Email attachment compression
Compress a PDF for Gmail
Make a PDF easier to attach and send while keeping the output quality suitable for reading.
Compression target
Target: under 25MB
Gmail's attachment limit is larger than many portal limits, so balanced compression is usually enough unless the PDF contains large scans.
OptiPDF does not promise an exact final size. The compressor tries the right preset, then the result page shows the real compressed size and whether it reached the target.
Frequently Asked Questions
It depends on the level. Recommended balances quality and size well. Less Compression keeps near-original quality. Extreme prioritizes smaller file size, which may slightly reduce image quality.
Extreme gives the smallest file size but may reduce image quality. Recommended is the best balance for most documents. Less Compression keeps quality high with moderate size reduction.
Yes, that's one of the most common uses. The Recommended level usually reduces files enough to fit within email attachment limits (typically 25MB).
Yes. Your files are processed securely and deleted from our servers immediately after compression. We never read or store your documents.
Yes. All compression levels are completely free with no watermarks, no limits, and no registration required.
Other PDF Tools
Merge PDF
Combine multiple PDF files into a single document in seconds.
Split PDF
Extract pages or split a PDF into separate files.
Unlock PDF
Remove PDF permission locks or decrypt files when you know the password.
PDF to Word
Convert PDF files into editable Word documents online.
PDF to JPG
Convert each page of your PDF into a high-quality JPG image.
OCR PDF
Make scanned PDFs searchable by adding a text layer with OCR.
Black and White PDF
Convert any PDF to grayscale black and white pages.