Lero Lero - Form Filler

Fill forms quickly with realistic fake data and generated text for testing.

Lero Lero – Form Filler helps developers, testers, and product teams fill web forms quickly with fictitious data and test text. Smart Fill detects form fields and automatically selects suitable generators for names, emails, phone numbers, addresses, numbers, dates, identifiers, and text. The goal is to reduce repetitive work during development, QA, demos, and manual validation. FREE FEATURES Smart Fill for automatic form filling Fill the currently selected field Local fictitious-data generators Lero Lero text with different styles and sizes Templates with relative dates and random values Up to 3 local profiles Per-field rules using generators, templates, fixed values, or skip Visual field picker and Profile Editor Local JSON backup and restore Interface available in Brazilian Portuguese and English LERO LERO PRO A Pro license adds advanced capabilities to the same extension: Unlimited local profiles Advanced URL matching with glob/path patterns, validated regular expressions, query-string conditions, and priorities Advanced templates with controlled cross-field references and deterministic conditionals Field dependencies with cycle validation and predictable fill ordering Guided Fill for working through forms field by field with navigation and contextual actions Optional BYOK (Bring Your Own Key) providers for local Ollama, Google Gemini, and HTTPS OpenAI-compatible APIs OPTIONAL AI AI features are optional and available with Pro. The user chooses and configures the provider they want to use. Ollama works through localhost/127.0.0.1. For Gemini and OpenAI-compatible services, the user provides their own API key. Provider credentials are stored locally by the extension and are not included in configuration exports or sent to the Lero Lero licensing service. Remote AI requests only occur after an explicit user action and go directly from the extension to the selected provider. PRIVACY AND CONTROL Lero Lero's main workflow is local-first. Form contents, profiles, templates, and generated values are not sent to the licensing server. Page access is temporary and initiated by the user through Chrome permissions. The extension does not maintain browsing history and does not include advertising or analytics. The Pro license uses the Lero Lero service only for license activation, validation, entitlement refresh, and management of authorized installations. USAGE Open the Lero Lero popup on a page containing a form and choose Fill form. Smart Fill analyzes the fields and inserts suitable fictitious data. For more specific workflows, use profiles, templates, selected-field filling, or Guided Fill. Generated data is fictitious and intended for development and testing. Do not use fictitious data when a system requires real or legally valid information.