# Compress a PDF to 3 MB

> Compress a PDF under 3 MB for WhatsApp document send, chat, or portals. Pre-set to a safe 2,929 KB target. No upload.

Canonical: https://mypdf.space/compress-pdf/3mb
Last updated: 2026-10-26

## Answer

Drop your PDF into the compressor below. It’s pre-set to 2,929 KB so the file stays under 3 MB either way. A practical target when sending a PDF as a **WhatsApp document** or when a portal sits between 2 MB and 5 MB.

## What fits comfortably

Most multi-page scans and almost any text document.

## What is squeezed

Very large photo-heavy stacks at lower DPI if needed.

## Context

WhatsApp and similar apps handle document PDFs more reliably when they are a few megabytes rather than tens of megabytes from phone camera scans.

Sending as a document (not as a photo) keeps the PDF intact; compression here is for size, not for converting pages into chat images.

## Tips

- **Send as Document** in WhatsApp so recipients get a real PDF, not a compressed photo of a page.
- **Split huge bundles** if chat still struggles — use [Split PDF](https://mypdf.space/tools/split).
- **Preview on your phone** after download; that is how the recipient will read it.

## FAQ

### What size PDF works best on WhatsApp?

A few megabytes is usually comfortable. This page targets just under 3 MB. Very large scans may still need splitting.

### Does WhatsApp compress my PDF further?

Document sends usually keep the file intact. Photo/media sends re-encode images and are worse for text PDFs.

### Does this tool upload my chat PDF?

No. Compression runs in your browser before you attach the file.

## Related

- [Compress PDF hub](https://mypdf.space/compress-pdf)
- [Compress tool](https://mypdf.space/tools/compress)