PDF compression guides

Each guide answers one real question, explains what decides the result, and works whether or not you use PDFTuck.

How to compress a PDF to 100 KB on Android

Set 100 KB as a custom target in a size-aware compressor such as PDFTuck, then check the preview. 100 KB is a tiny budget, so it works best for one or two scanned pages. For longer documents, remove pages you don't need or split the file first.

Updated 17 October 2026 →
How to reduce a PDF to under 1 MB

Tap the 1 MB (or 2 MB) target in PDFTuck and compress. For scans and photos this limit is usually reachable with readable pages. If the PDF is mostly text and still won't fit, the file may already be near its smallest size, and removing pages is the reliable fix.

Updated 17 October 2026 →
How to compress a PDF without uploading it

Use an app that compresses on the device instead of a website. PDFTuck compresses the PDF on your Android phone and works with no internet connection; the file is never uploaded for compression. The app does use the internet for Google ads and consent messages, which never receive your PDF.

Updated 17 October 2026 →
PDF too large to upload? Here's how to fix it

Find the exact limit the form allows, then compress the PDF to that number. On Android, PDFTuck lets you type the limit in KB or MB and only reports success when the measured file fits. If compression isn't enough, remove unneeded pages or split the file.

Updated 17 October 2026 →