Compress PDF to 1MB

Shrink large PDFs to under 1MB for email and portals. Free, private, runs in your browser.

Real byte savingsSelectable qualityOn-device processingNo upload API

Loading compressor workspace…

Two honest methods

Lossless rewrites PDF objects and preserves text, links, forms and vectors, but savings can be small. Raster redraws each page as JPEG for stronger reduction.

Raster trade-offs

Raster output loses selectable text, links, forms, layers, signatures and accessibility structure. It is best for scans or share copies, not archival masters.

STEP BY STEP

How to use PDF Optimizer

Make a PDF smaller: keep text sharp (lossless, small savings) or turn pages into images (much smaller, lossy).

Choose a PDF. The first page preview, page count and size appear.
Pick a Compression method. For “Turn pages into images”, set Image sharpness (DPI), Image quality and optionally grayscale.
The optimised PDF is created automatically; the result shows the new size and savings.
Click Download.

What you get

One PDF; the result says how much smaller (or larger) it is.

EVERY CONTROL

Options explained

Option	What it does
Compression method	Keep text sharp (lossless: keeps text, links, forms; may save little) or Turn pages into images (lossy: much smaller, text becomes part of a picture).
Image sharpness (DPI)	72–240 (default 120). Lower = smaller, less sharp. Only for “Turn pages into images”.
Image quality	35–92 % (default 72 %). Only for “Turn pages into images”.
Grayscale raster output	Converts pages to black and white for extra savings.
Output name	Default compressed-document.pdf.
Cancel	Stops after the current page.

Limits & tips

Every tool follows the same three steps shown above it — 1 Upload or enter input, 2 Choose options, 3 Preview & download — with a status line that says what to do next. On a computer the options sit on the left and middle and the preview & result panel stays on the right; progress (with % where available) is shown inside that panel. On phones the steps stack in order. Start over clears the tool.
Rasterized PDFs lose selectable text, links, forms and signatures; keep the original.
If the output is larger, lower DPI or quality.
Non-PDF files are rejected with “This file is not a PDF. Choose a PDF document (the file must start with a %PDF header).” and any previous result is cleared.

Explore more pdf tools, or browse the complete tool sitemap.