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Reduce PDF file size by re-encoding with pdf-lib's object stream compression.
The KaruviLab PDF Compressor is a secure, browser-native tool designed to reduce the file size of your PDF documents instantly. Whether you need to meet file size limits for email attachments, online job applications, or web uploads, this tool helps you optimize your PDFs without compromising document quality.
Traditional PDF compression tools often require you to upload your documents to a cloud server, raising significant privacy concerns. KaruviLab operates on a zero-upload, local-first principle. Your PDF files are processed entirely within your web browser, ensuring your sensitive business documents, contracts, and personal records stay strictly on your device.
Our compressor uses advanced algorithms to identify redundant data and efficiently pack your document, delivering a significantly smaller file while retaining text readability and image clarity. It is the perfect solution for anyone managing large document libraries and wanting to balance performance with data privacy.
Input
15MB scanned invoice PDFOutput
3MB optimized PDFYes. All processing occurs locally in your browser. Your files are never uploaded to any server.
We strive to preserve as much visual fidelity as possible. The compression focuses on removing redundant metadata and optimizing image data that is often unnecessarily large in digital PDFs.
Currently, our compressor works best with standard, unprotected PDFs. Please unlock your file before compression.
To ensure browser stability, we suggest files under 50MB. Larger documents may require more browser memory and can lead to performance issues on mobile devices.