• linkedin
• telegram
• discord
• slack
• seo

Analyze a site robots.txt and sitemap.xml: crawl rules, indexable URLs, and warnings.

• robots
• sitemap
• seo

Inspect a PWA manifest.json — name, icons, and theme color.

• pwa
• manifest
• seo

Query a domain /.well-known/lnurlp endpoint and validate the LNURL-pay response.

• bitcoin
• lightning
• lnurl
• lnurlp

Convert between Bitcoin and satoshi in real time, with 8 decimal places of precision.

• bitcoin
• satoshi
• btc

Look up Bitcoin address balance and on-chain transactions (mainnet).

• bitcoin
• blockchain
• endereco
• explorer

Decode a Bitcoin mainnet address: type (P2PKH, P2SH, P2WPKH, P2TR), witness version, and hex payload.

• bitcoin
• endereco
• bech32
• mainnet

Decode raw hex Bitcoin transactions: inputs, outputs, fee, and weight.

• bitcoin
• transacao
• hex
• decoder