When this compressor works best
It is useful for scanned paperwork, photo-heavy PDFs and documents that must fit an email or upload limit. It is not ideal when you must preserve selectable text, forms, digital signatures or accessibility tagging.
Browser-based tool
PDF Size Reducer & Compressor
Reduce PDF size by rendering pages at a selected quality and rebuilding the document as a smaller image-based PDF.
Choose a PDF
Create a smaller image-based PDF
This method rasterizes pages to reduce size. Searchable text, links, forms and selectable text may be flattened.
Compressed PDF ready
How to use it well
About this PDF size reducer
Settings, real-world decisions, release checks and limitations.
The PDF size reducer renders pages and rebuilds them with controlled image resolution and quality. This method can significantly reduce scanned PDFs and image-heavy documents that are too large for email or online forms.
Compression is a trade-off. Lower resolution and quality save more space, while higher settings preserve small text and fine diagrams. Start with a balanced preset and inspect the result before choosing stronger compression.
Choose settings by outcome
| Setting or choice | Choose it when | Trade-off |
|---|---|---|
| Small file | Fast sharing and portals with strict limits | Small text and diagrams may soften |
| Balanced | General scans and email | Moderate reduction with readable output |
| Higher quality | Fine text, stamps and detailed diagrams | Larger output |
| Grayscale | Black-and-white paperwork | Removes meaningful colors, highlights and stamps |
Recommended workflow
- 1
Keep an untouched copy because this method rasterizes pages.
- 2
Start with Balanced and leave color enabled when stamps or highlights matter.
- 3
Open the result and inspect the smallest text, signatures and barcodes.
- 4
Use Small file only when the balanced result remains above the required limit.
Common uses
- Compress a scanned application document
- Reduce a PDF below an email limit
- Create a smaller copy for mobile sharing
- Convert color scans to grayscale for additional savings
Important limitations
- Selectable text and vector graphics can become raster images
- Already-optimized PDFs may not become much smaller
- Password-protected PDFs may not be processable
Troubleshooting
The compressed PDF is larger
The source may already be optimized; keep the original or try a different workflow.
Text is blurry
Use Higher quality or avoid raster compression for digital text PDFs.
Forms or signatures stopped working
Use the original; raster compression is not appropriate for interactive or signed documents.
PDF Size Reducer & Compressor FAQ
Why does this method flatten text?
Each page is rendered as an image and placed into a new PDF.
When is it most effective?
Scanned, photographed and image-heavy PDFs usually benefit most.
Can it preserve digital signatures?
No guarantee. Rebuilding the file typically invalidates or removes signature structures.
Should I use grayscale?
Only when all meaningful content is monochrome.
Can it guarantee a specific MB target?
No. The result depends on page count, dimensions and visual complexity.