Rubtin

Overview

Rubtin is a privacy-first web utility suite providing fully client-side tools for various digital operations. It allows users to manage and edit PDF files, manipulate image sizes and formats, format developer data, perform financial calculations, generate business invoices, and use local AI utilities such as OCR text extraction, voice transcription, and sentiment analysis directly in the browser. Since all operations run locally via JavaScript, documents and data are never uploaded to any remote server, ensuring complete privacy, security, and no network delays.

How to Use

Navigate to the website, select the specific tool you need from the directory (e.g., Merge PDF, Compress Image, JSON Formatter), and interact with the tool directly in your browser. Since processing is 100% local, you can drop files or input text to get instant results without waiting for any file uploads.

Core Features

Use Cases

1. 1 Combining multiple contracts or joining scanned pages into a single PDF safely.
2. 2 Reducing PNG, JPG, and WebP file sizes locally for website speed optimization without data leaks.
3. 3 Validating, formatting, and debugging API payloads instantly using the JSON Formatter.
4. 4 Generating professional business invoices client-side and printing them directly to PDF.
5. 5 Extracting readable text from document scans locally using the OCR Text Extractor.

Frequently Asked Questions