PDFStay
Compress Scanned PDF Online
Reduce scanned PDF size by resampling pages in the browser, useful for IDs, forms, and scan-heavy documents.
Answer
Reduce scanned PDF size by resampling pages in the browser, useful for IDs, forms, and scan-heavy documents. Choose a file from your device. Pick the settings that fit the task. Process locally and download the result. Prepare files for upload limits. Clean up documents before submission. Yes. Normal PDFStay tools run in the browser, so files stay on your device.
Product facts
- This page describes a three-step workflow: Choose a file from your device. Pick the settings that fit the task. Process locally and download the result. PDFStay page
- The browser processing path uses PDF.js and pdf-lib. PDF.js · pdf-lib
- Normal processing stays in the browser session unless a future cloud feature clearly asks for upload. PDFStay privacy policy
- Input: scan-style PDF; output: one processed PDF. PDFStay reproducible tool check
- Free includes the default balanced scan setting; scan intensity and color-retention controls are Pro. PDFStay reproducible tool check
At a glance
| Supported input | scan-style PDF PDFStay reproducible tool check |
|---|---|
| Output | one processed PDF. PDFStay reproducible tool check |
| Free / Pro boundary | Free includes the default balanced scan setting; scan intensity and color-retention controls are Pro. PDFStay reproducible tool check |
| Check method | Choose a scan-style PDF and process it with the default balanced scan setting. PDFStay reproducible tool check |
| Output check | The result is downloadable as a PDF after processing. PDFStay reproducible tool check |
| Known boundary | The check does not claim OCR, text recovery, or identical visual output from every scanned source. PDFStay reproducible tool check |
- Keep a scanned PDF legible while reducing its size
Use a visual review checklist to reduce scan pages without overlooking small text, stamps, or signatures.
- Understand resolution before reducing scanned pages
Separate PPI from printer DPI and check whether raster detail is appropriate for the scan's intended use.
Sources
- PDFStay page (first-party)
- PDFStay privacy policy (first-party)
- PDF.js (official)
- pdf-lib (official)
- PDFStay reproducible tool check (first-party-method)
Last updated: 2026-07-12
How it works
- Choose a file from your device.
- Pick the settings that fit the task.
- Process locally and download the result.
Privacy / no upload
Normal PDFStay tools process files in the current browser session. Files stay on your device unless a future cloud feature clearly asks for upload.
Common use cases
- Prepare files for upload limits.
- Clean up documents before submission.
- Keep sensitive PDFs in your browser session.
FAQ
Can I use this without upload?
Yes. Normal PDFStay tools run in the browser, so files stay on your device.