Does compression keep the text selectable?

No. Pages are re-rendered as images, so text becomes part of the picture. Keep the original if you need selectable text.

Are my files uploaded?

No, the PDF is rendered and rebuilt entirely in your browser.

Which preset should I choose?

Screen for email and web sharing, ebook for reading on devices, and print when the file still has to be printed.

Why did my file get bigger?

PDFs that are mostly vector text are already tiny; rasterising them can increase size. Lower the DPI or keep the original in that case.

Can I compress a password-protected PDF?

Yes, enter the password when prompted and the unlocked pages will be compressed.

PDF Compressor

Shrink a PDF's file size with screen, ebook or print presets.

Support

Works Offline

Privacy First

No Login

No API

File API

Canvas

Blob

PDF file

Compression runs entirely in your browser

Drop a file here

Drop a PDF — up to 100 MB

Compression settings

Pages are re-rendered as optimised JPEG images, so text becomes part of the image

Preset

Resolution — 120 DPI

JPEG quality — 72%

GrayscaleSmaller files for scans

Drop a PDF and press Compress to shrink it.

About the PDF Compressor

Reduce a PDF's size by re-rendering its pages at a lower resolution and re-encoding them as JPEG. Choose a screen, ebook, print or custom preset, tune DPI and quality, optionally convert to grayscale, and see exactly how much you saved before downloading.

Examples

Email-friendly

scan.pdf (18.4 MB), screen preset

Output

scan-compressed.pdf — 1.9 MB (90% smaller)

Grayscale ebook

manual.pdf (7.2 MB), ebook + grayscale

Output

manual-compressed.pdf — 1.4 MB

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-27 · Runs entirely in your browser