Ontoom

Ontoom

Online generators and validators for testing

CPF, CNPJ, IBAN, SSN, VAT, QR codes and more — free in the browser, no sign-up. Synthetic data for developers and QA.

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All tools

29 tools

Person generatorCPF, ID, driver's license, address and contacts
CPF generatorSynthetic valid CPF for tests
CNPJ generatorValid CNPJ with or without mask
RG generatorFictional ID for tests
UUID generatorUUID v4 for IDs and fixtures
Password generatorStrong configurable passwords
CPF validatorChecks check digits
CNPJ validatorValidates CNPJ numbers
Barcode generatorEAN-13, Code 128, UPC and more
Digitable line to barcodeConvert up to 10 payment slips
OCR — text from imageUpload an image and extract the text in the browser
QR Code generatorURL, Wi-Fi, WhatsApp, text and more
Dynamic QR and statusDestination, active/paused and expiry
IBAN generator and validatorEuropean IBAN for banking tests
SSN generator and validatorUS Social Security Number
VAT generator and validatorEuropean Union VAT / IVA
Image metadataEXIF, GPS, camera and file data
cURL onlinePaste, run and inspect the HTTP response
JSON formatterBeautify, minify and validate JSON
Base64 UniversalFile ↔ Base64 in the browser — any format, no upload
JWT encode / decodeDecode, validate and create JWT (HS256)
HTTP status codesQuick reference for 1xx–5xx statuses
Pomodoro25/5 focus timer with cycles and sound
Roman numeralsDecimal ↔ roman, instant
Factor a numberPrime factors and divisors
GCDGreatest common divisor
LCMLeast common multiple
Rule of threeDirect and inverse
Division remainderQuotient and remainder