Engineering Blog

To reduce PDF size on Mac without losing quality, run it through a free online compressor set to a moderate level, or use Preview's File > Export > Reduce File Size option — the online route generally gives you more control over the size-versus-clarity tradeoff.

To lock a confidential PDF contract, invoice, or legal brief with AES-256 (NIST FIPS 197) encryption—and enforce granular permissions that block printing, copying, and modification—without paying for Adobe Acrobat Pro or uploading your unencrypted file to a vulnerable cloud server, here is the precise architecture Utilitly uses.

To convert a PNG to JPG, or any image to WebP, without uploading your design files to a cloud server, you need a local canvas rasterization engine that processes the pixel data and alpha channel entirely in your browser's graphics memory. Here is the exact architecture Utilitly uses.

To reduce the file size of high-resolution photos and design assets without uploading them to a cloud server, you need a local image compressor that processes the pixel data directly inside your browser's graphics memory via the HTML5 Canvas API. Here is the precise technical pipeline Utilitly uses.

To rearrange or reorder pages inside a PDF without expensive desktop software or cloud tools that capture your data, you need a client-side page organizer that updates the document's internal byte-offsets directly in your browser's local memory via WebAssembly.

To extract a specific page range from a large confidential PDF without uploading it to a cloud server, you need a zero-trust local splitter that operates directly on the file's binary byte array inside your browser's RAM. Here is how the technology works.

Companies converting invoices and legal templates face a critical compliance problem: uploading those documents to legacy cloud servers violates strict HIPAA, GDPR, and SOC 2 data retention policies. Client-side PDF to Word conversion running natively in the browser sandbox eliminates this risk entirely.

To reduce a PDF that is too large to email, you can use a client-side compression engine that runs entirely in your browser RAM, stripping metadata and downsampling DPI without uploading your file to any cloud server.

Combining multiple PDF documents shouldn't require a $20/month subscription. Learn how to merge PDFs instantly right in your browser. We do it for free.

Client-side WebAssembly (WASM) secures online PDF utilities by executing compiled binary code directly within the user's browser sandbox, completely eliminating server-side retention risks.

To convert raw AI text into print-ready PDF reports without layout shift, you can use the newly updated client-side AI Author engine on Utilitly.com.