Compress PDF to 500KB Online

This page is configured for a 500KB PDF limit used by email, forms and document portals.

picture_as_pdfChoose or drop a file herePDF · up to 40 MBChoose file

Target size

Compression modeBalancedStrongStrong compression can flatten pages into images for a smaller file.

lockProcessed privately in your browser

How it works

1
Choose a PDF from your device.
2
Select balanced or strong compression.
3
Process and download the smaller PDF.

Frequently asked questions

Is this PDF compressor free?add

Yes. You can use it without an account.

Is my PDF uploaded?add

No. Processing runs in your browser.

What does strong compression do?add

It can rebuild pages as compressed images. This often makes files smaller but selectable text may be lost.

Will the result be exactly 500 KB?add

SmallMB targets 500 KB or slightly below it. Most portals enforce a maximum size, so a result under the limit is normally accepted.

PRACTICAL SIZE GUIDE

What a 500 KB target means

target

Best used for

A 500 KB PDF is a practical target for application forms, short scans and portals with a strict document limit.

tune

How SmallMB reduces the file

Balanced mode optimizes the existing PDF first. If that cannot meet the limit, strong mode can rebuild pages as compressed images; selectable text may be lost.

fact_check

Before you upload

Open every page of the downloaded PDF.
Check names, numbers, stamps and signatures at normal zoom.
Keep the original because strong compression may flatten selectable text.

verifiedTool guidance maintained by Naman Labs · Reviewed September 2026 · SmallMB