How Client-Side PDF Compression Works
Online PDF compression tools usually force users to upload confidential files to third-party cloud servers, creating data privacy and security vulnerabilities.
Our client-side compression tool re-renders each PDF page onto an HTML5 Canvas completely inside your local web browser memory using WebAssembly.
By re-encoding image streams and lowering raster dimensions, you can shrink documents down below strict file upload limits (such as 200KB for government or job portals) without uploading a single byte to an external server.
Frequently Asked Questions
How do I compress a PDF under 200KB?
Select "Compact (60% Scale)" and adjust the quality slider down to 20-30%. This significantly downsamples image streams while preserving readable text.
Is my document uploaded anywhere?
No. All page re-rendering and image compression algorithms execute locally within your device browser thread.