2026-07-31
How to Attempt Lossless PDF Optimization for Email
Attempt lossless PDF structure optimization, compare measured sizes, and choose a different authorized workflow when image recompression is required.
Know what this workflow can change
LocalPDF attempts lossless PDF structure optimization. It does not recompress embedded images, so visually scanned or image-heavy documents may not shrink and a smaller output is not guaranteed.
Run once and use the measured result
Select one PDF within the published browser input limit, run the optimization, and compare the displayed input and output byte counts. Keep the original when the output is not smaller; use another approved tool if the job requires lossy image recompression.
Validate before sending
Open the downloaded PDF independently and inspect representative pages, links, forms, and signatures. The supported workflow avoids a document-byte processing upload to LocalPDF, while your device, email provider, and recipient remain separate security boundaries.