PDFscaler is a browser-based document processing toolkit offering merging, compressing, splitting, and converting of PDF files entirely on the client side, ensuring all operations remain local. Users can combine documents, reduce file sizes, extract pages, and convert PDFs to Word, JPG, PowerPoint, and Excel formats without uploads or accounts. Image editing tools include cropping, resizing, compression, background removal, and format conversion between PNG, JPG, and WebP. AI-powered OCR extracts text from images and supports instant translation. Additional features include financial calculators, currency converters, age and BMI calculators, word counters, QR code generators, password creators, and JSON formatting tools. With a privacy-by-design approach, no file logging or caching occurs. Local processing ensures fast performance across desktop, mobile, and tablet devices.