Developer Tools
Formatters, validators, encoders, and generators for web development.
Base64 Encoder/Decoder
Encode and decode text using Base64 locally.
AvailableLocalCPF / CNPJ Generator & Validator
Generate and validate Brazilian CPF and CNPJ documents with Modulo 11 check digit verification.
AvailableLocalCron Expression Generator & Validator
Build, validate, and decode 5-field cron expressions with next run times.
AvailableLocalHTML Entity Encoder/Decoder
Encode and decode HTML entities safely.
AvailableLocalJavaScript Event Loop Simulator
Model the call stack and task queues step by step.
AvailableLocalJSON Diff Checker
Compare two JSON values and list changed paths.
AvailableLocalJSON Schema Validator
Validate JSON data against a schema locally.
AvailableLocalJSON to TypeScript
Infer TypeScript interfaces from JSON samples.
PopularAvailableLocalJSON, YAML & XML Formatter
Format, minify, and validate JSON and XML, and convert between JSON and YAML.
AvailableLocalJSONPath Tester
Test JSONPath expressions and view matched values.
AvailableLocalJWT Decoder
Decode JWT header and payload locally.
PopularAvailableLocalQR Code Generator & Reader
Create QR codes and read QR images locally.
AvailableLocalRegex Tester
Test regular expressions and preview replacements.
AvailableLocalSQL Formatter
Format messy SQL into a more readable query.
AvailableLocalTest Data Generator
Generate fictional names, emails, UUIDs, dates, and numbers.
AvailableLocalUnix chmod Permissions Calculator
Convert chmod numbers, rwx notation, and permission checkboxes.
PopularAvailableLocalUnix Timestamp Converter
Convert Unix timestamps (seconds and milliseconds) to dates and vice versa.
PopularAvailableLocalURL Encoder/Decoder
Encode and decode URLs in separate tabs, with batch and recursive options.
PopularAvailableLocalUUID Generator
Generate standards-compliant UUID v4 and GUID identifiers individually or in bulk.
AvailableLocalXPath Tester
Run XPath expressions against XML locally.