# Compress & optimize PDF free — no upload

> Compress PDF free in your browser. Keep selectable text by default, or flatten, grayscale, and invert locally. No upload, no watermark.

Canonical: https://mypdf.space/optimize
Last updated: 2026-10-26

## Overview

Make PDFs lighter and print-ready without a server. Compression and page rendering stay on your device.

Start with compress PDF free when attachments are too large for email. Keep-text mode preserves selectable text; max-shrink trades size for raster pages with a searchable overlay when text exists. Flatten forms, grayscale, and invert colours for print or dark-mode reading — all offline-capable after install.

## Tools in this category

- [Compress PDF](https://mypdf.space/tools/compress) — Shrink PDFs locally — keep selectable text by default, or max-shrink with a searchable overlay.
- [Flatten forms](https://mypdf.space/tools/flatten) — Flatten form fields so values can no longer be edited.
- [Grayscale PDF](https://mypdf.space/tools/grayscale) — Convert pages to grayscale for printing — searchable text overlay kept when available.
- [Invert colours](https://mypdf.space/tools/invert-colours) — Invert every page for dark-mode reading — searchable text overlay kept when available.

## FAQ

### Do these tools upload my PDF?

No. Every tool in this category runs in your browser. File bytes are not sent to a PDF upload API.

### Are the tools free?

Yes — free, no account, and no watermark on exports.

### What can I do in Optimize?

Make PDFs lighter and print-ready without a server. Compression and page rendering stay on your device.

## Related

- [Home](https://mypdf.space)
- [Guides](https://mypdf.space/guides)