Tools for developers

CPF Generator

Generate valid CPFs for system testing with options to select state of origin and formatting

RG Generator

Generate valid RGs for system testing with formatting options

CNPJ Generator

Generate valid CNPJs for system testing with options to select state of origin and formatting

CPF Validator

Use to confirm whether a CPF number is real and valid

CNPJ Validator

Check numeric and alphanumeric CNPJs against the Receita Federal rule and see which digit failed

Brazilian Voter Registration Number Generator

Generate fictional Brazilian voter registration numbers with 12 digits for testing

PIS/PASEP Generator

Generate valid Brazilian PIS/PASEP, NIS and NIT numbers with a check digit for testing

Brazilian CNS (SUS Card) Generator

Generate valid CNS numbers, definitive or provisional, with a validator, to test Brazilian health sign-ups

Brazilian License Number Generator

Generate valid Brazilian driver's license numbers for system testing

License Plate (Mercosul) and RENAVAM Generator

Generate Mercosul-standard Brazilian plates and valid RENAVAM numbers, with a validator on the same page

Brazilian Phone Number Generator

Generate Brazilian mobile and landline numbers with a valid area code and the carrier of your choice, for test sign-ups

Fake Brazilian Company Generator

Generate complete Brazilian companies with a valid CNPJ, CNAE, address and person in charge, to test B2B sign-ups

Fake Brazilian Person Generator

Generate a complete Brazilian person with name, CPF, RG, date of birth by age range, phone, email and address, for test sign-ups

Credit Card Generator

Generate credit card numbers for testing with CVV, expiration date, and support for multiple card networks

Credit Card Validator

Verify if card numbers are valid and automatically discover the brand

Test Cards by Gateway

Sandbox cards for Mercado Pago, Stripe, PagBank, Cielo, Rede and other gateways, with the result rule and the official source

BIN Lookup

Look up a card's brand, issuing bank, type, and country from its BIN/IIN

Pix Copia e Cola Reader and Decoder

Read a Pix Copia e Cola code or QR image and see each BR Code field, the key and whether the CRC matches, with nothing sent to a server

Character and Word Counter

Count characters, words and visualize character density in your text

WhatsApp URL Generator

Create custom links to start WhatsApp conversations

JSON Formatter

Format, validate, and minify JSON, with exact error locations and a tree view

UUID Generator

Create v4 and v7 UUIDs for databases, testing, and APIs, in bulk and in the format you need

Date Format Converter

Format a date as ISO 8601, UTC string and milliseconds

Unix Timestamp Converter

Convert epoch to date and date to epoch, with seconds or milliseconds detection and a time zone picker

Cron Expression Generator

See what a cron expression does in plain English, its next runs in your time zone and which field is wrong

Regex Tester

Test JavaScript regex with ready-made patterns for Brazilian CPF, CNPJ, CEP, phone and plates, without sending the text to any server

JSON to CSV Converter

Take an API response to Excel or turn a spreadsheet into JSON, in the browser and without sending anything to a server

Base64 Decoder

Decode and encode Base64 with correct UTF-8, Basic auth headers, Kubernetes Secrets and files, without sending anything to a server

Image to Base64

Turn an image into a data URI for HTML and CSS, or Base64 back into an image with preview and download

JWT Decoder

Decode JWTs, see whether they are still valid and check roles, scopes and the signature without sending the token anywhere

JWT Generator

Create HS256-signed JWTs to test access profiles, expiration and 401 and 403 responses

Hash Generator

Create MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files and verify a download checksum

HMAC Generator

Compute HMAC-SHA256 and verify webhook signatures from GitHub, Stripe, Shopify, Mercado Pago and Slack

Bcrypt Generator

Hash a test user's password with bcrypt and check whether a password matches a stored hash