How to Compress a PDF Under 1MB for Email Attachments

Email providers often cap attachments at 10–25MB, but many government and school portals still ask for files under 1MB.

Start with FreeTools Compress PDF to rewrite the file with object streams. For scanned PDFs full of photos, also try converting pages to images at a lower resolution, then rebuilding a PDF.

Avoid repeatedly compressing the same file—each pass can hurt quality. Export once from a high-quality source when possible.

Always preview the compressed PDF before submitting important applications.